intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

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intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

Adam Holt-2
I haven't figured out the pattern yet, but perhaps 50% of the time these XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard, but the keys end up mapped to all the wrong places, showing the wrong letters/numbers, such that not even the ESC key works to get to the Ok prompt).

This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as 13.2.5 with SD cards.  In other words both of these:

Running the "bye" command at the Ok prompt seems to trigger the problem almost every time (possibly every time?).  But that is not the only thing that triggers the problem.  Sometimes the XO just boots with unusable keyboard, repeatedly.  Then when I try to hit ESC on boot 20 times in a row, I cannot reproduce the problem at other times.  Problem occurs on all SKU39 XO-1s I've tried so far.

I've not yet tried other SKU's.  My testing has only just begun, to see if this same problem occurs with (both) 13.2.4 OS's and earlier.

Any tips for debugging / identifying the source of this quite serious gremlin?  What should I and my small team of debugging volunteers look out for and try?  And I'll do more work on this when I get back home late tonight, but all thoughts appreciated-

(Also, any recommendations as to which older builds are best, as an interim workaround?)

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Re: intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

Adam Holt-2
Just an update that I've narrowed in on the/a pattern which triggers the problem, with the help of James Cameron, and some workarounds:
  • Tapping the ESC key very rapidly during bootup causes the keyboard mismapping (and hence, failure to enter Open Firmware).
  • Holding down the ESC key during bootup (generally, but not always) avoids the problem (entering Open Firmware).
  • Typing no keys at all during initial bootup, appears (I hope) to be a workaround to boot the OS properly, with keyboard functioning properly.
Better yet, earlier firmware (e.g. q2e41 in this case) does not appear to show the problem at all, so newer firmware may be available in future to solve this annoying-but-less-serious-that-I-imagined problem.  For all using SKU39 XO-1s (or perhaps other/similar XO laptops having the modern touchpad?)

On Mon, Aug 3, 2015 at 7:03 PM, Adam Holt <[hidden email]> wrote:
I haven't figured out the pattern yet, but perhaps 50% of the time these XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard, but the keys end up mapped to all the wrong places, showing the wrong letters/numbers, such that not even the ESC key works to get to the Ok prompt).

This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as 13.2.5 with SD cards.  In other words both of these:

Running the "bye" command at the Ok prompt seems to trigger the problem almost every time (possibly every time?).  But that is not the only thing that triggers the problem.  Sometimes the XO just boots with unusable keyboard, repeatedly.  Then when I try to hit ESC on boot 20 times in a row, I cannot reproduce the problem at other times.  Problem occurs on all SKU39 XO-1s I've tried so far.

I've not yet tried other SKU's.  My testing has only just begun, to see if this same problem occurs with (both) 13.2.4 OS's and earlier.

Any tips for debugging / identifying the source of this quite serious gremlin?  What should I and my small team of debugging volunteers look out for and try?  And I'll do more work on this when I get back home late tonight, but all thoughts appreciated-

(Also, any recommendations as to which older builds are best, as an interim workaround?)

--
Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org !

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Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

Gonzalo Odiard-3
I don't think the error reported by Alan is related with the last (or latest) builds at all.
This is related to a very old bug, I was looking but couldn't find the ticket.

Gonzalo 

On Tue, Aug 4, 2015 at 1:07 PM, Caryl Bigenho <[hidden email]> wrote:
Hi…

So…  the XO-1s at the project we have at a school at a women's shelter in central Los Angeles will be updated in the next couple of weeks, getting ready for September school start. What would be the safest build for them to use? I won't be there to help, but it is in good hands with one of our SoCal volunteers. I just want to make it easy for everything to go smoothly.

Thanks,
Carul


Date: Tue, 4 Aug 2015 09:28:23 -0400
From: [hidden email]
To: [hidden email]; [hidden email]
Subject: Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39


Just an update that I've narrowed in on the/a pattern which triggers the problem, with the help of James Cameron, and some workarounds:
  • Tapping the ESC key very rapidly during bootup causes the keyboard mismapping (and hence, failure to enter Open Firmware).
  • Holding down the ESC key during bootup (generally, but not always) avoids the problem (entering Open Firmware).
  • Typing no keys at all during initial bootup, appears (I hope) to be a workaround to boot the OS properly, with keyboard functioning properly.
Better yet, earlier firmware (e.g. q2e41 in this case) does not appear to show the problem at all, so newer firmware may be available in future to solve this annoying-but-less-serious-that-I-imagined problem.  For all using SKU39 XO-1s (or perhaps other/similar XO laptops having the modern touchpad?)

On Mon, Aug 3, 2015 at 7:03 PM, Adam Holt <[hidden email]> wrote:
I haven't figured out the pattern yet, but perhaps 50% of the time these XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard, but the keys end up mapped to all the wrong places, showing the wrong letters/numbers, such that not even the ESC key works to get to the Ok prompt).

This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as 13.2.5 with SD cards.  In other words both of these:

Running the "bye" command at the Ok prompt seems to trigger the problem almost every time (possibly every time?).  But that is not the only thing that triggers the problem.  Sometimes the XO just boots with unusable keyboard, repeatedly.  Then when I try to hit ESC on boot 20 times in a row, I cannot reproduce the problem at other times.  Problem occurs on all SKU39 XO-1s I've tried so far.

I've not yet tried other SKU's.  My testing has only just begun, to see if this same problem occurs with (both) 13.2.4 OS's and earlier.

Any tips for debugging / identifying the source of this quite serious gremlin?  What should I and my small team of debugging volunteers look out for and try?  And I'll do more work on this when I get back home late tonight, but all thoughts appreciated-

(Also, any recommendations as to which older builds are best, as an interim workaround?)

--
Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org !

_______________________________________________ support-gang mailing list [hidden email] http://lists.laptop.org/listinfo/support-gang

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Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

James Cameron-2
In reply to this post by Adam Holt-2
Yes, it almost never happens for a child, has been known since
2011, is specific to the single panel touchpad assembly on XO-1, and
is solved by following (to the letter) our community documentation:

http://wiki.laptop.org/go/Ok

... instead of historic practices that were learned on the three panel
touchpad assembly.  ;-)

On Tue, Aug 04, 2015 at 09:28:23AM -0400, Adam Holt wrote:

> Just an update that I've narrowed in on the/a pattern which triggers the
> problem, with the help of James Cameron, and some workarounds:
>
>   • Tapping the ESC key very rapidly during bootup causes the keyboard
>     mismapping (and hence, failure to enter Open Firmware).
>   • Holding down the ESC key during bootup (generally, but not always) avoids
>     the problem (entering Open Firmware).
>   • Typing no keys at all during initial bootup, appears (I hope) to be a
>     workaround to boot the OS properly, with keyboard functioning properly.
>
> Better yet, earlier firmware (e.g. q2e41 in this case) does not appear to show
> the problem at all, so newer firmware may be available in future to solve this
> annoying-but-less-serious-that-I-imagined problem.  For all using SKU39 XO-1s
> (or perhaps other/similar XO laptops having the modern touchpad?)
>
> On Mon, Aug 3, 2015 at 7:03 PM, Adam Holt <[1][hidden email]> wrote:
>
>     I haven't figured out the pattern yet, but perhaps 50% of the time these
>     XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard, but the
>     keys end up mapped to all the wrong places, showing the wrong letters/
>     numbers, such that not even the ESC key works to get to the Ok prompt).
>
>     This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as
>     13.2.5 with SD cards.  In other words both of these:
>
>        [2]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
>        [3]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
>
>     Running the "bye" command at the Ok prompt seems to trigger the problem
>     almost every time (possibly every time?).  But that is not the only thing
>     that triggers the problem.  Sometimes the XO just boots with unusable
>     keyboard, repeatedly.  Then when I try to hit ESC on boot 20 times in a
>     row, I cannot reproduce the problem at other times.  Problem occurs on all
>     SKU39 XO-1s I've tried so far.
>
>     I've not yet tried other SKU's.  My testing has only just begun, to see if
>     this same problem occurs with (both) 13.2.4 OS's and earlier.
>
>     Any tips for debugging / identifying the source of this quite serious
>     gremlin?  What should I and my small team of debugging volunteers look out
>     for and try?  And I'll do more work on this when I get back home late
>     tonight, but all thoughts appreciated-
>
>     (Also, any recommendations as to which older builds are best, as an interim
>     workaround?)
>
>     --
>     Unsung Heroes of OLPC, interviewed live @ [4]http://unleashkids.org !
>
> References:
>
> [1] mailto:[hidden email]
> [2] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
> [3] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
> [4] http://unleashkids.org/

> _______________________________________________
> support-gang mailing list
> [hidden email]
> http://lists.laptop.org/listinfo/support-gang


--
James Cameron
http://quozl.linux.org.au/
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Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

James Cameron-2
In reply to this post by Adam Holt-2
G'day Caryl,

If you're asking with respect to the discussion thread, go ahead with
the latest 13.2.5, because the problem Adam is talking about won't affect
you or the women and children, it is very minor.

Otherwise, 13.2.5 is still the best for XO-1 because it can start
every activity at once if necessary, and has all the latest updates.

http://wiki.laptop.org/go/Release_notes/13.2.5/Installation/XO-1

On Tue, Aug 04, 2015 at 10:07:23AM -0600, Caryl Bigenho wrote:

> Hi…
>
> So…  the XO-1s at the project we have at a school at a women's shelter in
> central Los Angeles will be updated in the next couple of weeks, getting ready
> for September school start. What would be the safest build for them to use? I
> won't be there to help, but it is in good hands with one of our SoCal
> volunteers. I just want to make it easy for everything to go smoothly.
>
> Thanks,
> Carul
>
> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> Date: Tue, 4 Aug 2015 09:28:23 -0400
> From: [hidden email]
> To: [hidden email]; [hidden email]
> Subject: Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1
> SKU39
>
> Just an update that I've narrowed in on the/a pattern which triggers the
> problem, with the help of James Cameron, and some workarounds:
>
>   • Tapping the ESC key very rapidly during bootup causes the keyboard
>     mismapping (and hence, failure to enter Open Firmware).
>   • Holding down the ESC key during bootup (generally, but not always) avoids
>     the problem (entering Open Firmware).
>   • Typing no keys at all during initial bootup, appears (I hope) to be a
>     workaround to boot the OS properly, with keyboard functioning properly.
>
> Better yet, earlier firmware (e.g. q2e41 in this case) does not appear to show
> the problem at all, so newer firmware may be available in future to solve this
> annoying-but-less-serious-that-I-imagined problem.  For all using SKU39 XO-1s
> (or perhaps other/similar XO laptops having the modern touchpad?)
>
> On Mon, Aug 3, 2015 at 7:03 PM, Adam Holt <[1][hidden email]> wrote:
>
>     I haven't figured out the pattern yet, but perhaps 50% of the time these
>     XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard, but the
>     keys end up mapped to all the wrong places, showing the wrong letters/
>     numbers, such that not even the ESC key works to get to the Ok prompt).
>
>     This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as
>     13.2.5 with SD cards.  In other words both of these:
>
>        [2]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
>        [3]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
>
>     Running the "bye" command at the Ok prompt seems to trigger the problem
>     almost every time (possibly every time?).  But that is not the only thing
>     that triggers the problem.  Sometimes the XO just boots with unusable
>     keyboard, repeatedly.  Then when I try to hit ESC on boot 20 times in a
>     row, I cannot reproduce the problem at other times.  Problem occurs on all
>     SKU39 XO-1s I've tried so far.
>
>     I've not yet tried other SKU's.  My testing has only just begun, to see if
>     this same problem occurs with (both) 13.2.4 OS's and earlier.
>
>     Any tips for debugging / identifying the source of this quite serious
>     gremlin?  What should I and my small team of debugging volunteers look out
>     for and try?  And I'll do more work on this when I get back home late
>     tonight, but all thoughts appreciated-
>
>     (Also, any recommendations as to which older builds are best, as an interim
>     workaround?)
>
>     --
>     Unsung Heroes of OLPC, interviewed live @ [4]http://unleashkids.org !
>
> _______________________________________________ support-gang mailing list
> [hidden email] http://lists.laptop.org/listinfo/support-gang
>
> References:
>
> [1] mailto:[hidden email]
> [2] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
> [3] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
> [4] http://unleashkids.org/

> _______________________________________________
> support-gang mailing list
> [hidden email]
> http://lists.laptop.org/listinfo/support-gang


--
James Cameron
http://quozl.linux.org.au/
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Fwd: Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

Adam Holt-2
In reply to this post by Gonzalo Odiard-3
---------- Forwarded message ----------
From: "James Cameron" <[hidden email]>
Date: Aug 4, 2015 7:39 PM
Subject: Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39
To: "Gonzalo Odiard" <[hidden email]>
Cc: "Community Support Volunteers -- who help respond to help AT laptop.org" <[hidden email]>, "Danny Hembree" <[hidden email]>, "[hidden email]" <[hidden email]>, "Devel's in the Details" <[hidden email]>

G'day Gonzalo,

Thanks for the reminder.  Yes, it matches somewhat with #11223 and
#11468, especially the mapping of the keys that Adam observes.

https://dev.laptop.org/ticket/11223
https://dev.laptop.org/ticket/11468

No fix is possible at the moment, but changing procedure works fine.

p.s. my posts are not getting through to devel@ or support-gang@ due
to the DNS damage affecting laptop.org.

On Tue, Aug 04, 2015 at 03:17:02PM -0300, Gonzalo Odiard wrote:
> I don't think the error reported by Alan is related with the last (or latest)
> builds at all.
> This is related to a very old bug, I was looking but couldn't find the ticket.
>
> Gonzalo 
>
> On Tue, Aug 4, 2015 at 1:07 PM, Caryl Bigenho <[1][hidden email]> wrote:
>
>     Hi…
>
>     So…  the XO-1s at the project we have at a school at a women's shelter in
>     central Los Angeles will be updated in the next couple of weeks, getting
>     ready for September school start. What would be the safest build for them
>     to use? I won't be there to help, but it is in good hands with one of our
>     SoCal volunteers. I just want to make it easy for everything to go
>     smoothly.
>
>     Thanks,
>     Carul
>
>     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
>     Date: Tue, 4 Aug 2015 09:28:23 -0400
>     From: [2][hidden email]
>     To: [3][hidden email]; [4][hidden email]
>     Subject: Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on
>     XO-1 SKU39
>
>     Just an update that I've narrowed in on the/a pattern which triggers the
>     problem, with the help of James Cameron, and some workarounds:
>       □ Tapping the ESC key very rapidly during bootup causes the keyboard
>         mismapping (and hence, failure to enter Open Firmware).
>       □ Holding down the ESC key during bootup (generally, but not always)
>         avoids the problem (entering Open Firmware).
>       □ Typing no keys at all during initial bootup, appears (I hope) to be a
>         workaround to boot the OS properly, with keyboard functioning properly.
>     Better yet, earlier firmware (e.g. q2e41 in this case) does not appear to
>     show the problem at all, so newer firmware may be available in future to
>     solve this annoying-but-less-serious-that-I-imagined problem.  For all
>     using SKU39 XO-1s (or perhaps other/similar XO laptops having the modern
>     touchpad?)
>
>     On Mon, Aug 3, 2015 at 7:03 PM, Adam Holt <[5][hidden email]> wrote:
>
>         I haven't figured out the pattern yet, but perhaps 50% of the time
>         these XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard,
>         but the keys end up mapped to all the wrong places, showing the wrong
>         letters/numbers, such that not even the ESC key works to get to the Ok
>         prompt).
>
>         This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as
>         13.2.5 with SD cards.  In other words both of these:
>
>            [6]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
>            [7]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
>
>         Running the "bye" command at the Ok prompt seems to trigger the problem
>         almost every time (possibly every time?).  But that is not the only
>         thing that triggers the problem.  Sometimes the XO just boots with
>         unusable keyboard, repeatedly.  Then when I try to hit ESC on boot 20
>         times in a row, I cannot reproduce the problem at other times.  Problem
>         occurs on all SKU39 XO-1s I've tried so far.
>
>         I've not yet tried other SKU's.  My testing has only just begun, to see
>         if this same problem occurs with (both) 13.2.4 OS's and earlier.
>
>         Any tips for debugging / identifying the source of this quite serious
>         gremlin?  What should I and my small team of debugging volunteers look
>         out for and try?  And I'll do more work on this when I get back home
>         late tonight, but all thoughts appreciated-
>
>         (Also, any recommendations as to which older builds are best, as an
>         interim workaround?)
>
>         --
>         Unsung Heroes of OLPC, interviewed live @ [8]http://unleashkids.org !
>
>     _______________________________________________ support-gang mailing list
>     [9][hidden email] [10]http://lists.laptop.org/listinfo/
>     support-gang
>
>     _______________________________________________
>     support-gang mailing list
>     [11][hidden email]
>     [12]http://lists.laptop.org/listinfo/support-gang
>
> References:
>
> [1] mailto:[hidden email]
> [2] mailto:[hidden email]
> [3] mailto:[hidden email]
> [4] mailto:[hidden email]
> [5] mailto:[hidden email]
> [6] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
> [7] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
> [8] http://unleashkids.org/
> [9] mailto:[hidden email]
> [10] http://lists.laptop.org/listinfo/support-gang
> [11] mailto:[hidden email]
> [12] http://lists.laptop.org/listinfo/support-gang

> _______________________________________________
> Devel mailing list
> [hidden email]
> http://lists.laptop.org/listinfo/devel


--
James Cameron
http://quozl.linux.org.au/

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Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

James Cameron-3
In reply to this post by Adam Holt-2
G'day Caryl,

If you're asking with respect to the discussion thread, go ahead with
the latest 13.2.5, because the problem Adam is talking about won't affect
you or the women and children, it is very minor.

Otherwise, 13.2.5 is still the best for XO-1 because it can start
every activity at once if necessary, and has all the latest updates.

http://wiki.laptop.org/go/Release_notes/13.2.5/Installation/XO-1

On Tue, Aug 04, 2015 at 10:07:23AM -0600, Caryl Bigenho wrote:

> Hi…
>
> So…  the XO-1s at the project we have at a school at a women's shelter in
> central Los Angeles will be updated in the next couple of weeks, getting ready
> for September school start. What would be the safest build for them to use? I
> won't be there to help, but it is in good hands with one of our SoCal
> volunteers. I just want to make it easy for everything to go smoothly.
>
> Thanks,
> Carul
>
> ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
> Date: Tue, 4 Aug 2015 09:28:23 -0400
> From: [hidden email]
> To: [hidden email]; [hidden email]
> Subject: Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1
> SKU39
>
> Just an update that I've narrowed in on the/a pattern which triggers the
> problem, with the help of James Cameron, and some workarounds:
>
>   • Tapping the ESC key very rapidly during bootup causes the keyboard
>     mismapping (and hence, failure to enter Open Firmware).
>   • Holding down the ESC key during bootup (generally, but not always) avoids
>     the problem (entering Open Firmware).
>   • Typing no keys at all during initial bootup, appears (I hope) to be a
>     workaround to boot the OS properly, with keyboard functioning properly.
>
> Better yet, earlier firmware (e.g. q2e41 in this case) does not appear to show
> the problem at all, so newer firmware may be available in future to solve this
> annoying-but-less-serious-that-I-imagined problem.  For all using SKU39 XO-1s
> (or perhaps other/similar XO laptops having the modern touchpad?)
>
> On Mon, Aug 3, 2015 at 7:03 PM, Adam Holt <[1][hidden email]> wrote:
>
>     I haven't figured out the pattern yet, but perhaps 50% of the time these
>     XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard, but the
>     keys end up mapped to all the wrong places, showing the wrong letters/
>     numbers, such that not even the ESC key works to get to the Ok prompt).
>
>     This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as
>     13.2.5 with SD cards.  In other words both of these:
>
>        [2]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
>        [3]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
>
>     Running the "bye" command at the Ok prompt seems to trigger the problem
>     almost every time (possibly every time?).  But that is not the only thing
>     that triggers the problem.  Sometimes the XO just boots with unusable
>     keyboard, repeatedly.  Then when I try to hit ESC on boot 20 times in a
>     row, I cannot reproduce the problem at other times.  Problem occurs on all
>     SKU39 XO-1s I've tried so far.
>
>     I've not yet tried other SKU's.  My testing has only just begun, to see if
>     this same problem occurs with (both) 13.2.4 OS's and earlier.
>
>     Any tips for debugging / identifying the source of this quite serious
>     gremlin?  What should I and my small team of debugging volunteers look out
>     for and try?  And I'll do more work on this when I get back home late
>     tonight, but all thoughts appreciated-
>
>     (Also, any recommendations as to which older builds are best, as an interim
>     workaround?)
>
>     --
>     Unsung Heroes of OLPC, interviewed live @ [4]http://unleashkids.org !
>
> _______________________________________________ support-gang mailing list
> [hidden email] http://lists.laptop.org/listinfo/support-gang
>
> References:
>
> [1] mailto:[hidden email]
> [2] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
> [3] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
> [4] http://unleashkids.org/

> _______________________________________________
> support-gang mailing list
> [hidden email]
> http://lists.laptop.org/listinfo/support-gang


--
James Cameron
http://quozl.linux.org.au/
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Re: [support-gang] intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

James Cameron-3
In reply to this post by Adam Holt-2
Yes, it almost never happens for a child, has been known since
2011, is specific to the single panel touchpad assembly on XO-1, and
is solved by following (to the letter) our community documentation:

http://wiki.laptop.org/go/Ok

... instead of historic practices that were learned on the three panel
touchpad assembly.  ;-)

On Tue, Aug 04, 2015 at 09:28:23AM -0400, Adam Holt wrote:

> Just an update that I've narrowed in on the/a pattern which triggers the
> problem, with the help of James Cameron, and some workarounds:
>
>   • Tapping the ESC key very rapidly during bootup causes the keyboard
>     mismapping (and hence, failure to enter Open Firmware).
>   • Holding down the ESC key during bootup (generally, but not always) avoids
>     the problem (entering Open Firmware).
>   • Typing no keys at all during initial bootup, appears (I hope) to be a
>     workaround to boot the OS properly, with keyboard functioning properly.
>
> Better yet, earlier firmware (e.g. q2e41 in this case) does not appear to show
> the problem at all, so newer firmware may be available in future to solve this
> annoying-but-less-serious-that-I-imagined problem.  For all using SKU39 XO-1s
> (or perhaps other/similar XO laptops having the modern touchpad?)
>
> On Mon, Aug 3, 2015 at 7:03 PM, Adam Holt <[1][hidden email]> wrote:
>
>     I haven't figured out the pattern yet, but perhaps 50% of the time these
>     XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard, but the
>     keys end up mapped to all the wrong places, showing the wrong letters/
>     numbers, such that not even the ESC key works to get to the Ok prompt).
>
>     This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as
>     13.2.5 with SD cards.  In other words both of these:
>
>        [2]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
>        [3]http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
>
>     Running the "bye" command at the Ok prompt seems to trigger the problem
>     almost every time (possibly every time?).  But that is not the only thing
>     that triggers the problem.  Sometimes the XO just boots with unusable
>     keyboard, repeatedly.  Then when I try to hit ESC on boot 20 times in a
>     row, I cannot reproduce the problem at other times.  Problem occurs on all
>     SKU39 XO-1s I've tried so far.
>
>     I've not yet tried other SKU's.  My testing has only just begun, to see if
>     this same problem occurs with (both) 13.2.4 OS's and earlier.
>
>     Any tips for debugging / identifying the source of this quite serious
>     gremlin?  What should I and my small team of debugging volunteers look out
>     for and try?  And I'll do more work on this when I get back home late
>     tonight, but all thoughts appreciated-
>
>     (Also, any recommendations as to which older builds are best, as an interim
>     workaround?)
>
>     --
>     Unsung Heroes of OLPC, interviewed live @ [4]http://unleashkids.org !
>
> References:
>
> [1] mailto:[hidden email]
> [2] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1
> [3] http://wiki.laptop.org/go/Release_notes/13.2.5#XO-1_with_SD_card
> [4] http://unleashkids.org/

> _______________________________________________
> support-gang mailing list
> [hidden email]
> http://lists.laptop.org/listinfo/support-gang


--
James Cameron
http://quozl.linux.org.au/
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Re: intermittent keyboard mismapping: 13.2.5 on XO-1 SKU39

Adam Holt-2
In reply to this post by Adam Holt-2
Summary: while both 13.2.5 OS's for XO-1 SKU39 (and possibly similar SKU's) have a couple keyboard/mouse issues, arising from q2f20's EC firmware it seems -- the workaround to both issues appears very simple -- simply do not to touch the keyboard during these 2 critical moments:
  • during the first few seconds after powering on (hit/hold ESC key _after_ the XO kid appears in the center of your screen, if seeking the ok prompt on an unlocked XO)
  • when the XO is sleeping

Yes there's now also a bulletproof workaround to the 1st issue (keyboard mismapping if ESC is tapped too early during bootup) if you downgrade firmware from q2f20 to http://dev.laptop.org/~quozl/q2f20ed.rom which includes EC Firmware E35, dated 2010-08-23.  Wonderful that James Cameron isolated the problem.

But this fix might not be worth the trouble, as keyboard+mouse variously go haywire after sleep/wake -- up particularly if you touch the keyboard while XO's sleeping -- regardless which of these 2 firmwares.

Regardless, folks need to retrain (refrain) themselves on when to hit ESC on bootup: http://wiki.laptop.org/go/Ok#Unsecured

Conclusion: I'm not educated enough to know whether q2f20 or q2f20ed is best for one deployment or another.  Sticking with 13.2.5's stock firmware q2f20 (including EC Firmware 1.2.1) might well be easiest for many, certainly for now, sure the above 2 workarounds to require training, but both appear 100% effective so far.  Or if you do choose to downgrade to q2f20ed, note the 4 small accompanying regressions/risks below, and judge for yourself:

- you lose a fix for mouse activity at shutdown preventing reboot without keyboard,

- you lose a fix for battery EEPROM corruption, which happens if you are holding the power button down and insert the battery,

- you lose the AP (Auto Power) and CP (Constant Power) features for use as a server, and;

- you lose RTC anti-rollback support, which you shouldn't be using anyway.

Most important, let's all be very helpful James Cameron carefully explained the above tradeoff- whether XO-1 live forever or not as we shall see :-)


On Tue, Aug 4, 2015 at 9:28 AM, Adam Holt <[hidden email]> wrote:
Just an update that I've narrowed in on the/a pattern which triggers the problem, with the help of James Cameron, and some workarounds:
  • Tapping the ESC key very rapidly during bootup causes the keyboard mismapping (and hence, failure to enter Open Firmware).
  • Holding down the ESC key during bootup (generally, but not always) avoids the problem (entering Open Firmware).
  • Typing no keys at all during initial bootup, appears (I hope) to be a workaround to boot the OS properly, with keyboard functioning properly.
Better yet, earlier firmware (e.g. q2e41 in this case) does not appear to show the problem at all, so newer firmware may be available in future to solve this annoying-but-less-serious-that-I-imagined problem.  For all using SKU39 XO-1s (or perhaps other/similar XO laptops having the modern touchpad?)

On Mon, Aug 3, 2015 at 7:03 PM, Adam Holt <[hidden email]> wrote:
I haven't figured out the pattern yet, but perhaps 50% of the time these XO-1s boot with an unusable keyboard (it's a "US Intl" keyboard, but the keys end up mapped to all the wrong places, showing the wrong letters/numbers, such that not even the ESC key works to get to the Ok prompt).

This pattern arises with "vanilla" 13.2.5 (without SD cards) as well as 13.2.5 with SD cards.  In other words both of these:

Running the "bye" command at the Ok prompt seems to trigger the problem almost every time (possibly every time?).  But that is not the only thing that triggers the problem.  Sometimes the XO just boots with unusable keyboard, repeatedly.  Then when I try to hit ESC on boot 20 times in a row, I cannot reproduce the problem at other times.  Problem occurs on all SKU39 XO-1s I've tried so far.

I've not yet tried other SKU's.  My testing has only just begun, to see if this same problem occurs with (both) 13.2.4 OS's and earlier.

Any tips for debugging / identifying the source of this quite serious gremlin?  What should I and my small team of debugging volunteers look out for and try?  And I'll do more work on this when I get back home late tonight, but all thoughts appreciated-

(Also, any recommendations as to which older builds are best, as an interim workaround?)

--
Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org !



--
Unsung Heroes of OLPC, interviewed live @ http://unleashkids.org !

_______________________________________________
Devel mailing list
[hidden email]
http://lists.laptop.org/listinfo/devel