[yocto] Not booting on BeagleBoard xM 0x2

[Bruce Ashfield]

On Tue, Jun 12, 2012 at 7:00 PM, Ryan Julian <ryanjulian at berkeley.edu> wrote:
> Tomas Frydrych <tf+lists.yocto at ...> writes:
>> This is a different issue. I get this too with one particular MMC card,
>> but with 2.6.37 kernel, if I unplug this card and plug it back in the
>> boot resumes and completes successfully. If I do this with the 3.0.2
>> kernel, the bug I described with the associated kernel panic then kicks in.
>>
>> Tomas
>>
>> >
>> >
>> >
>> > _______________________________________________
>> > yocto mailing list
>> > yocto at ...
>> > https://lists.yoctoproject.org/listinfo/yocto
>>
>>
>
> Bruce and Tomas,
> Did you ever find a solution to this issue?
>
> I'm encountering the same issue on the BB-xM Rev C. I've tested on two different
> boards from different production runs, both with an error identical to Tomas'.
> I'd be happy to run tests/provide logs if given instructions.

We did. Denys provided us a fix, the only one that was available at the time:

commit a49b0ec1356bb15a6a8c76b76c464ab3f1f61840
Author: Bruce Ashfield <bruce.ashfield at windriver.com>
Date:   Tue Apr 17 13:45:47 2012 -0400

    meta/beagleboard: disable CONFIG_PREEMPT

    The boot hangs with the message:
    mmc0: error -110 whilst initialising SD card

    The MMC driver has issues initializing when PREEMPT is enabled
(either forced
    or voluntary). Unplugging and then plugging the card back will reset the
    driver and continue booting. Alternatively, disable preemption.

    Signed-off-by: Denys Dmytriyenko <denys at ti.com>
    Signed-off-by: Bruce Ashfield <bruce.ashfield at windriver.com>

:000000 100644 0000000... 0cbeb5a... A  bsp/beagleboard/no-preempt.cfg
:000000 100644 0000000... 1e75e15... A  bsp/beagleboard/no-preempt.scc

Cheers,

Bruce

>
> Thanks!
>
> -Ryan
>
>
>
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"Thou shalt not follow the NULL pointer, for chaos and madness await
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