Re: pandaboard not booting

[Gary Thomas <gary@mlbassoc.com>]

On 2012-09-27 07:55, Khem Raj wrote:
> On Thu, Sep 27, 2012 at 6:47 AM,  <Christian.Schulenberg@bmw.de> wrote:
>> Hi,
>>
>> as I wrote before, I have an older version. I used the kernel version of that one to start up my new meta-ivi build. It crashed later with a kernel panic, but at least the kernel is running.
>>
>> After that I compared the two kernel version I have, with mkimage -l.
>>
>> 1. Kernel version that is working quite well:
>>
>> mkimage -l uImage
>> Image Name:   Linux-3.1.0
>> Created:      Fri Sep 21 11:25:32 2012
>> Image Type:   ARM Linux Kernel Image (uncompressed)
>> Data Size:    4144744 Bytes = 4047.60 kB = 3.95 MB
>> Load Address: 80008000
>> Entry Point:  80008000
>>
>> 2. Kernel version that fails after uncompression:
>>
>> mkimage -l uImage
>> Image Name:   Linux-3.1.0
>> Created:      Thu Sep 27 07:07:25 2012
>> Image Type:   ARM Linux Kernel Image (uncompressed)
>> Data Size:    4176432 Bytes = 4078.55 kB = 3.98 MB
>> Load Address: 80008000
>> Entry Point:  80008000
>>
>> I don't see any major issues here, so I guess I need to check the toolchain as proposed by Enrico.
>>
>
> Download denzil SDK for arm which is gcc 4.6 based and compile kernel
> using that and see if that boots. There could be some kernel+toolchain
> interaction w.r.t gcc 4.7 which is what is
> default in current master/(would be 1.3) release, sometimes gcc
> exposes latent bugs in kernel
> and at times its wise versa

I've tried this kernel on a PandaBoard, built with both GCC-4.7.2 (latest master)
and GCC-4.6.3 (~denzil).  Both fail during to come up.

The next step would be to diagnose this with a JTAG.  Sadly, I've not been able
to get my XDS100v2 to work with the PandaBoard yet, so it'll have to be someone
else to carry this torch.

>
>> Christian
>>
>> -----Ursprüngliche Nachricht-----
>> Von: ebutera@gmail.com [mailto:ebutera@gmail.com] Im Auftrag von Enrico
>> Gesendet: Donnerstag, 27. September 2012 14:07
>> An: Schulenberg Christian, EI-42
>> Cc: meta-ti@yoctoproject.org
>> Betreff: Re: [meta-ti] pandaboard not booting
>>
>> On Thu, Sep 27, 2012 at 1:16 PM,  <Christian.Schulenberg@bmw.de> wrote:
>>> I'm using the same kernel version as I did before. It's the default kernel 3.1 as configured in the meta-ti layer: ti-ubuntu-3.1.0-1282.11, Revision: a5c60c099296fcfc0c8fa8085c40883971486512
>>>
>>> Do you really think it makes sense to switch to a more recent one?
>>
>> No, but i have no better ideas right now...
>>
>> You could check if it's a known toolchain bug with that kernel, but i
>> think it would be faster to try a newer kernel (from the same
>> repository, ti ubuntu integration).
>>
>> Enrico
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-- 
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Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
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