Re: [Xenomai-help] WG: Xenomai 2.5.X - 32 bit X86 is not running on newer Kernel Versions

[Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>]

On 05/13/2011 02:36 PM, Benner Bernd (MH/EES) wrote:
> Hi,
> 
>   i am using a old grub grub-0.97. There is no problem with booting or early printk messages. The xenomai services and the linux system including X11- Desktop is starting very well.
>   The system is frozen after the creation of the first real time task in user mode. ( latency,clocktest etc. )
> 
>   We are using a Tinycore 3.x Live Linux distribution for our system which runs originally with a Kernel 2.6.33. ( but there
> is no X86-ADEOS patch for this Kernel ) I have test kernel 2.6.34.5 and 2.6.35.13 and kernel 2.6.37.6.
>   Kernel 2.6.37 do not work with tinycore ( probable UDEV- problems ).
>   Systems 2.6.34 and 2.6.35 are working. The ADEOS/Xenomai patched versions are working very well, if nobody starts a realtime
> thread.
> 
>   Here is my Kernel config for Kernel 2.6.35.13, xenomai-2.5.6
> 
>   When I debug the xenomai latency application the system freeze happens after activation of the display task.
> The display task reports the warming up message. The system is frozen before the latency task is created.
> 
> 
> Mit freundlichen Grüßen / Best Regards
> Bernd Benner
> MH/SGT3
> moehwald
> Bosch Group
> Moehwald GmbH
> Michelinstraße 21
> 66424 Homburg
> GERMANY
> www.moehwald.de
> b.benner@domain.hid
> Moehwald GmbH, Sitz/Registered Office: Homburg/Saar, Zentrales Handelsregister/Registered Court: Saarbrücken HRB 2812
> Geschäftsführung/Managing Directors: Jens Last, Wolfgang Geenen
> 
> 
> -----Ursprüngliche Nachricht-----
> Von: Gilles Chanteperdrix [mailto:gilles.chanteperdrix@xenomai.org]
> Gesendet: Freitag, 13. Mai 2011 12:43
> An: Benner Bernd (MH/EES)
> Cc: xenomai@xenomai.org
> Betreff: Re: [Xenomai-help] Xenomai 2.5.X - 32 bit X86 is not running on newer Kernel Versions
> 
> On 05/13/2011 11:55 AM, Benner Bernd (MH/EES) wrote:
>> Hi,
>>
>>    we have a well running X86 Realtime system with Kernel 2.6.29 and
>> xenomai-2.4.10. The system is able to boot from a stick and runs on
>> all our computers.
>> To fix some X11- problems with newer graphic chipsets, we try to
>> upgrade to a newer Kernel version.
>>
>>    We are starting with Kernel 2.6.34.5 and xenomai-2.5.5.2 using the
>> latest ADEOS-patches. This system works on some test machines, but on
>> some Core 2 Duo 3 GHz systems with Intel Desktop Chipset ( Lenovo and
>> HP
>> ) the system freeze and/or produces strange console outputs ( only
>> line feeds ) after a start of latency or clocktest.
>> We are not able to get a kernel log from this systems.
>>
>>   All permutations of Kernel 2.6.34.5, Kernel 2.6.35.13,
>> xenomai-2.5.3, xenomai-2.5.5.2, xenomai-2.5.6 has the same problems on
>> the Core 2 Duo 3 GHz machines.
>> On other machines with slower Mobile Core 2 Duo or Pentiom M
>> processors the system runs or has sometimes the same problem.
>>
>>   I have try some changes in the Kernel configuration, without any
>> success.  I have also try a combination of Kernel 2.6.35.13. and
>> xenomai-2.4.10 with some changes in the xenomai headers to run with
>> newer Kernels. This version has the same problem on the Core 2 Duo 3
>> GHz systems.
>>
>>   Is there any way to find the reason of this problems with Xenomai
>> 2.5.X and newer Kernels 2.6.3X with 32 bit X86 or has anybody similar
>> problems fixed.
> 
> Have you tried with something more recent than 2.6.34? We had a problem revealed by grub2, I do not remember which version fixed it. Otherwise, you have to enable early printk and redirect the console to serial port or netconsole, in order to capture it from another computer. Without these logs, there is not much we can do.

If you want to see the logs:
- remove quiet from the kernel command line, if the bootloader passes it
- do not launch X, run in console, or enable serial console, netconsole,
and capture the output from another computer.

-- 
					    Gilles.