[email protected] wrote:
>
> On Friday, 13 August, 2010 3:35pm, "Gilles Chanteperdrix"
> <[email protected]> said:
>
>> [email protected] wrote:
>>> I wonder if this is to do with graphics? I have set "NoAccel" in the
>>> driver section of Xorg.conf (I am using fbdev). I also notice that
>>> latencies go massive (e.g. 4200uS) the first time I run glxgears.
>>> "glxinfo" reports "Direct rendering: no".
>> This is bad news. It could come either from the fact that the Xorg
>> driver shuts hardware interrupts off (there is nothing xenomai can do
>> about that), or it could be an SMI issue. What about using the driver
>> for the real graphic card you have ? Probably intel card? Do you observe
>> any big latencies if you stress the system with anything else than X?
>>
>>> Power management options (ACPUI, APM): Disable ACPI (Advanced
>>> Configuration and Power Interface) Support --> Processor Disable CPU
>>> Frequency Scaling Disable CPU idle PM support Disable Power Managment
>>> Support
>> Disabling ACPI is a bad idea. As repeated many times, only
>> ACPI_PROCESSOR should be disabled, not ACPI.
>>
>
> Thanks for your helpful responses.
>
> I'm not working on this project again until next week, but on Friday I was
> able to
>
> o Recompile the kernel with ACPI enabled
> o Boot with the 'SMI handler' BIOS option set to disabled....
> according to the help text this option should be disabled if 'an RTOS
> is installed' - I presume this means that SMIs are completely disabled
> and therefore SMIs cannot be the source of the problem
> (very convenient BIOS option... now I begin to appreciate the expense of
> this board!)
> o Changed xorg to use the intel video driver
Now you can try NoAccel with the intel video driver too....
--
Gilles.
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