How to debug X lockup (advice from gurus wanted)

Roberto Ragusa mail at
Tue Sep 6 21:14:01 UTC 2011

On 09/06/2011 01:18 PM, Reindl Harald wrote:
> Am 06.09.2011 13:10, schrieb Adam Jackson:
>> On 9/1/11 5:05 PM, Roberto Ragusa wrote:
>>> Hmmm, turning off SMP is not realistic, as this laptop has a Core 2 Duo.
>> Sure it is.  Boot with maxcpus=1 on the kernel command line
> i would recommend "nosmp" because it really disables the kernel-smp code

Ahem... what I meant is that it is not realistic for me to sacrifice
one of the CPUs just to hope to get more stability.

I intended the suggestion was "turn off SMP support if you have only
one CPU". Thinking about it, the kernel is already no-SMP on systems
with one CPU nowadays, right?

Anyway, the problem happened again one hour ago, so I just decided
to upgrade only the kernel to the one from F15 and hope for the best.
If it happens again, I will then upgrade Xorg and Mesa.

   Roberto Ragusa    mail at

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