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Old 03-12-2011, 05:50 PM
Raúl Sánchez Siles
 
Default Bug#614515: My experience.

Hello:

I've also came across this crash. I identified quite well that it was being
triggered by sid powertop (1.97-1), ie this doesn't happen when using squeeze
powertop. I suspect it's somehow related to "Runtime PM for PCI Device ...."
options.

According to the backtrace, it's a kernel drm bug, this piece of code is
complicated enough to not be trivial to debug and fix.

Latest kernel I checked this problem existed was on my custom build
2.6.37.2. I think it's doesn't happen exactly the same on 2.6.37.3, this is, I
didn't had the crash in the 2 tests I did, but I found that there was some
corruption somewhere in the graphics stack, not sure where, because I found
the X behaviour flaky after my tests.

Maybe the problem is fixed on 2.6.38. A RC of this kernel is already
available in experimental, any volunteers?

@Pedro: you have a subscribe link on the top of every bug report. In this
case it points to 614515-subscribe@bugs.debian.org

Regards,
--
Raúl Sánchez Siles
----->Proud Debian user<-----
Linux registered user #416098
 
Old 03-12-2011, 06:03 PM
Pedro Martínez Juliá
 
Default Bug#614515: My experience.

Ok, I'm now subscribed to the bug. Thank you.

About the bug, I can confirm that the failure is not deterministic and it can
be related to one or more of the improvements recommended by powertop, that
are now included with "pm-tools" package, but no-doubt, the problem is in the
kernel drm code. Also I saw a strange output of /proc/interrupts (garbage in
the end of the i915 line.




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