[Bug 29445] Linux 2.6.34 kernel Radeon KMS driver freezes my computer sometimes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=29445

--- Comment #7 from 0453411800 at netti.fi 2010-08-10 11:11:45 PDT ---
A little update... I've tried out all the different kernel options that I could
think of as well as enable USB debugging output, usb_storage debugging output,
ATA system debugging output, SCSI debugging output, Magic SysRq, but I can't
get any reasonable traces out. The symptoms are very predictable, however. I
had thought it might be same bug as
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/509273?comments=all
however setting pci=nomsi does not help at all in my case.

In brief: If I'm using USB for e.g. external hard disk or mobile phone internet
dialup, or if I play audio, and then switch to the X output with KMS
modesetting enabled, either immediately or after a short while (a minute or
so), all the USB devices stop working. Sometimes, the whole computer freezes
and nothing works any more (not even the console or the Magic SysRq keys). If I
disable KMS for the radeon driver, everything is working fine. I'm not doing
any fancy things such as software suspend or hibernate.

Well... if there's some way I can provide better output to help identify the
cause of this problem, let me know, thanks!

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