[Bug 63101] Hard lockup whel launching games like TF2 on kernels 3.11.5 and 3.12 rc4 and above if radeon.dpm=1 is used

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=63101

--- Comment #12 from Kertesz Laszlo <laszlo.kertesz at gmail.com> ---
(In reply to Alex Deucher from comment #11)
> (In reply to Kertesz Laszlo from comment #10)
> > This issue has to do with the radeon driver, because if i dont append
> > radeon.dpm=1 to the kernel boot options, TF2 launches even with latest 3.12
> > rc5+ kernel (but it has dismal performance).
> 
> If it was dpm specific you should have mentioned that.  Make sure your
> kernel has this patch:
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/
> ?id=4076a65544e2de310cbf4eaadb13ee15bbfaaf4f

Sorry about that. I have the dpm option there since it appeared, i totally
forgot about it - now i started the computer in single user mode which doesnt
have that option then i proceeded to runlevel 2. This way i saw this.

I have that patch, i have the linus kernel cloned from git (now at version
v3.12-rc5-123-g04919af). I even re cloned it recently.

Also please take a look at bug #62861 - it is related to the dpm code too.

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