From mboxrd@z Thu Jan  1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 68571] GPU lockup on AMD Radeon HD6850 with DPM=1
Date: Sat, 01 Feb 2014 15:24:22 +0000
Message-ID: <bug-68571-2300-VNsaXBTJuz@https.bugzilla.kernel.org/>
References: <bug-68571-2300@https.bugzilla.kernel.org/>
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https://bugzilla.kernel.org/show_bug.cgi?id=68571

--- Comment #21 from Alexandre Demers <alexandre.f.demers@gmail.com> ---
(In reply to perry3d from comment #18)
> You are right, its not PCIExpress 2.0 vs. 3.0. I forced it in the bios, no
> improvment.
> 
> I also tried the drm-next-3.14 branch from Alex repository. Made it even
> worse: freeze on boot. Before i reached kdm and sometimes i saw the desktop.
> 
> After applying the patch from
> https://bugzilla.kernel.org/show_bug.cgi?id=68571#c5 i am on the same
> behaviour like i was with stock kernel 3.13.
> 
> I discovered that there is no kernel panic. I can get back to KDM with the
> SysRQ keys (Alt + Print + K).
> 
> Maybe its because my card is slightly overclocked by the factory:
> http://msi.com/product/vga/R6870-Hawk.html (in compare with the reference
> card: 930Mhz vs 900Mhz).
> 
> Something else i can do?

I may be wrong here, but I think that for now (which is something I worked with
Alex Deucher in a different bug), overclocked cards are being limited to the
reference values.

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