[Bug 68571] GPU lockup on AMD Radeon HD6850 with DPM=1

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=68571

joe.r.floss.user at gmail.com changed:

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                 CC|                            |joe.r.floss.user at gmail.com

--- Comment #73 from joe.r.floss.user at gmail.com ---
Hello,

This bug is still present on Debian unstable, I had it again yesterday; it
regularly happens when running FlightGear. It is also present in the
just-released jessie. It makes it a bit hazardous to run OpenGL software...

I am attaching the kernel log from yesterday's occurrence of the bug. My
graphics adapter is:

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV730
XT [Radeon HD 4670] (prog-if 00 [VGA controller])
        Subsystem: PC Partner Limited / Sapphire Technology Device e100
        Flags: bus master, fast devsel, latency 0, IRQ 50
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        Memory at fb9e0000 (64-bit, non-prefetchable) [size=64K]
        I/O ports at be00 [size=256]
        [virtual] Expansion ROM at fb900000 [disabled] [size=128K]
        Capabilities: [50] Power Management version 3
        Capabilities: [58] Express Legacy Endpoint, MSI 00
        Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010
<?>
        Kernel driver in use: radeon

Symptoms are: screen goes blank for a few seconds, reappears, goes blank again,
reappears garbled, alternates between blank and garbled a few times, and if I
don't reboot quickly enough, I seem to recall (not sure about this one) that
the whole system may crash in a way that requires a hard reset.

If there is something I can test to help solve this bug, please say so. I
wonder if there are graphics adapters with decent OpenGL support using free
drivers that don't suffer from this kind of bug...

Thanks

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