[Bug 43278] System hangs after suspend to ram or disk cause radeon firmware cannot be loaded.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43278

--- Comment #6 from Rolf <hubba at online.de> 2011-11-28 05:44:48 PST ---
On 28.11.2011 12:16, bugzilla-daemon at freedesktop.org wrote:
> https://bugs.freedesktop.org/show_bug.cgi?id=43278
>
> --- Comment #5 from Jonathan Nieder<jrnieder at gmail.com>  2011-11-28 03:16:18 PST ---
> bugzilla-daemon at freedesktop.org wrote:
>
>> - hibernate test works very fine 3 times in follow
>> - after load of radeon module, system hangup on first hibernate test
> Great.
>
> Hopefully someone knowledgeable can step in to figure out why the
> radeon device is failing to hibernate.
>
> Aside from diving into the source and writing patches to confirm
> guesses about what's happening, the only trick I can think of is to
> try passing "drm.debug=0x6" and "no_console_suspend" as parameters on
> the kernel command line and hibernate to provoke the hang, capturing
> messages either using netconsole[1] or by taking a photograph of the
> screen if it stays up long enough.
>
> You mentioned before that suspend-to-RAM always works the first time
> you try it, and not the second.  Please attach full output from
> "dmesg" after booting and suspending successfully (to RAM or disk is
> not so important to me) with the radeon driver loaded and kernel
> parameter drm.debug=0x6 (and no_console_suspend if it happens to have
> been passed; it's not too relevant here).
>
> Thanks for your help and patience,
> Jonathan
>
> [1] http://www.kernel.org/doc/Documentation/networking/netconsole.txt
>
Attached the dmesg output after successful first suspend to ram.
When the system hangs up there is no output on the screen - after some 
seconds the screen turns to power safe mode and the power led of the 
notebook does not start  to blink as normally in sleep mode but keeps on 
burning - and the system does not react any longer to mouse or keyboard 
action - and that's it - not output.
When trying the "drm.debug=0x6" and "no_console_suspend" parameters the 
system sometimes didn't hangup on hibernate test - the test worked 3 
times in follow without hangup.
And second suspend to disk with the two parameters did not really 
suspend - the power led continued to burn as described above - and the 
screen turned to power safe mode - but after a second or two the screen 
powered up again and showed the login screen of suspend mode.
But this could not be reproduced constantly - strange!

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