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

--- Comment #5 from Jonathan Nieder <jrnie...@gmail.com> 2011-11-28 03:16:18 
PST ---
bugzilla-dae...@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

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