[Bug 43829] Resuming my AMD A4-3300 based laptop leaves the screen black

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43829

--- Comment #33 from Jose P. <lbdkmjdf at sharklasers.com> ---
Created attachment 85691
  --> https://bugs.freedesktop.org/attachment.cgi?id=85691&action=edit
dmesg+Xorg.0.log

Same bug here...
HP laptop (dv6-6174la), dual GPU:
00:01.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] BeaverCreek [Radeon HD 6520G] [1002:9647] (prog-if 00 [VGA
controller])
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] [1002:6741]
(prog-if 00 [VGA controller])
Linux hostname 3.11.0-7-generic #13-Ubuntu SMP Tue Sep 10 20:55:38 UTC 2013
x86_64 x86_64 x86_64 GNU/Linux

workaround: use an external monitor (HDMI and VGA worked, with some problems
though, but that is unrelated [you can see some warning and backtraces] and
didn't happen before)

attached: whole dmesg, Xorg.0.log files after two consecutive suspend/resume
cycles plus some testing with external monitors, and .diff files (from other
session) showing messages logged only after suspend to RAM.

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