[Bug 43248] Starting teeworlds results in black screen

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=43248

BDM <bjorn.de.meyer@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|minor                       |normal
           Priority|medium                      |high

--- Comment #3 from BDM <bjorn.de.meyer@gmail.com> ---
I'm having the same problem with the same dmesg output with the same chipset
HD6520 for any game that sets true full screen graphics mode on Ubuntu 12.10.
If I use a game, like Titanion, that can be closed by simple keystrokes, I can
manage to escape the black screen and get back to my normal desktop. 

Also perhaps unrelated, setting to a lower resolution desktop mode 800x600, or
lower seems to set an incorrect mode that garbles the screen. That too I can
escape if I have an xrandr ready to enable me to do so. 

Here's uname -a

Linux falcon 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64
x86_64 x86_64 GNU/Linux

Relevant part of dmesg
[  681.224351] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than
5secs aborting
[  681.224364] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing
E2F6 (len 2585, WS 4, PS 4) @ 0xE9E0
[  681.259083] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery reached max
voltage
[  681.259095] [drm:radeon_dp_link_train_cr] *ERROR* clock recovery failed

I think the driver is partially broken for this chipset.

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