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

--- Comment #2 from Sandeep sandy.8925@gmail.com 2011-11-25 16:02:45 PST --- This happens for OpenArena as well.

Trine on the other hand works properly (on low detail)

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.