https://bugzilla.kernel.org/show_bug.cgi?id=51381
Christoph Haag haagch.christoph@googlemail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |haagch.christoph@googlemail | |.com
--- Comment #6 from Christoph Haag haagch.christoph@googlemail.com 2013-06-13 17:10:13 --- intel + radeon + vgaswitcheroo seems to have been problematic for quite some time: https://bugzilla.kernel.org/show_bug.cgi?id=23592
I'm using 3.10rc5.
While I have no problems with suspending or quitting X (didn't have problems with some earlier kernels either), I have had yet another problem for some time now. If I
start X with the radeon card enabled then disable the radeon card with vgaswitcheroo then switch to a tty then switch back to X
then X hangs and I get many messages like [ 236.688466] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 236.688470] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing D46E (len 62, WS 0, PS 0) @ 0xD48A
I assume the problem is still the same.
The most pressing issue is that X should not get stuck, no matter what. It's much better to reset the driver somehow, even if you lose 3d acceleration or so. As it is now, X eats all keyboard input and you have to use sysrq keys or reboot over ssh which is not really ideal.