Created attachment 124333 [details]
disp error dump

With a GK208B (NV106) and GT215 (NVA3) [and NV34] plugged in, I went to run
warsow 2.1 with DRI_PRIME=1 (to offload onto the GT215). I got this error and a
hung display. 02:00:00 is the GK208 (which is where the monitor is connected):

02:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK208 [GeForce GT
730] [10de:1287] (rev a1)
04:00.0 VGA compatible controller [0300]: NVIDIA Corporation GT215 [GeForce GT
240] [10de:0ca3] (rev a2)
09:01.0 VGA compatible controller [0300]: NVIDIA Corporation NV34 [GeForce FX
5200] [10de:0322] (rev a1)

Note the "moving pinned object" note too - can't be good. This happened right
as I launched warsow, the picture left-over on the desktop was one of my
original desktop, shifted up by 16-32 pixels. (And I could see the original
bottom pixels duplicated.)