It also affects me for a while (on gusty, hardy, ...).
Always with compiz enable.
On my two laptops:
nvidia for the first:
glxinfo
name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4
ati for the second.
fglrxinfo
display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Mobility Radeon X1700
OpenGL version string: 2.1.8087 Release
It also affects me for a while (on gusty, hardy, ...).
Always with compiz enable.
On my two laptops:
nvidia for the first:
glxinfo
name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: NVIDIA Corporation
server glx version string: 1.4
ati for the second.
fglrxinfo
display: :0.0 screen: 0
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: ATI Mobility Radeon X1700
OpenGL version string: 2.1.8087 Release
I will try to get more info (backtraces)