Since I upgraded from 10.04 to 10.10, I've been having problems switching between users. When I run
Logout > Switch User in X, the screen often stops updating and the keyboard stops responding to input (the LEDs don't update). Occasionally, switching users will work, but switching back often causes the same freeze. Switching to a text console also occasionally freezes the machine.
I've got onboard 865g Intel graphics card.
lspci -k tells me:
00:02.0 VGA compatible controller: Intel Corporation 82865G Integrated Graphics Controller (rev 02) Subsystem: IBM Device 0285 Kernel driver in use: i915 Kernel modules: i915
I don't know if it's related, but X doesn't always seem to update when the screen changes. When I hide Guake, the screen doesn't always update. I didn't have this problem before I upgraded.
How do I fix this?