After upgrade to kubuntu 12.10. I've got new bug: after random time playing quakelive my usb mouse and keyboard input just dies. No caps lock blink and any mouse input. Quakelive continue to go untill match ends (all graphics continue to go), and then ql totally freezes on nextmap vote screen. I tried to explore this bug,connect to my pc via ssh, but haven't found any suitable outupt in /var/log/ (Xorg, syslog). The only solution to unfreeze my PC is to remotely kill -9 X process. After that display manager(lightdm) restarts with login screen, all input works etc. Any assumption why it happend? Will provide any additional information. Thank you!