I appear to be having similar problems. I turned on the 'desktop-effects' stuff yesterday and it turns my machine into a brick after I login. I get some interesting 'Xid' messages in syslog (attached).
I already had problems with the screensaver kicking in and hanging the machine, and of late it appears usplash and these drivers have begun a catfight about resolutions, as usplash suddenly turns to blueish (kubuntu) snow halfway during boot. More worrying is that these crashes appear to be causing filesystem corruption. At first it was not clear to me what was happening but after such a crash I had some really odd behaviour that cleared up after running an fsck. (which found errors, I might add). ** Attachment added: "xid messages from syslog" http://librarian.launchpad.net/5388256/nvidia_syslog_xid_messages.log -- nvidia 1.0.9629 crashes X https://launchpad.net/bugs/74146 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
