Tier: Installing the official drivers tends to be a one way thing. Once the official drivers are installed files can wind up being changed that then prevent the Ubuntu NVIDIA binary drivers from working again. Getting back the system back to a state where the Ubuntu NVIDIA binary drivers do work is often very hard because of the manual changes made (and the process of reverting the official drivers beyond the remit of the launchpad bug area). Left over pieces of the official binary drivers may also explain the "NVRM: RM/client version mismatch!!" error message you gave. As mentioned before http://www.nvnews.net/vbulletin/forumdisplay.php?f=14 and http://www.ubuntu.com/support/communitysupport are the places to go for support now you've switched to the official drivers and be aware of the drawbacks mentioned in the "Kernel and Mesa Updates" section of https://help.ubuntu.com/community/NvidiaManual . Good luck!
Closing report. ** Changed in: linux-restricted-modules-2.6.20 (Ubuntu) Status: Incomplete => Invalid -- nvidia fails to start after recent upgrade of linux-restricted-modules-* and nvidia-* https://bugs.launchpad.net/bugs/123040 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs