Tried disabling powernowd as Sitsofe suggested (turned it back on in the BIOS and edited the file).
Everything seems to be working fine... it's been up for about 21 hours with no issues. -- [nvidia-glx] system frequently locks up with white screen with black lines while nvidia restricted driver in use must hard boot system https://bugs.launchpad.net/bugs/109643 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