I encountered a similar problem on my desktop system running 11.04 with the nVidia proprietary driver. Using Intel DH55TC motherboard and nVidia GTS 450 OR nVidia 9800GT (tried both). For me, the issue was resolved through a motherboard firmware update.
https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics- drivers/+bug/733374/comments/73 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/882710 Title: [NVIDIA] Monitor(s) black out and session freezes. "NVRM: GPU at 0000:01:00.0 has fallen off the bus." To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers/+bug/882710/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
