I have the same problem on my work PC. Any time my monitor is put to sleep for inactivity, the video signal never returns within X. After the inactivity, I turn the monitor back on after it has shut off due to no signal, and moving the mouse/typing keys will not bring the signal back, monitor just says no signal. If I press ctrl+alt+f1 then I get a console and the monitor comes back to life. I have to restart lightdm (killing all my programs) to get back into X. dmesg only shows the following:
[4219918.274807] init: tty1 main process ended, respawning [4219923.733629] init: Failed to spawn hybrid-gfx main process: unable to execute: No such file or directory [4219924.646159] nvidia 0000:01:00.0: irq 49 for MSI/MSI-X -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1366165 Title: No hybrid GPU and this error appears: Failed to spawn hybrid-gfx main process: unable to execute: No such file or directory To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-drivers-common/+bug/1366165/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs