> Could this failure be related to bug report #1509868 I'm afraid I don't know enough about the kernel and graphics drivers to tell.
Thanks for eliminating the pm-utils suspend quirks as a possible cause. If "sudo systemctl suspend" by itself works, then we need to find out what the K menu does differently. I suppose what it does is to enable the screen lock, thus some graphical actions, before it requests suspend. As your system suffers from these long hangs in the graphics driver in these cases, it's plausible that the suspend attempt gets aborted by the kernel due to that. But I'm afraid this needs the expercise of the kernel/DRI/Xorg developers. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1509903 Title: After sleeping or hibernating via the K Menu options, the computer suddenly powers on again by itself, some seconds later, in Kubuntu 15.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1509903/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
