Wrt. suspend there is no structural change between 15.04 and 15.10, in
both cases you were already using a direct kernel sleep without pm-utils
when you use the "K" menu.
This sounds like some kernel/driver bug which one of the pm-utils quirks
is working around. Can you please "cd /usr/lib/pm-utils/sleep.d" and do
the following:
1. Remove one of the quirks, with e. g. "sudo rm 99video".
2. Run "sudo pm-suspend" works; if it still works, go to the next quirk and
repeat step 1.
3. If pm-suspend starts to fail, you have identified the quirk.
Please respond here with the quirk you have identified, then we can
further drill down into the details. Thanks!
** Package changed: systemd (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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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
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