I recently upgraded to Kubuntu 18.04 (therefor to kernel 4.15.0-23). I can't suspend my computer anymore. However, booting on a previous kernel version still lets me suspend my computer.
This is what exactly happens when I hit on 'Suspend': System goes black, suspends (led blinking), awake by itself 1-2 seconds later.
Would you think there's an issue in the kernel? Is there any config/conflict issue ?
Thanks for your help!
Cheers,
Here are the logs:
journalctl -b | grep sleep
juil. 07 16:15:25 user-ubuntu NetworkManager[1016]: <info> [1530972925.7995] manager: sleep: sleep requested (sleeping: no enabled: yes)
juil. 07 16:15:25 user-ubuntu NetworkManager[1016]: <info> [1530972925.7996] device (wlp2s0): state change: disconnected -> unmanaged (reason 'sleeping', sys-iface-state: 'managed')
juil. 07 16:15:26 user-ubuntu systemd-sleep[6022]: Suspending system...
juil. 07 16:15:31 user-ubuntu kernel: ACPI: Preparing to enter system sleep state S3
juil. 07 16:15:31 user-ubuntu kernel: cache: parent cpu1 should not be sleeping
juil. 07 16:15:31 user-ubuntu kernel: cache: parent cpu2 should not be sleeping
juil. 07 16:15:31 user-ubuntu kernel: cache: parent cpu3 should not be sleeping
juil. 07 16:15:31 user-ubuntu kernel: ACPI: Waking up from system sleep state S3
juil. 07 16:15:31 user-ubuntu systemd-sleep[6022]: System resumed.
juil. 07 16:15:31 user-ubuntu systemd[1]: sleep.target: Unit not needed anymore. Stopping.
juil. 07 16:15:31 user-ubuntu systemd-logind[995]: Operation 'sleep' finished.
juil. 07 16:15:31 user-ubuntu NetworkManager[1016]: <info> [1530972931.6845] manager: sleep: wake requested (sleeping: yes enabled: yes)
journalctl -b | grep suspend
juil. 07 16:15:26 user-ubuntu kernel: PM: suspend entry (deep)
juil. 07 16:15:31 user-ubuntu kernel: Suspending console(s) (use no_console_suspend to debug)
juil. 07 16:15:31 user-ubuntu kernel: PM: suspend exit
juil. 07 16:15:31 user-ubuntu systemd[1]: suspend.target: Unit not needed anymore. Stopping.