Running ArchLinux and GNOME 3 on a Thinkpad X220.When I suspend my laptop it goes into sleep mode and the LED ring around the power button fades in and out.When a suspend fails, the LED ring and the screen is on but I can't do anything. My only recovery is to do a hard reset.This only happens 33 - 50% of the time within the last few months, but it never happened a year ago.How can I debug / fix this issue?Output from sudo journalctl --since=today | tac | sed -n '/-- Reboot --/{n;:r;/-- Reboot --/q;p;n;b r}' | tac:Mar 17 15:10:49 noa systemd-logind[349]: Suspend key pressed.Mar 17 15:10:49 noa NetworkManager[332]: <info> sleep requested (sleeping: no  enabled: yes)Mar 17 15:10:49 noa NetworkManager[332]: <info> sleeping or disabling...Mar 17 15:10:49 noa NetworkManager[332]: <info> (eth0): device state change: unavailable -> unmanaged (reason 'sleeping') [20 10 37]Mar 17 15:10:49 noa NetworkManager[332]: <info> (eth0): cleaning up...Mar 17 15:10:49 noa NetworkManager[332]: <info> (eth0): taking down device.Mar 17 15:10:50 noa NetworkManager[332]: <info> (wlan0): device state change: disconnected -> unmanaged (reason 'sleeping') [30 10 37]Mar 17 15:10:50 noa NetworkManager[332]: <info> (wlan0): cleaning up...Mar 17 15:10:50 noa NetworkManager[332]: <info> (wlan0): taking down device.Mar 17 15:10:50 noa systemd[1]: Starting Sleep.Mar 17 15:10:50 noa systemd[1]: Reached target Sleep.Mar 17 15:10:50 noa systemd[1]: Starting Suspend...Mar 17 15:10:50 noa dbus-daemon[353]: dbus[353]: [system] Rejected send message, 2 matched rules; type=method_return, sender=:1.1 (uid=0 pid=349 comm=/usr/lib/systemd/systemd-logind ) interface=(unset) member=(unset) error name=(unset) requested_reply=0 destination=:1.57 (uid=1000 pid=638 comm=gnome-session --session=xmonad )Mar 17 15:10:50 noa dbus[353]: [system] Rejected send message, 2 matched rules; type=method_return, sender=:1.1 (uid=0 pid=349 comm=/usr/lib/systemd/systemd-logind ) interface=(unset) member=(unset) error name=(unset) requested_reply=0 destination=:1.57 (uid=1000 pid=638 comm=gnome-session --session=xmonad )
Suspending laptop fails ~50% of the time
arch linux;power management;suspend;acpi;thinkpad