As mentioned in the [ARM Stable Update] 2021-03-09 update thread, I also have this issue. Rolling back is not an option for me. I leave the journalctl log hereso as to motivate further investigation of this problem
Mar 10 20:05:59 manjaro-arm systemd-logind[3681]: Power key pressed.
Mar 10 20:05:59 manjaro-arm phoc[3750]: [backend/drm/drm.c:971] Skipping pageflip on output 'DSI-1'
Mar 10 20:05:59 manjaro-arm gnome-session[3834]: gnome-session-binary[3834]: WARNING: Could not get session path for session. Check that logind is properly installed and pam_systemd i>
Mar 10 20:05:59 manjaro-arm gnome-session-binary[3834]: WARNING: Could not get session path for session. Check that logind is properly installed and pam_systemd is getting used at log>
Mar 10 20:06:00 manjaro-arm gsd-color[4007]: unable to get EDID for xrandr-DSI-1: unable to get EDID for output
Mar 10 20:06:00 manjaro-arm phoc[3750]: event2 - Goodix Capacitive TouchScreen: client bug: event processing lagging behind by 13ms, your system is too slow
Mar 10 20:06:05 manjaro-arm gnome-calls[4144]: gtk_application_uninhibit: assertion 'cookie > 0' failed
Mar 10 20:06:05 manjaro-arm gsd-usb-protect[4020]: Error calling USBGuard DBus to change the protection after a screensaver event: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknow>
Mar 10 20:06:06 manjaro-arm systemd-logind[3681]: Power key pressed.
Mar 10 20:06:06 manjaro-arm gsd-color[4007]: unable to get EDID for xrandr-DSI-1: unable to get EDID for output
Mar 10 20:06:08 manjaro-arm systemd-logind[3681]: Power key pressed.
Mar 10 20:06:08 manjaro-arm phoc[3750]: [backend/drm/drm.c:971] Skipping pageflip on output 'DSI-1'
Mar 10 20:06:08 manjaro-arm gsd-color[4007]: unable to get EDID for xrandr-DSI-1: unable to get EDID for output