>> >>Thanks to him, a guy (kozaki) has done thorough research (see 1&2) to >>solve this problem. It is caused by a failed attempt to restore the LCD >>backlight at boot. Passing 'systemd.restore_state=0' kernel parameter at >>boot is a solution. >> >>1) https://bugs.archlinux.org/task/47509 >>2) https://bbs.archlinux.org/viewtopic.php?id=201523&p=2
Hilarious thread here, appears to be a very old issue https://bugzilla.redhat.com/show_bug.cgi?id=1253523 Thanks for finding the solution.