possible solutions/wokarounds: 1) https://bbs.archlinux.org/viewtopic.php?pid=1671675#p1671675 2) https://github.com/the-cavalry/light-locker/issues/108#issuecomment-502404552 (i have not tried these). (i use ctrl+alt+f6 then ctrl+alt+f7 as a workaround for now. )