Debian: No graphical display after hibernate
After a recent upgrade on debian bullseye (Debian 5.10.84-1 (2021-12-08)), I was unable to get a graphical display after resuming from hibernate. Though terminal login worked just fine. Seems like it's a problem with NetworkManager changing hostname. It will change it if the hostname variable is not set in configuration file. Following advice at https://bbs.archlinux.org/viewtopic.php?pid=684936#p684936 , I added following two lines in /etc/NetworkManager/NetworkManager.conf [keyfile] hostname = <your hostname>