A little while ago I started getting a black screen when resuming my computer from sleep. Suspension has been working fine for months but all of a sudden my computer gets completely unresponsive. I can't even switch to another tty. After a hard shutdown everything works fine, but the same behavior reappears after every suspend (
systemctl suspend). It actually looks like the screen doesn't turn on at all. It's not just blank but completely black.
I've checked boot.log, syslog and the systemd logs and I can't find anything that looks like any serious problem.
My computer is a Thinkpad Carbon X1 (with an Intel graphics card) and runs the mini.iso release of Ubuntu 17.10. I tried updating my kernel to
4.15.0 but no change. I even tried reinstalling my entire system (including not using Luks-encryption for my home directory) still no change. Now I'm back to the standard kernel version (
I'm really stumped here an have no idea where to look right now. I'd really appreciate some help!