Strange crash with blinking cursor on blank terminal screen
This is a problem that I've had in the past but never checked for help on. I assumed it was a problem with my configuration in some way, but I recently reinstalled Slackware and the problem came back a few weeks after.
So what happens is, my display will be off for one reason or another (lid closed, screen intentionally locked, idle time, etc). When I open it back up, there's nothing but a blank screen with a blinking cursor in the top left corner. This happens no matter what I happen to have been doing before my screen blanked, but doesn't happen 100% of the time. It seems to only happen after I've been gone for the day, or if I close the lid, remove the power cable, and open the lid again, it's doing the same thing about 80% of the time.
I can't do anything except a hard reset. No errors show in the boot text, and I'm not sure where to look for error messages except for dmesg, which can't be accessed before the reboot and is useless to check afterwards. Memtest86+ shows no memory errors.
It went for a while without happening after my reinstall, but recently started again. I can't think of anything I've recently enough that might account for the problem, and it happens regardless of the WM I'm using.
I'm at work at the moment so I can't immediately check anything, but does anyone have any ideas about what might be occurring?