The system will get to the Plymouth 'ubuntu' screen, load load, all dots filled, switches over to LightDM, but wait! No LightDM. :I Just a blank screen with that white cursor. Can't switch out to tty1-6 - not sure if the Ctrl-Alt-F1 is disabled in 14.04 or if its literally just locked down. If I change any files, I have access to the filesystem from my Windows 8 partition. That's it. :/
I only changed a few things recently, but don't know if one was a cause. I switched to the Numix theme (from PPA), installed lm-sensors and psensor (ran all the I/O probes), Ubuntu Tweak, Pinta, and well, Team Fortress 2 on Steam. :P
I'm not new to Linux, but this has me stumped. Any help would be greatly appreciated. Thanks!
UPDATE I was just able to get into my desktop briefly. I booted Ubuntu. When the black screen froze, I hit Ctrl-Alt-Del. It rebooted. I plugged the second monitor in I had been using before the issue ever came about. Plymouth displayed on both. LightDM came up, displayed on both (it used to show only the ubuntu logo on the unfocused monitor though). I logged in just fine. Even ran some pending software updates. I logged out of the desktop though, and LightDM refused to show again. xP
UPDATE Got in again. It's been giving me an error (for a couple weeks actually). Didn't really think it was related...
sdb:6:0:0:0: [sdb] Assuming drive cache: write through sdb:6:0:0:0: [sdb] Assuming drive cache: write through sdb:6:0:0:0: [sdb] Assuming drive cache: write through
...but I put two-and-two together, took out the SD card I always leave in the slot, rebooted, and it started up just fine. I obviously ran here to give an answer, but had a feeling I should reboot just to make sure. Good thing. It didn't let me in the second time. Same black screen, white cursor. '-_-)
UPDATE I just went through recovery mode, just installed gdm and switched over to that as my DM. For the heck of it, I ran plymouth in debug. My plymouth debug log