This is a problem that has persisted in more or less the same state across two different distributions (Debian and Mint), whether as a live boot or after installed to disk.
Essentially, GRUB comes up fine (after choosing a Linux partition/install media), but when I start Linux (either standard or recovery mode) neither monitor receives input. I've tried some solutions I've found via Google-fu (nomodeset, radeon.modeset=0, combining ctrl/alt/f-keys to get a terminal, etc.) but haven't had any success. I could probably try plugging one into the motherboard, but I'd like to be able to use the graphics card so I imagine that'll simply put off the problem. I'd guess it's some kind of issue with the graphics card or its driver, but I can't figure out what to do about that.
Here's some possibly relevant components of my computer - probably the graphics card is the only important part, but just in case:
- Graphics card: XFX Radeon R7 370
- CPU: AMD Athlon X4 860K
- Motherboard: Gigabyte GA-F2A88X-D3H
Other possibly relevant info: I'm going for a Windows/Linux Mint dual-boot on my SSD, with both having access to files on a larger HDD. I installed Windows 10 on this computer first, having heard that installing Linux first would cause Windows' installation to wipe GRUB.
Any and all help will be greatly appreciated.
EDIT: Okay, I'm becoming convinced that there is some really fundamental problem going on here. At school, I've asked graduate students and even one of my instructors for help figuring it out, and they seem fairly perplexed as well. I've tried Ubuntu with no results. Going to remove graphics card and plug monitor into motherboard, see if that works.
EDIT2: Well, I've now determined that my motherboard inexplicably won't provide any kind of video output, even when I've removed the graphics card and enabled integrated graphics in the UEFI. So that's great. Were it not for that, I imagine I could boot into Linux easily, hopefully figuring out what driver/modification/other inexplicable fix I'd need. Seems like every time I install Linux I'm confronted with a conflux of problems which either interfere with basic functionality or the ability to restore that basic functionality. Faulty human perception heuristic, I guess. I'll keep working.