Boot hangs on Purple screen
I suspect this is a graphics problem. This has happened through several Ubuntu revisions, so not a Unity issue. This is not my primary desktop so I've always just used this work around. I manually select 2nd kernel option (Recovery Mode) and it goes to the Recovery Menu. I simply select the 1st option, Resume Normal Boot and it boots up just fine. But if I don't select anything in Grub or select the normal kernel it promptly hangs on a plain purple screen. My mouse light goes off and the keyboard keys don't respond (not even caps lock for example). I have to hard boot to get back to grub so I can select Reocovery Mode. I rarely use my Ubuntu desktop (most of my work is in RHEL command-line non-gui servers), so it's never been a big deal to just use the work around when booting up, but I figured I would throw it out there for help in troubleshooting so that the default kernel will boot normally.
(also inside the Display option, clicking "Detect Displays", doesn't appear to do anything at all. Should I get a pop-up?)
Let me know what commands I can run or what logs/config files you would like to see. I can post anything from dmesg. I can confirm once inside the GUI, the Display option thinks I'm a laptop (it is not). The GUI also says my video card is a VESA: Matrox P650/P750. Not sure if this is correct or not. The highest resolution I can display is 1024x768. I know my Planar PL1910M can go much higher than this as I run a windows box on it that does 1280x1024 quite easily. I'm sure this might be a driver issue, but don't want to troubleshoot this part quite yet. Just want the first kernel option (when the countdown timer times out), to be able to boot up properly just like Recovery Mode seems to do just fine.
Running: Ubuntu 12.04.1 LTS Kernel 3.2.0-36-generic i686
Update Manager says I'm fully updated.
Let me know what to try. Very comfortable on the command-line, just don't know much about the graphics or gui side of things.