I'm running Ubuntu 12.04 with lightdm and awesome window manager on a Macbook Pro 6,2 (nvidia and integrated Intel GPUs). I'm also using macfanctld and pommed, in case that's helpful.
My grub config uses "quiet novesa nopat", as I read that the latter two can sometimes interfere with the loading of graphics drivers later on during boot. Though, apparently it didn't.
Randomly, (last time was when opening an email message, another was opening a new tab in Chrome, etc.) my display will turn off. No input works, I can't change to another tty to shut down lightdm. I just have to do a hard reset of the computer. The keyboard backlight doesn't turn off, but the monitor backlight does seem to go away. The only other thing I notice is that after about 5 seconds, the fans start spinning at max speed.
I'm not sure if there's a consistent time between the crashes either. Last time it was 36 hours, another was 24. Last week it happened every hour, sometimes less. My friend told me this is a known problem with Radeon cards, but I don't have a Radeon.
Here are the final thoughts of the Xorg log file:
Is there a way to fix this?
I just noticed that the pastebin didn't nab the last two lines of the log, so I've pasted them below:
[103550.059] [mi] mieq is *NOT* the cause. It is a victim. [103551.489] (WW) NVIDIA(0): WAIT (2, 6, 0x8000, 0xdfff2fff, 0x00008470)
Some googling shows that this appears to have been reported as a bug in March:
But, is there anyway I can fix this, or do I have to be content with it crashing periodically?