Comment 138 for bug 625239

I seem to have discovered a slightly new style of crashes, which I believe have only occurred when I have a modified /etc/init/gdm.conf file. Yesterday and today I've witnessed this new crash behavior with both:
* Seth's /etc/init/gdm.conf workaround from https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/532047/comments/91
* Steve's suggested test that I note in comment #130 (which didn't crash immediately, but did upon a second boot)

These are the characteristics of my "new" crash experience:
* Boots with X on tty7 and seems fine for a while.
* Crashes without keyboard cause (sometimes using mouse/click, one time doing nothing but waiting for IntelliJ IDEA to open).
* Crash to login screen, then X on tty8.
* After crash and relogin to tty8, usually another crash very quickly (again, not related to keyboard activity), which then moves X to tty9.
* After a crash, I'm unable to switch to any other tty--all show completely blank screen.

My original issue, which I can reproduce any time by simply keeping the original /etc/init/gdm.conf and /etc/default/grub in place, was unique to the above in the following ways:
* First boot always to tty1 or tty2 (usually tty2).
* Always crashed within an hour of working, when pressing Enter.
* Always on tty8 after second login, and never crashed again until a reboot.
* Both before and after a crash, I was still able to switch to other ttys with no problem.

The one workaround that seems to always work, to the best of my knowledge, is when I only add "vga=799" to the linux boot line, and change nothing else. I'm pretty sure I went days without a crash with Seth's gdm.conf tweak, so it was odd when it suddenly started crashing like crazy yesterday.