Re: Trying to make headway into finding the Xid crashes source...
1, 2, 8, 13, 17 and 23 are my Xid numbers under X.org 6.8.1.
2 happens only if I kill an fullscreen OpenGL app from another VT and then switch to X (to VT7).
8 is always present in case of crash.
17 doesn't lead to crash (in my case).
23 is in the case of freeze during gameplay (just random crash).
13 and 1 occur exceptionally.
23 followed by 8 is the most frequent combination.