Thanks for the backtrace Robbie, that helps pinpoint where things are
failing. The failure seems to be happening in the kernel itself. The
last point it is in X-land is with this stanza of code:
case ACTION_SWITCHSCREEN_PREV:
if (VTSwitchEnabled && !xf86Info.dontVTSwitch && xf86Info.vtno > 0) {
if (ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno - 1) < 0)
ErrorF("Failed to switch consoles (%s)\n", strerror(errno));
}
break;
The ioctl calls into the kernel from there, but we have no further debug
info as to what it's doing there:
#0 0xb7fdc424 in __kernel_vsyscall ()
No symbol table info available.
#1 0xb7c6ad59 in ioctl () from /lib/tls/i686/cmov/libc.so.6
No locals.
Some things I can rule _out_:
1. "*ERROR* trying to get vblank count" - it sounds bad, but is a
common warning unrelated to this issue
2. In the second backtrace there is a "*** glibc detected ***" bit - I
think this portion of the crash is actually just bug #328035 (which was
causing a lot of glibc X failures all over the place). It is now fixed
(post-beta) in xorg-server (2:1.6.0-0ubuntu5)
3. The crash on switching user is a different bug not related to this.
** Package changed: xserver-xorg-video-intel (Ubuntu Jaunty) => linux
(Ubuntu Jaunty)
** Changed in: linux (Ubuntu Jaunty)
Status: Triaged => New
--
[iGM45] X exits when switching ttys on 2.6.3 unless NoAccel used
https://bugs.launchpad.net/bugs/345714
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