X crashes on lid events

[aent]

After upgrading from Dapper to Edgy on my laptop (Dell Inspiron 8100), when I close my laptop, X crashes and restarts.

/var/log/Xorg.0.log:
ProcXCloseDevice to close or not ?

Backtrace:
0: /usr/X11R6/bin/X(xf86SigHandler+0x81) [0x80c38e1]
1: [0xffffe420]
2: /lib/tls/i686/cmov/libc.so.6(__strtoul_internal+0x3f) [0x489047df]
3: /usr/X11R6/bin/X [0x80e5997]
4: /usr/X11R6/bin/X(xf86HandlePMEvents+0x3b) [0x80d25bb]
5: /usr/X11R6/bin/X(xf86Wakeup+0x153) [0x80c4d93]
6: /usr/X11R6/bin/X(WakeupHandler+0x59) [0x808a599]
7: /usr/X11R6/bin/X(WaitForSomething+0x1b9) [0x81943d9]
8: /usr/X11R6/bin/X(Dispatch+0x82) [0x8086802]
9: /usr/X11R6/bin/X(main+0x485) [0x806e715]
10: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xdc) [0x488ec8cc]
11: /usr/X11R6/bin/X(FontFileCompleteXLFD+0xa1) [0x806da51]

Fatal server error:
Caught signal 11. Server aborting

dmesg also produces this line:
[17188317.248000] video bus notify

Please let me know if any other information is needed or anything to try.

[John Vivirito (gnomefreak)]

Thank you for your bug report. Can you please attach /var/log/Xorg.0.log and /etc/X11/xorg.conf files to this bug to better help us find the issue?

[aent (aent)]

attaching requested information...

[Vassilis Pandis (pandisv)]

Does this happen with the 'nv' driver as well ?

[aent (aent)]

Yes, changed driver from nvidia to nv and it still happens...

I did some more experimenting and I stopped acpid and closed the lid, it didn't crash, so I started it back up again, and the lid works properly. I restart the computer and its broken again. Restarting acpid and acpi-support after X is started seems to prevent it from crashing. It also produces this in Xorg.0.log:
(WW) Open ACPI failed (/var/run/acpid.socket) (Connection refused)

So I looked at /var/log/acpid and it looks like lid.sh is returning with status 1 (which means failure?) a bunch of times? But the first couple of lid closes also return a 0, so I don't know what to make of it. I attached /var/log/acpid

Any ideas of what to try to figure out why its failing?

[aent (aent)]

Just to clarify, it also happens both on lid open and lid close, so it must be some code that is executed on both events... any ideas?