Xorg crashed with SIGSEGV in XIChangeDeviceProperty() when pressing "disable touchpad" hardware-button multiple times

[Linus C Unneback]

X crashed and I dropped back to the GDM loginscreen when i pressed the hardware-button to disable the touchpad. I think something is broken in the XIChangeDeviceProperty() because:

1) When I log in my touchpad stops working (it works in GDM). The light indicating touchpad status is white (indicating it should work).
2) When I press the disable touchpad button the light turns orange, indicating it shouldn't work, which it doesn't.
3) When I press the button again the light turns white but I still can't use it.
4) I press again and the light turns orange, trying to move the cursor does nothing.
5) At last, when I press the button again the light turns white and this time I can use my touchpad.
6) If i press the button again I'm going thru the process from step 2 to 5 again.

X crashed when I had repeated 2-5 a numerous times, it happend while I was figuring out the behaviour of my "broken" touchpad.

$ lsb_release -rd
Description: Ubuntu lucid (development branch)
Release: 10.04

ProblemType: Crash
Architecture: amd64
Date: Fri Mar 26 17:57:48 2010
DistroRelease: Ubuntu 10.04
DkmsStatus:
 virtualbox-ose, 3.1.4, 2.6.32-17-generic, x86_64: installed
 virtualbox-ose, 3.1.4, 2.6.31-20-generic, x86_64: built
 virtualbox-ose, 3.1.4, 2.6.32-16-generic, x86_64: installed
 nvidia-current, 195.36.15, 2.6.32-17-generic, x86_64: installed
 nvidia-current, 195.36.15, 2.6.32-16-generic, x86_64: installed
ExecutablePath: /usr/bin/Xorg
MachineType: Hewlett-Packard HP Pavilion dv7 Notebook PC
NonfreeKernelModules: nvidia
Package: xserver-xorg-core 2:1.7.6-1ubuntu1
ProcCmdLine: root=UUID=a41a44bb-5f43-4074-91bb-695dc3aa1260 ro quiet splash
ProcCmdline: /usr/bin/X :0 -nr -verbose -auth /var/run/gdm/auth-for-gdm-wIxb67/database -nolisten tcp vt7
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
ProcVersionSignature: Ubuntu 2.6.32-17.26-generic 2.6.32.10+drm33.1
SegvAnalysis:
 Segfault happened at: 0x7f781bcf2063: mov 0x1d0(%r12),%rdi
 PC (0x7f781bcf2063) ok
 source "0x1d0(%r12)" (0x000001d0) not located in a known VMA region (needed readable region)!
 destination "%rdi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: nvidia-graphics-drivers
StacktraceTop:
 ?? ()
 XIChangeDeviceProperty ()
 ?? ()
 ?? ()
 _start ()
Title: Xorg crashed with SIGSEGV in XIChangeDeviceProperty()
Uname: Linux 2.6.32-17-generic x86_64
UserGroups:

dmi.bios.date: 02/06/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.26
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 30F4
dmi.board.vendor: Compal
dmi.board.version: 99.98
dmi.chassis.type: 10
dmi.chassis.vendor: Compal
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.26:bd02/06/2009:svnHewlett-Packard:pnHPPaviliondv7NotebookPC:pvrF.26:rvnCompal:rn30F4:rvr99.98:cvnCompal:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv7 Notebook PC
dmi.product.version: F.26
dmi.sys.vendor: Hewlett-Packard
system:
 distro: Ubuntu
 codename: lucid
 architecture: x86_64
 kernel: 2.6.32-17-generic

[Apport retracing service (apport)]

StacktraceTop:
 SetProperty (dev=<value optimized out>,
 XIChangeDeviceProperty ()
 ?? ()
 ?? ()
 _start ()

[dino99 (9d9)]

That version is no more supported; please open a new bug report if the actual archive found version also has the same issue.