X crashes on first touchpad touch

[u-foka]

Binary package hint: xserver-xorg-input-synaptics

After installing today's updates for natty and rebooted.
My X crashes every time I touch my touchpad immediatelly, and starts over with the gdm login screen.

The relevant (I think) part of the Xorg.0.log:
[ 144.731]
Backtrace:
[ 144.731] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80eaa9b]
[ 144.731] 1: /usr/bin/X (0x8048000+0x5faa8) [0x80a7aa8]
[ 144.731] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb787440c]
[ 144.731] 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0xb4dfc000+0xa482) [0xb4e06482]
[ 144.731] 4: /usr/lib/xorg/modules/input/synaptics_drv.so (0xb4dfc000+0xa702) [0xb4e06702]
[ 144.731] 5: /usr/lib/xorg/modules/input/synaptics_drv.so (0xb4dfc000+0xabb9) [0xb4e06bb9]
[ 144.731] 6: /usr/lib/xorg/modules/input/synaptics_drv.so (0xb4dfc000+0x6722) [0xb4e02722]
[ 144.732] 7: /usr/bin/X (0x8048000+0x6b3bf) [0x80b33bf]
[ 144.732] 8: /usr/bin/X (0x8048000+0x12dd16) [0x8175d16]
[ 144.732] 9: (vdso) (__kernel_sigreturn+0x0) [0xb7874400]
[ 144.732] 10: /usr/bin/X (0x8048000+0x27ede) [0x806fede]
[ 144.732] 11: /usr/bin/X (0x8048000+0x1a7ec) [0x80627ec]
[ 144.732] 12: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0xb758be37]
[ 144.732] 13: /usr/bin/X (0x8048000+0x1a3e1) [0x80623e1]
[ 144.732] Segmentation fault at address (nil)
[ 144.732]
Caught signal 11 (Segmentation fault). Server aborting

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xserver-xorg-input-synaptics 1.3.99+git20110116.0e27ce3a-0ubuntu9
ProcVersionSignature: Ubuntu 2.6.38-7.39-generic-pae 2.6.38
Uname: Linux 2.6.38-7-generic-pae i686
NonfreeKernelModules: nvidia
Architecture: i386
Date: Fri Apr 1 12:00:32 2011
DistroCodename: natty
DistroVariant: ubuntu
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110327)
ProcEnviron:
 LC_TIME=hu_HU.UTF-8
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: xserver-xorg-input-synaptics
UpgradeStatus: No upgrade log present (probably fresh install)
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu1

[mlaverdiere (mlaverdiere)]

Same thing here after latest Natty updates. I'll try to gather and provide more info.

[Alexander Bjerkan (alexanbj)]

Experienced the same after updating an hour ago. If I try to use the touchpad or it's mouse buttons I am returned to GDM. I can however use the trackpoint with it's mouse buttons without problems.

[Matthew Paul Thomas (mpt)]

This is with xserver-xorg-input-synaptics-dev installed.

[Chase Douglas (chasedouglas)]

It's a pretty simple NULL pointer dereference. I've added a check for the pointer before the usage to fix it. The fix will be uploaded shortly.

[u-foka (ufooka)]

Thanks for the quick fix :)

[Launchpad Janitor (janitor)]

This bug was fixed in the package xserver-xorg-input-synaptics - 1.3.99+git20110116.0e27ce3a-0ubuntu10

---------------
xserver-xorg-input-synaptics (1.3.99+git20110116.0e27ce3a-0ubuntu10) natty; urgency=low

  * Ensure touch mask exists before clearing it (LP: #747126)
 -- Chase Douglas <email address hidden> Fri, 01 Apr 2011 08:40:59 -0400

[John S. Gruber (jsjgruber)]

Work-around:
If, like me, you have difficulty not touching the touchad while you type, you can use xinput to disable it:

xinput --list

and find the id of the touchpad. Say it is 12:

xinput set-prop 12 "Device Enabled" 0

[Martin-Éric Racine (q-funk)]

Downloaded straight from LP and installed using gdebi. Does the job just fine. Thanks!

[D. Laszlo Sitzer (lazlo101)]

Sorry for asking such a stupid question but where can i get the fixed release? i already added the x-swat PPA repo to my sources and now i have 1.3.99+git20110116.0e27ce3a-0ubuntu9. there should be a release ending with ...ubuntu10 somewhere, right?

[mu3en (mu3en)]

the update came through automatically from v9->v10, no additional repos, working fine again. thanks guys.

[John S. Gruber (jsjgruber)]

That's a perfectly reasonable question, Daniel.

Thanks to Chase, it is going to the main natty repositories, no need for a PPA. It has already been published at http://us.archive.ubuntu.com/ubuntu/pool/main/x/xserver-xorg-input-synaptics/ and should
be headed to all of them shortly (maybe it has already propagated fully).

I was able to install by running update-manager a few minutes ago without doing anything special.

[knorr (a-sokolov)]

didn't fixed for me (latest updates installed)

[knorr (a-sokolov)]

sorry, fixed after enabling "updates" repos

[Oscar Tiderman (oscar-tiderman)]

Fixed the crash but broke two finger scrolling for me

[Joshua Wiedekopf (jpwiedekopf)]

Thaks, the fix worked perfectly.
Two fingered scrolling works for me.

[jaapaap (f-nietsje)]

Worked for me too. tnx!

> Date: Sat, 2 Apr 2011 18:59:55 +0000
> From: <email address hidden>
> To: <email address hidden>
> Subject: [Bug 747126] Re: X crashes on first touchpad touch
>
> Thaks, the fix worked perfectly.
> Two fingered scrolling works for me.
>
> --
> You received this bug notification because you are a direct subscriber
> of a duplicate bug (747174).
> https://bugs.launchpad.net/bugs/747126
>
> Title:
> X crashes on first touchpad touch
>
> Status in “xserver-xorg-input-synaptics” package in Ubuntu:
> Fix Released
>
> Bug description:
> Binary package hint: xserver-xorg-input-synaptics
>
> After installing today's updates for natty and rebooted.
> My X crashes every time I touch my touchpad immediatelly, and starts over with the gdm login screen.
>
> The relevant (I think) part of the Xorg.0.log:
> [ 144.731]
> Backtrace:
> [ 144.731] 0: /usr/bin/X (xorg_backtrace+0x3b) [0x80eaa9b]
> [ 144.731] 1: /usr/bin/X (0x8048000+0x5faa8) [0x80a7aa8]
> [ 144.731] 2: (vdso) (__kernel_rt_sigreturn+0x0) [0xb787440c]
> [ 144.731] 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0xb4dfc000+0xa482) [0xb4e06482]
> [ 144.731] 4: /usr/lib/xorg/modules/input/synaptics_drv.so (0xb4dfc000+0xa702) [0xb4e06702]
> [ 144.731] 5: /usr/lib/xorg/modules/input/synaptics_drv.so (0xb4dfc000+0xabb9) [0xb4e06bb9]
> [ 144.731] 6: /usr/lib/xorg/modules/input/synaptics_drv.so (0xb4dfc000+0x6722) [0xb4e02722]
> [ 144.732] 7: /usr/bin/X (0x8048000+0x6b3bf) [0x80b33bf]
> [ 144.732] 8: /usr/bin/X (0x8048000+0x12dd16) [0x8175d16]
> [ 144.732] 9: (vdso) (__kernel_sigreturn+0x0) [0xb7874400]
> [ 144.732] 10: /usr/bin/X (0x8048000+0x27ede) [0x806fede]
> [ 144.732] 11: /usr/bin/X (0x8048000+0x1a7ec) [0x80627ec]
> [ 144.732] 12: /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0xb758be37]
> [ 144.732] 13: /usr/bin/X (0x8048000+0x1a3e1) [0x80623e1]
> [ 144.732] Segmentation fault at address (nil)
> [ 144.732]
> Caught signal 11 (Segmentation fault). Server aborting
>
> ProblemType: Bug
> DistroRelease: Ubuntu 11.04
> Package: xserver-xorg-input-synaptics 1.3.99+git20110116.0e27ce3a-0ubuntu9
> ProcVersionSignature: Ubuntu 2.6.38-7.39-generic-pae 2.6.38
> Uname: Linux 2.6.38-7-generic-pae i686
> NonfreeKernelModules: nvidia
> Architecture: i386
> Date: Fri Apr 1 12:00:32 2011
> DistroCodename: natty
> DistroVariant: ubuntu
> InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110327)
> ProcEnviron:
> LC_TIME=hu_HU.UTF-8
> LANGUAGE=en_US:en
> PATH=(custom, user)
> LANG=en_US.UTF-8
> SHELL=/bin/bash
> SourcePackage: xserver-xorg-input-synaptics
> UpgradeStatus: No upgrade log present (probably fresh install)
> version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.1-0ubuntu3
> version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu1
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-synaptics/+bug/747126/+subscribe

[xgong (xgong)]

Fixed the crash but broke two finger scrolling for me

same here

[Chase Douglas (chasedouglas)]

For those who have seen two finger scrolling and two tap for right click disabled by the latest updates, please see the information in bug 747611.

Thanks