Multitouch events cause Xorg freeze

[Henri Sundelin]

Any kind of multitouch event causes immediate X freeze every time. Workaround is to disable multitouch from input-evdev, after that everything works normally.

Hardware is Samsung Series 7 Slate, w/ Sandy Bridge & Atmel maXTouch multitouch screen.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xorg 1:7.6+10ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-19.30-generic 3.2.11
Uname: Linux 3.2.0-19-generic x86_64
ApportVersion: 1.94.1-0ubuntu2
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
Date: Wed Mar 21 17:24:50 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, whatever it takes to get this fixed in Ubuntu
GpuHangFrequency: Continuously
GpuHangReproducibility: Yes, I can easily reproduce it
GpuHangStarted: Immediately after installing this version of Ubuntu
GraphicsCard:
 Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Samsung Electronics Co Ltd Device [144d:c0be]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 700T
ProcEnviron:
 TERM=xterm-color
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.2.0-19-generic root=UUID=8a0dceb5-cd80-4d96-aaf4-e5b4362b0867 ro rootflags=subvol=@ pcie_aspm=force i915.i915_enable_rc6=1 acpi_backlight=vendor
SourcePackage: xorg
Symptom: display
Title: Xorg freeze
UpgradeStatus: Upgraded to precise on 2012-03-11 (10 days ago)
dmi.bios.date: 02/02/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 08FW.M084.20120202.SSH
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: 700T
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: 08FW
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 8
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr08FW.M084.20120202.SSH:bd02/02/2012:svnSAMSUNGELECTRONICSCO.,LTD.:pn700T:pvr08FW:rvnSAMSUNGELECTRONICSCO.,LTD.:rn700T:rvr08FW:cvnSAMSUNGELECTRONICSCO.,LTD.:ct8:cvrN/A:
dmi.product.name: 700T
dmi.product.version: 08FW
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
version.compiz: compiz 1:0.9.7.0+bzr3035-0ubuntu1
version.ia32-libs: ia32-libs 20090808ubuntu35
version.libdrm2: libdrm2 2.4.30-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.1-0ubuntu5
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.1-0ubuntu5
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20111201+b5534a1-1build2

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.