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[Dirk Seidel <1437867@xxxxxxxxxxxxxxxxxx>]

The behaviour usually worsens after using the system for a longer time.
As I cannot run on a live system for a longer period, this is hard to
say. I will report after the upgrade to Vivid.

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https://bugs.launchpad.net/bugs/1437867

Title:
  xorg synaptic driver errors

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  My touchpad is behaving strangely (As far as I remember it only appeared after some update in Utopic).
  Using a two or three finger click, it needs several tries till it actually "accepts" the click. Sometimes the mouse pointer jumps to a different location on the screen when clicking with two or the fingers.
  Whenever the touchpad is used, errors get logged in /var/log/Xorg.0.log which seem to be related to the synaptic driver.

  Approximately once every week my X server crashes with a segmentation
  fault.  First the screen turns black and after ~30 seconds the login
  screen appears. In this case the Xorg.0.log ends like this:

   (EE) BUG: triggered 'if (priv->num_active_touches > priv->num_slots)'
  (EE) BUG: ../../src/synaptics.c:2991 in UpdateTouchState()
  (EE) 
  (EE) Backtrace:
  (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x7fbbab374f76]
  (EE) 1: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fbba294a000+0x527e) [0x7fbba294f27e]
  (EE) 2: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fbba294a000+0x75a2) [0x7fbba29515a2]
  (EE) 3: /usr/bin/X (0x7fbbab1be000+0x95968) [0x7fbbab253968]
  (EE) 4: /usr/bin/X (0x7fbbab1be000+0xbfff9) [0x7fbbab27dff9]
  (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (0x7fbba8ef3000+0x36eb0) [0x7fbba8f29eb0]
  (EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (__select+0x33) [0x7fbba8fe4673]
  (EE) 7: /usr/bin/X (WaitForSomething+0x1b4) [0x7fbbab372314]
  (EE) 8: /usr/bin/X (0x7fbbab1be000+0x57311) [0x7fbbab215311]
  (EE) 9: /usr/bin/X (0x7fbbab1be000+0x5b706) [0x7fbbab219706]
  (EE) 10: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7fbba8f14ec5]
  (EE) 11: /usr/bin/X (0x7fbbab1be000+0x45a8e) [0x7fbbab203a8e]
  (EE) 
  (EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
  (EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
  (EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
  (EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
  (EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
  (EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
  (EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
  (EE) [dix] SYN1B7F:01 06CB:2970 UNKNOWN: unable to find touch point 0
  [115313.777] (EE) 
  [115313.777] (EE) Backtrace:
  [115313.778] (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x7fbbab374f76]
  [115313.779] (EE) 1: /usr/bin/X (0x7fbbab1be000+0x1bb179) [0x7fbbab379179]
  [115313.779] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7fbba8ef3000+0x36eb0) [0x7fbba8f29eb0]
  [115313.779] (EE) 3: /usr/bin/X (XIGetDeviceProperty+0x40) [0x7fbbab30d8a0]
  [115313.779] (EE) 4: /usr/bin/X (0x7fbbab1be000+0x14f9f4) [0x7fbbab30d9f4]
  [115313.779] (EE) 5: /usr/bin/X (0x7fbbab1be000+0x14ff7a) [0x7fbbab30df7a]
  [115313.779] (EE) 6: /usr/bin/X (0x7fbbab1be000+0x574f7) [0x7fbbab2154f7]
  [115313.779] (EE) 7: /usr/bin/X (0x7fbbab1be000+0x5b706) [0x7fbbab219706]
  [115313.780] (EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7fbba8f14ec5]
  [115313.780] (EE) 9: /usr/bin/X (0x7fbbab1be000+0x45a8e) [0x7fbbab203a8e]
  [115313.780] (EE) 
  [115313.782] (EE) Segmentation fault at address 0x100000018
  [115313.782] (EE) 
  Fatal server error:
  [115313.782] (EE) Caught signal 11 (Segmentation fault). Server aborting
  [115313.782] (EE) 
  [115313.783] (EE) 
  Please consult the The X.Org Foundation support 
           at http://wiki.x.org
   for help. 
  [115313.783] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
  [115313.783] (EE) 
  [115313.785] (II) AIGLX: Suspending AIGLX clients for VT switch
  [115314.987] (EE) Server terminated with error (1). Closing log file.

  
  I'm not sure if this a different bug or related to synaptic...

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: xorg 1:7.7+7ubuntu2
  ProcVersionSignature: Ubuntu 3.16.0-33.44-generic 3.16.7-ckt7
  Uname: Linux 3.16.0-33-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8.2
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: KDE
  Date: Sun Mar 29 16:04:24 2015
  DistUpgraded: Fresh install
  DistroCodename: utopic
  DistroVariant: kubuntu
  DkmsStatus:
   bbswitch, 0.7, 3.16.0-33-generic, x86_64: installed
   nvidia-304, 304.125, 3.16.0-33-generic, x86_64: installed
   vboxhost, 4.3.20, 3.16.0-33-generic, x86_64: installed
  EcryptfsInUse: Yes
  ExtraDebuggingInterest: Yes
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 0b) (prog-if 00 [VGA controller])
     Subsystem: Acer Incorporated [ALI] Device [1025:091c]
  InstallationDate: Installed on 2015-01-20 (68 days ago)
  InstallationMedia: Kubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  LightdmGreeterLog:
   QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Datei oder Verzeichnis nicht gefunden
   QFileSystemWatcher: failed to add paths: /var/lib/lightdm/.config/ibus/bus
   Bus::open: Can not get ibus-daemon's address. 
   IBusInputContext::createInputContext: no connection to ibus-daemon
  LightdmGreeterLogOld:
   QInotifyFileSystemWatcherEngine::addPaths: inotify_add_watch failed: Datei oder Verzeichnis nicht gefunden
   QFileSystemWatcher: failed to add paths: /var/lib/lightdm/.config/ibus/bus
   Bus::open: Can not get ibus-daemon's address. 
   IBusInputContext::createInputContext: no connection to ibus-daemon
  MachineType: Acer Aspire VN7-571G
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-33-generic root=UUID=5ebd3c26-8bee-44ee-a832-0dbfb0ee72f4 ro quiet splash
  SourcePackage: xorg
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/12/2014
  dmi.bios.vendor: Insyde Corp.
  dmi.bios.version: V1.08
  dmi.board.asset.tag: No Asset Tag
  dmi.board.name: Aspire VN7-571G
  dmi.board.vendor: Acer
  dmi.board.version: V1.08
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: Acer
  dmi.chassis.version: V1.08
  dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.08:bd09/12/2014:svnAcer:pnAspireVN7-571G:pvrV1.08:rvnAcer:rnAspireVN7-571G:rvrV1.08:cvnAcer:ct10:cvrV1.08:
  dmi.product.name: Aspire VN7-571G
  dmi.product.version: V1.08
  dmi.sys.vendor: Acer
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs 20090808ubuntu36
  version.libdrm2: libdrm2 2.4.56-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.2-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.2-0ubuntu0.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.3
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.2
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
  xserver.bootTime: Sat Mar 28 13:16:00 2015
  xserver.configfile: default
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                1091 
   vendor                                     LGD
  xserver.version: 2:1.16.0-1ubuntu1.3

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