ubuntu-x-swat team mailing list archive

[j-b-m <jb@xxxxxxxxxxxx>]

I attached the image to the bug report, since I cannot find a way to
link it correctly

** Attachment added: "Jumping cursor"
   https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/799202/+attachment/2174502/+files/pressure_bug.png

** Description changed:

  Wacom input jumps while drawing with xserver-xorg-core version 2:1.10.1-1ubuntu1.1
  It is working correctly with version 2:1.10.1-1ubuntu1.
  
  This issue is somehow related to issue #762938 (no pressure sensitivity
  with wacom tablet).
  
  A fix for pressure sensitivity was proposed by Chase Douglas in the
  utouch-team/unstable ppa.
  
  Using the official ubuntu Qt version, stylus position works fine, but pressure sensitivity does not work.
  When using Chase Douglas's ppa, pressure works fine, but the cursor position jumps while drawing.
  
  Note that the issue only happens when using the wacom stylus that is
  "pressure sensitive", not when using the wacom mouse that has no
  pressure.
  
  As previously said, the "jumping cursor" issue disappears if I downgrade
  xserver-xorg-core to version 1.10.1-1ubuntu1
  
  The bug can be seen in Krita, when drawing a line, the cursor jumps, a picture showing the problem can be seen here:
- https://launchpadlibrarian.net/73690009/Screenshot-unnamed%20[modified]%20–%20Krita.png
+ https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/799202/+attachment/2174502/+files/pressure_bug.png
  
  I can reproduce the issue on a tablet pc with touch sensitive screen and
  a  desktop pc with usb Wacom tablet.
  
  At least 2 other users are having the same issue, see:
  https://bugs.launchpad.net/ubuntu/+source/pencil/+bug/762938
  
  Using Ubuntu 11.04
  
  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: xserver-xorg-core 2:1.10.1-1ubuntu1.1
  ProcVersionSignature: Ubuntu 2.6.38-10.44-generic-pae 2.6.38.7
  Uname: Linux 2.6.38-10-generic-pae i686
  Architecture: i386
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: kwin
  Date: Sat Jun 18 18:44:38 2011
  DistUpgraded: Fresh install
  DistroCodename: natty
  DistroVariant: kubuntu
  DkmsStatus:
   virtualbox-ose, 4.0.4, 2.6.38-9-generic-pae, i686: installed
   virtualbox-ose, 4.0.4, 2.6.38-10-generic-pae, i686: installed
  GraphicsCard:
   Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 02) (prog-if 00 [VGA controller])
     Subsystem: Lenovo Device [17aa:215a]
  InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Alpha i386 (20110202)
  MachineType: LENOVO 2985FJG
  ProcEnviron:
   LANGUAGE=
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic-pae root=UUID=1524b654-818e-4d16-807f-4e0db5f1b26f ro quiet splash vt.handoff=7
  ProcKernelCmdLine_: BOOT_IMAGE=/boot/vmlinuz-2.6.38-10-generic-pae root=UUID=1524b654-818e-4d16-807f-4e0db5f1b26f ro quiet splash vt.handoff=7
  Renderer: Unknown
  SourcePackage: xorg-server
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 09/15/2010
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6QET53WW (1.23 )
  dmi.board.name: 2985FJG
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvr6QET53WW(1.23):bd09/15/2010:svnLENOVO:pn2985FJG:pvrThinkPadX201Tablet:rvnLENOVO:rn2985FJG:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2985FJG
  dmi.product.version: ThinkPad X201 Tablet
  dmi.sys.vendor: LENOVO
  version.compiz: compiz N/A
  version.libdrm2: libdrm2 2.4.23-1ubuntu6
  version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
  version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
  version.xserver-xorg-video-ati: xserver-xorg-video-ati N/A
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

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https://bugs.launchpad.net/bugs/799202

Title:
  wacom stylus jumps with latest xserver-xorg-core

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