Comment 51 for bug 799202

Tested /usr/lib/qt4/examples/widgets/tablet/tablet, works ok with both
pressure and tilt.

2011/9/20 Jussi Pakkanen <email address hidden>

> Animtim, could you try the qt4 tablet test application mentioned above?
> Does it behave properly with both pressure and tilt based line width?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/799202
>
> Title:
> wacom stylus jumps with latest xserver-xorg-core
>
> Status in “xorg-server” package in Ubuntu:
> In Progress
>
> Bug description:
> 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://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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