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[Ara Pulido <ara@xxxxxxxxxx>]

Related discussion in #ubuntu-desktop

18:24 < seb128> "we don't map touchscreens to an output, we map it to a portion of the desktop."
18:24 < seb128> " don't know how to fix this other than a database in the style of libwacom"
18:24 < tjaalton> that doesn't sound too promising..
18:24 < mlankhorst> probably needs to happen :/
18:26 < bregma> big problem with a generalized solution to that touchscreen problem is that there is no association between the touch device and the display
18:26 < mlankhorst> yeah..
18:27 < bregma> not even at the kernel level
18:28 < mlankhorst> but for now assuming touchscreen maps to the eDP or integrated screen would be best bet :/
18:29 < bregma> it would makea reasonable starting default but isn't anything like a good solution since there are lots of external touchscreens out there
18:30 < seb128> yeah
18:31 < mlankhorst> how are they handled on other platforms?
18:31 < seb128> it would also mean that if I dock my 3 years non-touch laptop on an external touch monitor things would be the wrong way around
18:31 < tjaalton> but confirmed..
18:31 < tjaalton> *bug
18:31 < mlankhorst> tjaalton: which?
18:31 < tjaalton> the touch one
18:32 < mlankhorst> ah
18:32 < tjaalton> i've got this lovely harris beach sdp..
18:32 < bregma> mlankhorst, how are they handled on other platforms? poorly, just like high-DPI
18:32 < tjaalton> now excuse me while it dist-upgrades trusty->trusty for the next two hours..
18:33 < tjaalton> hmm I have win8 on this too
18:35 < mlankhorst> could we make it a ui thing perhaps?
18:36 < mlankhorst> let the user suffer for next few years until things standardize :/

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which is subscribed to the bug report.
https://bugs.launchpad.net/bugs/1287341

Title:
  Touchscreen controls both screens in dual-monitor setup

Status in Gnome Settings Daemon:
  New
Status in OEM Priority Project:
  New
Status in OEM Priority Project trusty series:
  New
Status in “gnome-settings-daemon” package in Ubuntu:
  Triaged
Status in “unity-settings-daemon” package in Ubuntu:
  Triaged

Bug description:
  My laptop has a touchscreen. It works fine in 14.04 until I plug in an
  external monitor. When using an external monitor, input from the
  touchscreen is remapped so that the touchscreen provides input to both
  monitors. The result is that there is no longer a 1:1 correspondence
  between moving your finger and the cursor. This is confusing and
  difficult to use.

  A touchscreen is a direct input device (vs an indirect one like a
  mouse/touchpad); input from the touchscreen should be bound to the
  physical display that it's attached to.

  
  To reproduce:
  1) On a computer with a touchscreen, use the touchscreen to move a window around, including to the edges of the screen. Note that the window moves exactly with your finger.
  2) Plug in an external monitor
  3) Try the same actions as in step 1

  Expected results:
  The touchscreen continues to operate as in step 1, allowing you to manipulate items on the display that contains the touchscreen. The touchscreen does not interact with windows, etc on the external monitor

  Actual results:
  The touchscreen is remapped across both displays. The result is that touch events no longer happen 'under the finger'. Assuming the two displays are the same size and resolution, moving your finger 1cm will cause the window or other objects to move 2cm onscreen. It becomes impossible to use the touchscreen to interact with widgets (menus, buttons, etc).

  
  This is described in couple places:
  http://askubuntu.com/questions/51445/how-do-i-calibrate-a-touchscreen-on-a-dual-monitor-system
  http://askubuntu.com/questions/71768/touchscreen-and-additional-external-monitor

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xinput 1.6.1-1
  ProcVersionSignature: Ubuntu 3.13.0-14.34-generic 3.13.5
  Uname: Linux 3.13.0-14-generic x86_64
  .tmp.unity.support.test.0:
   
  ApportVersion: 2.13.2-0ubuntu5
  Architecture: amd64
  CompizPlugins: [core,commands,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
  CompositorRunning: compiz
  CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
  CompositorUnredirectFSW: true
  CurrentDesktop: Unity
  Date: Mon Mar  3 14:41:14 2014
  DistUpgraded: 2014-02-12 13:40:42,704 DEBUG enabling apt cron job
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-precise-amd64-20130203-1
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   oem-audio-hda-daily-lts-quantal, 0.201308192259~precise1, 3.5.0-45-generic, x86_64: installed
   virtualbox, 4.3.6, 3.13.0-12-generic, x86_64: installed
   virtualbox, 4.3.6, 3.13.0-14-generic, x86_64: installed
   virtualbox, 4.3.6, 3.13.0-8-generic, x86_64: installed
  EcryptfsInUse: Yes
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Dell Device [1028:060a]
  InstallationDate: Installed on 2013-12-02 (90 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
  MachineType: Dell Inc. XPS13 9333
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-14-generic root=UUID=0b9db31c-747b-40ad-bbbd-13a9a29caece ro quiet splash vt.handoff=7
  SourcePackage: xinput
  UpgradeStatus: Upgraded to trusty on 2014-02-12 (19 days ago)
  dmi.bios.date: 11/11/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A01
  dmi.board.name: 0GFTRT
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA01:bd11/11/2013:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0GFTRT:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: XPS13 9333
  dmi.sys.vendor: Dell Inc.
  version.compiz: compiz 1:0.9.11+14.04.20140218-0ubuntu1
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.0~rc1-1ubuntu4
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.0~rc1-1ubuntu4
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu6
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3
  version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
  version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
  xserver.bootTime: Mon Mar  3 11:02:50 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                                4933 
   vendor                                     CMN
  xserver.version: 2:1.15.0-1ubuntu6

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