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[Bug 1338243] Re: spurious zooming when scrolling with touchpad

 

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

** Changed in: xorg (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1338243

Title:
  spurious zooming when scrolling with touchpad

Status in xorg package in Ubuntu:
  Confirmed

Bug description:
  How to reproduce the bug

  * open a long PDF in evince, or a long webpage in Firefox (this page should do)
  * sroll with touchpad (two-fingers on my system)
  * when you take of your fingers from the touchpad, the document keeps on scrolling, slowing down (like inertia)
  * before it has completely stopped, press CTRL (pretend you want to do CTRL+F, for example)
  * the document zooms (in or out, depending on the direction of the scroll and your configuation)

  I think I understand what happens here: in order to provide the
  "inertia" in the scrolling, the touch pas emits "scroll" events even
  after I stoped moving my finders, and as soon as I press CTRL, *those*
  events are interpreted as zoom events. But this is very annoying. I
  would expect that those "extra" events inherit modifiers from the
  "original" events, no matter what happens on the keyboard.

  Also, it happened to me quite a lot recently (14.04 upgrade?), so I
  suspect this might be due to a recent change.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: xorg 1:7.7+1ubuntu8
  ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
  Uname: Linux 3.13.0-30-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
  CompositorRunning: None
  CurrentDesktop: GNOME
  Date: Sun Jul  6 16:09:19 2014
  DistUpgraded: 2014-05-16 20:26:38,732 DEBUG enabling apt cron job
  DistroCodename: trusty
  DistroVariant: ubuntu
  DkmsStatus:
   virtualbox, 4.3.10, 3.11.0-20-generic, x86_64: installed
   virtualbox, 4.3.10, 3.13.0-24-generic, x86_64: installed
   virtualbox, 4.3.10, 3.13.0-27-generic, x86_64: installed
   virtualbox, 4.3.10, 3.13.0-29-generic, x86_64: installed
   virtualbox, 4.3.10, 3.13.0-30-generic, x86_64: installed
  ExtraDebuggingInterest: Yes, if not too technical
  GraphicsCard:
   Intel Corporation Haswell-ULT Integrated Graphics Controller [8086:0a16] (rev 09) (prog-if 00 [VGA controller])
     Subsystem: Sony Corporation Device [104d:90b6]
  InstallationDate: Installed on 2013-11-20 (227 days ago)
  InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Release amd64 (20131017)
  Lsusb:
   Bus 001 Device 002: ID 8087:8000 Intel Corp. 
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
   Bus 003 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 002 Device 002: ID 0bda:5727 Realtek Semiconductor Corp. 
   Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: Sony Corporation SVP1321R4E
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=a655c41f-a13c-45f0-9863-9e9d6209d9e4 ro quiet splash vt.handoff=7
  SourcePackage: xorg
  UpgradeStatus: Upgraded to trusty on 2014-05-16 (50 days ago)
  dmi.bios.date: 09/09/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: R1040V7
  dmi.board.asset.tag: N/A
  dmi.board.name: VAIO
  dmi.board.vendor: Sony Corporation
  dmi.board.version: N/A
  dmi.chassis.asset.tag: N/A
  dmi.chassis.type: 10
  dmi.chassis.vendor: Sony Corporation
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR1040V7:bd09/09/2013:svnSonyCorporation:pnSVP1321R4E:pvrC60C6N5S:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
  dmi.product.name: SVP1321R4E
  dmi.product.version: C60C6N5S
  dmi.sys.vendor: Sony Corporation
  version.compiz: compiz N/A
  version.ia32-libs: ia32-libs N/A
  version.libdrm2: libdrm2 2.4.52-1
  version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
  version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
  version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
  version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
  version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
  version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
  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: Sun Jul  6 09:54:40 2014
  xserver.configfile: default
  xserver.errors:
   
  xserver.logfile: /var/log/Xorg.0.log
  xserver.outputs:
   product id                               38562 
   vendor                                     MEI
  xserver.version: 2:1.15.1-0ubuntu2

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