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[David Baumann <davidbaumann@xxxxxx>]

The same here for me.
I am running it on my HiDPI mobile workstation. The internal screen is set to x1.25; my external screen is set to x1.0.

When I switch the screen, the cursor is off. Did not try to resize yet,
but will try to find a way to test this bug for non-HiDPI users.

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https://bugs.launchpad.net/bugs/1467608

Title:
  cursor position sometimes off with HiDPI screen

Status in chromium-browser package in Ubuntu:
  Confirmed

Bug description:
  Sometimes the cursor tracking is wrong when using chromium-browser as
  in the pointer on the screen is pointing to one place but chromium
  sees it in another. If I move the cursor outside of chromium, other
  applications track it fine. Most of the time things are ok with
  chromium, but when this happens the text in the web page also goes
  slightly fuzzy. Thankfully, a workaround is simply to resize the
  window (it doesn't seem to matter how much). After which, the text is
  no longer fuzzy and the mouse is tracked correctly.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: chromium-browser 43.0.2357.81-0ubuntu0.15.04.1.1170
  ProcVersionSignature: Ubuntu 3.19.0-21.21-generic 3.19.8
  Uname: Linux 3.19.0-21-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  CurrentDesktop: Unity
  DRM.card0.DP.1:
   edid-base64: AP///////wAQrL1ATFY4QQ4ZAQSlPCJ4OiiVp1VOoyYPUFSlSwDRANHAswCpQIGAgQBxTwEBTdAAoPBwPoAwIDUAVVAhAAAaAAAA/wAzMlIxRjU0MUE4VkwKAAAA/ABERUxMIFAyNzE1UQogAAAA/QAdSx+MNgEKICAgICAgAYcCAx3xUBAfIAUUBBMSEQMCFhUHBgEjCR8HgwEAAFZeAKCgoClQMCA1AFVQIQAAGgI6gBhxOC1AWCwlAFVQIQAAHgEdAHJR0B4gbihVAFVQIQAAHgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQA==
   dpms: On
   modes: 3840x2160 2560x1440 1920x1200 1920x1080 1920x1080 1920x1080 1920x1080i 1920x1080i 1920x1080 1920x1080i 1920x1080 1920x1080 1600x1200 1680x1050 1280x1024 1280x1024 1280x800 1152x864 1280x720 1280x720 1280x720 1024x768 1024x768 800x600 800x600 720x576 720x480 720x480 640x480 640x480 640x480 720x400
   enabled: enabled
   status: connected
  DRM.card0.HDMI.A.1:
   edid-base64: 
   dpms: On
   modes: 
   enabled: disabled
   status: disconnected
  DRM.card0.eDP.1:
   edid-base64: AP///////wBNECEUAAAAADIYAQSlHRF4Dt5Qo1RMmSYPUFQAAAABAQEBAQEBAQEBAQEBAQEBzZGAoMAINHAwIDUAJqUQAAAYAAAAEAAAAAAAAAAAAAAAAAAAAAAA/gAwNVA3SIVMUTEzM1oxAAAAAAACQQMoABIAAAsBCiAgABs=
   dpms: On
   modes: 3200x1800
   enabled: enabled
   status: connected
  Date: Mon Jun 22 11:48:38 2015
  Desktop-Session:
   'ubuntu'
   '/etc/xdg/xdg-ubuntu:/usr/share/upstart/xdg:/etc/xdg'
   '/usr/share/ubuntu:/usr/share/gnome:/usr/local/share/:/usr/share/'
  Env:
   'None'
   'None'
  InstallationDate: Installed on 2015-06-13 (8 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  Load-Avg-1min: 0.41
  Load-Processes-Running-Percent:   0.1%
  MachineType: Dell Inc. XPS 13 9343
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-21-generic root=UUID=7bc4dcd2-0bd8-4e42-b8b7-9f1ed6b8a3e9 ro libata.force=noncq quiet splash vt.handoff=7
  SourcePackage: chromium-browser
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/25/2015
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.name: 0310JH
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd03/25/2015:svnDellInc.:pnXPS139343:pvr01:rvnDellInc.:rn0310JH:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: XPS 13 9343
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.
  gconf-keys: /desktop/gnome/applications/browser/exec = b'firefox\n'/desktop/gnome/url-handlers/https/command = b'firefox %u\n'/desktop/gnome/url-handlers/https/enabled = b'true\n'/desktop/gnome/url-handlers/http/command = b'firefox %u\n'/desktop/gnome/url-handlers/http/enabled = b'true\n'/desktop/gnome/session/required_components/windowmanager = b'compiz\n'/apps/metacity/general/compositing_manager = b''/desktop/gnome/interface/icon_theme = b'ubuntu-mono-dark\n'/desktop/gnome/interface/gtk_theme = b'Ambiance\n'
  modified.conffile..etc.default.chromium.browser: [deleted]

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