cursor position sometimes off with HiDPI screen

Bug #1467608 reported by Jamie Strandboge on 2015-06-22
12
This bug affects 2 people
Affects Status Importance Assigned to Milestone
chromium-browser (Ubuntu)
Undecided
Unassigned

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]

Jamie Strandboge (jdstrand) wrote :
Launchpad Janitor (janitor) wrote :

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

Changed in chromium-browser (Ubuntu):
status: New → Confirmed
David Baumann (davidbaumann) wrote :

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.

David Baumann (davidbaumann) wrote :

So I can reproduce:

Start on external screen, factor 1.00
Lock the screen
Remove from dock
Open Lid

-> Now cursor is off

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