two cursors instead of one

Bug #1388887 reported by Christopher Barrington-Leigh on 2014-11-03
This bug affects 3 people
Affects Status Importance Assigned to Milestone
xorg (Ubuntu)

Bug Description

Since upgrading from 14.04 to 14.10, I sometimes (not sure what triggers or fixes it) have a double cursor. It persists across applications and the desktop. When I do a screen capture, the cursor is not visible.

There is one cursor in the right place, and then below and to the right of it is another cursor, pointing at a different angle, that follows it around everywhere.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: xorg 1:7.7+7ubuntu2
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64

ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Mon Nov 3 10:44:58 2014
DistUpgraded: 2014-10-31 16:06:04,383 DEBUG enabling apt cron job
DistroCodename: utopic
DistroVariant: ubuntu
 virtualbox, 4.3.18, 3.13.0-39-generic, x86_64: installed
 virtualbox, 4.3.18, 3.16.0-24-generic, x86_64: installed

EcryptfsInUse: Yes
ExtraDebuggingInterest: Yes, if not too technical
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:2203]
InstallationDate: Installed on 2014-08-21 (74 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: LENOVO 34372VU
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-24-generic root=UUID=5bbcb663-813b-4d47-b431-9d7f27eb691d ro quiet splash vt.handoff=7
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to utopic on 2014-10-31 (2 days ago) 05/28/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GCET99WW (2.59 )
dmi.board.asset.tag: Not Available 34372VU
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGCET99WW(2.59):bd05/28/2014:svnLENOVO:pn34372VU:pvrThinkPadX230Tablet:rvnLENOVO:rn34372VU:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: 34372VU
dmi.product.version: ThinkPad X230 Tablet
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.0-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.0-0ubuntu3
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Fri Oct 31 16:14:19 2014
xserver.configfile: default
xserver.logfile: /var/log/Xorg.0.log
 product id 728
 vendor LGD
xserver.version: 2:1.16.0-1ubuntu1

This is happening a lot of the time. Since screen captures don't capture it, I took a photo. This is what my cursor looks like!

Timo Aaltonen (tjaalton) wrote :
Changed in xorg (Ubuntu):
status: New → Incomplete

I do use external screen rotation when I'm docked.
I hadn't noticed a simple association, but that might be at least one trigger for the problem.

Also, trying these steps from the other bug:

xrandr --output LVDS1 --rotate left

# do something, click a few buttons...

xrandr --output LVDS1 --rotate normal

did cause a double cursor for me just now.

So this is likely it. Does that mean we can easily get a fix in 14.10?

This bug definitely occurs when I have not just rotated or un-rotated a screen. That is, the cursor can be fine, and then it suddenly changes to two cursors when some new window pops up or something (not sure what).

However, I am using an external monitor which is rotated, at the time.

Let me reiterate, since this has just been marked as a duplicate: I experience this when the screen has NOT just been rotated or un-rotated.
(However, I've not looked at the patch to understand whether it will cover broader circumstances.)

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