[Lenovo ThinkPad T440s] Mouse lags when using external screen

[Dan Gillmor]

Ubuntu 14.04 on ThinkPad T440s in clamshell mode using external monitor:

The mouse periodically (not always) starts lagging dramatically. It's difficult to position it when this happens, as I'll move the mouse and the pointer will react a later, sometimes a long as a second, and with little precision. Virtually unusable when it gets this way.

I've checked system monitor for runaway processes, and nothing is hogging the CPU.

The mouse is a Microsoft wireless (optical). This also occurred with a Logitech wireless mouse.
---
ApportVersion: 2.14.1-0ubuntu3.5
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: dan 2851 F.... pulseaudio
 /dev/snd/controlC1: dan 2851 F.... pulseaudio
 /dev/snd/controlC0: dan 2851 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=ce662c44-024f-4a63-86e9-7d90e45f6c50
InstallationDate: Installed on 2014-07-08 (91 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: LENOVO 20AQCTO1WW
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-36-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-36.63-generic 3.13.11.6
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-36-generic N/A
 linux-backports-modules-3.13.0-36-generic N/A
 linux-firmware 1.127.7
Tags: trusty
Uname: Linux 3.13.0-36-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 09/03/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: GJET79WW (2.29 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AQCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 PRO
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrGJET79WW(2.29):bd09/03/2014:svnLENOVO:pn20AQCTO1WW:pvrThinkPadT440s:rvnLENOVO:rn20AQCTO1WW:rvrSDK0E50510PRO:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20AQCTO1WW
dmi.product.version: ThinkPad T440s
dmi.sys.vendor: LENOVO

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1378533/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Dan Gillmor (dan-gillmor)]

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[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

Dan Gillmor, thank you for reporting this and helping make Ubuntu better. Could you please test the latest upstream kernel available from the very top line at the top of the page (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER

where VERSION-NUMBER is the version number of the kernel you tested exactly shown as:
kernel-fixed-upstream-3.17

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description.

If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER

Once testing of the upstream kernel is complete, please mark this bug's Status as Confirmed. Please let us know your results. Thank you for your understanding.

[Dan Gillmor (dan-gillmor)]

I'm a bit uncomfortable with the kernel test, as my technical skills are somewhat limited. But I'll give it a try later next week if I can free up some time.

[Landon Noll (ubuntu-bug-mail)]

I am seeing a similar problem as Dan with Ubuntu 14.04 on a Parallels VM under OS X 10.9.5.

[penalvch (penalvch)]

Landon Noll, thank you for your comment. Unfortunately, this bug report is not scoped to you, your hardware, or your problem. So your hardware and problem may be tracked, could you please file a new report with Ubuntu by executing the following in a terminal while booted into the default Ubuntu kernel (not a mainline one) via:
ubuntu-bug linux

For more on this, please read the official Ubuntu documentation:
Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue
Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports
Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette

When opening up the new report, please feel free to subscribe me to it.

As well, please do not announce in this report you created a new bug report.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]