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.
** Tags added: latest-bios-2.29
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Summary changed:
- Mouse lags when using external screen
+ [Lenovo ThinkPad T440s] Mouse lags when using external screen
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https://bugs.launchpad.net/bugs/1378533
Title:
[Lenovo ThinkPad T440s] Mouse lags when using external screen
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
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
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