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Message #65004
Re: [Bug 1272624] Re: [Dell Latitude E7440] 14.04 Touchpad causing mouse pointer to spuriously jump around screen
Mark Smith <mrksmith@xxxxxxxxxx> writes:
> I'm on an E7240 running 12.04 LTS (anxiously awaiting my employeer to
> certify 14.04 with all our internal tools and what-not) and I have this
[...]
> - Touch the pad near the middle or bottom. The cursor moves slightly as my finger wiggles around.
> - Without removing the first finger, touch the pad again with a second finger
> above the first finger. The cursor shoots up to a[1]=0 (which is the y
> position).
> - Without removing the first finger, remove the second (top) finger. The cursor
> shoots back down to a[1]=<some large number> Sometimes it takes it all the way
> to the bottom of the screen, sometimes it goes back to where it was, or
> somewhere else. I haven't been able to figure out how it decides what to go back
> to.
I can confirm this behaviour also on Ubuntu 14.04 on the Latitude E7440
(AlpsPS/2 ALPS DualPoint TouchPad). Kernel 3.13.0-29.53 x86-64.
[...]
> Similarly:
>
> - Touch the bad near the top.
> - Without removing the top finger, touch somewhere near the bottom. The cursor doesn't (yet) move.
> - Lift the top finger. The cursor shoots to the bottom.
> - Put down the top finger again, without lifting the bottom. The
> cursor shoots back up again.
This as well.
Øyvind
--
< Øyvind Stegard
< http://stegard.net/
--
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1272624
Title:
[Dell Latitude E7440] 14.04 Touchpad causing mouse pointer to
spuriously jump around screen
Status in “linux” package in Ubuntu:
Triaged
Bug description:
From the live usb the touchpad seems less jerky compared to ubuntu
13.10 but is still not as smooth as Windows 7.
This may be due to how the touchpad is detected as a PS/2 mouse instead of a more appropriate touchpad driver:
https://launchpadlibrarian.net/163664336/BootDmesg.txt
[ 4.088881] mousedev: PS/2 mouse device common for all mice
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-5-generic 3.13.0-5.20
ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
Uname: Linux 3.13.0-5-generic x86_64
ApportVersion: 2.13.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ubuntu 4246 F.... pulseaudio
/dev/snd/controlC1: ubuntu 4246 F.... pulseaudio
CasperVersion: 1.336ubuntu1
CurrentDesktop: Unity
Date: Sat Jan 25 06:50:44 2014
LiveMediaBuild: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140124)
MachineType: Dell Inc. Latitude E7440
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash --
RelatedPackageVersions:
linux-restricted-modules-3.13.0-5-generic N/A
linux-backports-modules-3.13.0-5-generic N/A
linux-firmware 1.122
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/02/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0PPXP5
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd01/02/2014:svnDellInc.:pnLatitudeE7440:pvr01:rvnDellInc.:rn0PPXP5:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E7440
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
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References