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[Launchpad Bug Tracker <1454473@xxxxxxxxxxxxxxxxxx>]

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Version: Ubuntu 3.19.0-16.16-generic 3.19.3

(This is mostly a copy paste from here:
http://askubuntu.com/questions/617117/in-ubuntu-15-04-simply-moving-the-
mouse-via-touchpad-scrolls-the-window)

When I first boot everything works fine. But then something happens (not
sure what triggers it) and many programs start scrolling just by moving
the mouse over the window. So far I see this happens in Nautilus,
Document Reader, Archive Manager, Ubuntu Software Center, Meld, and
System Monitor (what do they all have in common, GTK?). It does NOT
happen in web browsers, thunderbird, programs using Mono, Java, etc, for
some reason.

To be more specific of the issue: if the mouse starting position is over
a document in Document Reader, for example, and then I move the mouse
via touchpad, it'll scroll the document like an anchor, where the
position of the mouse over the document doesn't change (yet it scrolls).
I have already tried disabling "two finger scroll", "disable while
typing", and the "tap to click" options, but they made no difference
(after the glitchiness starts).

The other odd case is that in Nautilus, if the mouse starting position
is over a file or directory, it sometimes selects it instead of
scrolling. Single-clicking a directory will open the directory (so the
initial touch acts like a clicks, and letting go acts as the second
click).

The only thing I can do to temporarily fix the problem is restart the
computer. There are no issues when using a mouse.

Update 2015/05/03: I see how to reproduce it now. It appears to be a
glitchy two-finger scroll issue. If you scroll any window with two
fingers a lot, eventually it'll start causing this problem. Try various
actions with two fingers, like "clicking" with two fingers, or scrolling
in various directions quickly, etc, and it will start happening. It's
interesting that it only happens in certain programs and not in others,
which makes me wonder whether it is really a trackpad issue or some
framework's issue. I can confirm that this is happening on the 15.04
Live CD, so this happens out of the box.

The only work-around for this issue is to disable two-finger scroll (if
it's already glitchy you'll need to restart). Not sure if it matters,
but I'm using the Dell XPS 13 2015 9343.

Update 2015/05/05: Apparently this bug can still happen even with two-
finger scroll off, though it's more rare. Again, only certain programs
have the issue, so it's hard to tell if it's a touchpad issue or
something else.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-16-generic 3.19.0-16.16
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  ephi       1857 F.... pulseaudio
 /dev/snd/controlC0:  ephi       1857 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue May 12 22:06:46 2015
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=270ecec3-b78c-4f85-a337-acd54f5e0b0e
InstallationDate: Installed on 2015-05-01 (12 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
Lsusb:
 Bus 001 Device 004: ID 0bda:5682 Realtek Semiconductor Corp.
 Bus 001 Device 003: ID 0a5c:216f Broadcom Corp.
 Bus 001 Device 010: ID 1d57:ac01 Xenta Wireless Receiver (Keyboard and Mouse)
 Bus 001 Device 002: ID 8087:8001 Intel Corp.
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. XPS 13 9343
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-16-generic.efi.signed root=UUID=2bf488f3-23aa-4837-8f4d-861be61c94bc ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.19.0-16-generic N/A
 linux-backports-modules-3.19.0-16-generic  N/A
 linux-firmware                             1.143
SourcePackage: linux
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: 0TM99H
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.:rn0TM99H:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: XPS 13 9343
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: Confirmed


** Tags: amd64 apport-bug mouse touchpad vivid
-- 
In Ubuntu 15.04, simply moving the mouse via touchpad scrolls the window
https://bugs.launchpad.net/bugs/1454473
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