whoops, I meant the linked kernel.org thread. :)
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https://bugs.launchpad.net/bugs/1651635
Title:
XPS 13 9360 trackpad locks into scroll mode
Status in Dell Sputnik:
Confirmed
Status in Linux:
Unknown
Status in linux package in Ubuntu:
New
Bug description:
Hello,
I'm running Linux on a Dell XPS 13 (9360) laptop.
I find that upwards of 10 times per day, my trackpad gets stuck in
"scrolling" mode. Moving the trackpad won't move the X windows
pointer, but will send scrolling events to the foreground window.
When the trackpad is locked in this mode, the touchscreen will still
let me move the mouse cursor, as will an external mouse.
On Ubuntu 16.04 freshly restored from the Dell recovery image, I find
that it's often difficult to get the trackpad to recover.
I do find that the issue happens less frequently on Dell's build of
Ubuntu 16.04 than on other linux distributions and versions, but it
still happens enough to significantly impact my ability to do
productive work.
The issue does not occur when running Windows 10 on the same device.
I suspect that the issue may be related to palm detection or
misdetecting the user's palm as a gesture to enable scrolling mode,
but have no proof for this.
It seems that I'm often able to reproduce the issue by brushing the
trackpad with my right palm.
On Ubuntu 16.10, with the latest shipped 4.8 kernel (Linux szx
4.8.0-30-generic #32-Ubuntu SMP Fri Dec 2 03:43:27 UTC 2016 x86_64
x86_64 x86_64 GNU/Linux), with the extra xinput configuration below, I
am able to get the trackpad to recover, simply by clicking the
trackpad:
/usr/share/X11/xorg.conf.d/99-libinput.conf:
Section "InputClass"
Identifier "libinput touchpad catchall"
Driver "libinput"
MatchIsTouchpad "on"
MatchDevicePath "/dev/input/event*"
Option "Tapping" "True"
Option "DisableWhileTyping" "True"
Option "NaturalScrolling" "False"
Option "AccelProfile" "adaptive"
Option "AccelSpeed" "0.05"
Option "MiddleEmulation" "True"
Option "ScrollMethod" "twofinger"
# Option "ClickMethod" "clickfinger"
Option "ClickMethod" "buttonareas"
EndSection
In my experience, the problem manifests using both the Xorg synaptics driver
and the Xorg libinput driver.
root@szx:/etc/modprobe.d# xinput list
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer
(2)]
⎜ ↳ Logitech M570 id=10 [slave pointer
(2)]
⎜ ↳ DLL075B:01 06CB:76AF Touchpad id=13 [slave pointer
(2)]
⎜ ↳ ELAN Touchscreen id=11 [slave pointer
(2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave
keyboard (3)]
↳ Power Button id=6 [slave
keyboard (3)]
↳ Video Bus id=7 [slave
keyboard (3)]
↳ Power Button id=8 [slave
keyboard (3)]
↳ Sleep Button id=9 [slave
keyboard (3)]
↳ Integrated_Webcam_HD id=12 [slave
keyboard (3)]
↳ Intel Virtual Button driver id=14 [slave
keyboard (3)]
↳ Intel HID events id=15 [slave
keyboard (3)]
↳ AT Translated Set 2 keyboard id=16 [slave
keyboard (3)]
↳ Dell WMI hotkeys id=17 [slave
keyboard (3)]
root@szx:/etc/modprobe.d#
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