I could reproduce the bug with v4.7-rc7
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/1600371
Title:
Gnome freezes for some seconds on simultaneous touch and stylus input
(palm rejection fails)
Status in linux package in Ubuntu:
Confirmed
Bug description:
My notebook (Lenovo Yoga S1) has a capacitive touch screen as well as
an inductive screen for styluses. When I rest my palm on the screen
and then hover my stylus above the screen so that the stylus is
recognized and the mouse pointer follows it, and then move the stylus
around Gnome seems to freeze for some seconds. The duration of the
freeze is proportional to the time the notebook received simultaneous
input from the two methods.
"Freeze" means that the screen is not updated. Keyboard inputs that I
make during the freeze would be executed after the freezing stops.
I do not need to touch the screen with the stylus for the bug to
occur. The bug occurs also when I actually touch the screen with the
stylus.
What I expect to happen (and what actually happens in all stylus-
supporting tablets, running with Android or Windows) is that the input
from the touch screen is rejected as long as the stylus is hovering
above the screen.
I'm running Ubuntu Gnome 16.04 (non-LTS) with the latest packages. The
problem was present in 15.10 as well.
I attach a script as a workaround solution.
---
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: timeshifter 1787 F.... pulseaudio
/dev/snd/controlC0: timeshifter 1787 F.... pulseaudio
CurrentDesktop: GNOME
DistroRelease: Ubuntu 16.04
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=87cca434-274f-4464-9598-97fd7a1338fe
InstallationDate: Installed on 2016-03-19 (111 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64
(20151021)
MachineType: LENOVO 20C0003SFR
Package: linux (not installed)
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=de_DE.UTF-8
SHELL=/usr/bin/zsh
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-28-generic
root=UUID=e52c99ea-9646-4e8a-b8ad-c47b175ac5a3 ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.4.0-28.47-generic 4.4.13
RelatedPackageVersions:
linux-restricted-modules-4.4.0-28-generic N/A
linux-backports-modules-4.4.0-28-generic N/A
linux-firmware 1.157.1
Tags: xenial
Uname: Linux 4.4.0-28-generic x86_64
UpgradeStatus: Upgraded to xenial on 2016-07-02 (6 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare scanner sudo vboxusers
wireshark
_MarkForUpload: True
dmi.bios.date: 04/29/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: B0ET33WW (1.20 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20C0003SFR
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrB0ET33WW(1.20):bd04/29/2016:svnLENOVO:pn20C0003SFR:pvrThinkPadS1Yoga:rvnLENOVO:rn20C0003SFR:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 20C0003SFR
dmi.product.version: ThinkPad S1 Yoga
dmi.sys.vendor: LENOVO
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