apport information ** Tags added: apport-collected xenial
** Description changed: 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 ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1600371/+attachment/4697687/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1600371 Title: Gnome freezes for some seconds on simultaneous touch and stylus input (palm rejection fails) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1600371/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
