Just tried : neither this issue with Trusty K4.4.0-112 nor K4.15.1 real installs. Only met it with Bionic-dev-Live-K4. I also tried the Live USB with acpi_osi=Linux as seen (but not mandatory) in my usual /etc/default/grub, with no difference : touchpad cursor still laggy, often locks for a while. I noticed that when the touchpad is glued in position on the screen, it is still responsive on right and bottom sides, although the option ~scroll on sides~ is disabled by default in Devices settings. Changing the option as no effect, neither as disabling default enabled 2-Fingers-Scroll. An other strange issue I met with the Live USB : when I reboot from Live, I can't go back in Live with my BIOS F12 Select boot drive: even when I select USB Live, then the usual grub menu is displayed. I have to completely shutdown the laptop so that USB boot selection works, when this is not the case when I reboot from usual installed Trusty. I ran these tests with a new Bionic USB stick created from a Live Bionic session, itself running from the first Bionic key (that was created from an real Xenial install on another machine).
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1746740 Title: XPS13 L322X Bionic (daily dev) touchpad laggy Status in libinput package in Ubuntu: New Status in linux package in Ubuntu: Incomplete Bug description: Also, all function keys work as expected, even F6 (keyboard 3-states backlight), but OSD picture for this last feature randomly auto- triggers. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.13.0-25-generic 4.13.0-25.29 ProcVersionSignature: Ubuntu 4.13.0-25.29-generic 4.13.13 Uname: Linux 4.13.0-25-generic x86_64 ApportVersion: 2.20.8-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: ubuntu 1876 F.... pulseaudio CasperVersion: 1.388 CurrentDesktop: ubuntu:GNOME Date: Thu Feb 1 14:05:22 2018 LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180201) MachineType: Dell Inc. XPS L322X ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: file=/cdrom/preseed/username.seed boot=casper initrd=/casper/initrd.lz quiet splash --- debian-installer/language=fr keyboard-configuration/layoutcode?=fr keyboard-configuration/variantcode?=oss RelatedPackageVersions: linux-restricted-modules-4.13.0-25-generic N/A linux-backports-modules-4.13.0-25-generic N/A linux-firmware 1.170 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/28/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A10 dmi.board.name: 0PJHXN dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA10:bd08/28/2013:svnDellInc.:pnXPSL322X:pvr:rvnDellInc.:rn0PJHXN:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.family: ChiefRiver System dmi.product.name: XPS L322X dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1746740/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
