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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1746740 Title: XPS13 L322X Bionic (daily dev) touchpad laggy To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1746740/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
