Public bug reported: Installing Ubuntu 17.10 on a ThinkPad L570 (L470 should be the same in this regard) leaves the trackpoint as well as the trackpoint buttons in a non-working state. Most probably, it is not correctly detected on startup; dmesg shows
kernel: [ 2.997182 ] input: AlpsPS/2 ALPS GlidePoint as /devices/platform/i8042/serio1/input/input6 As far as I understand it, "GlidePoint" only refers to a touch pad without track point. All events coming from the track point are consequently actively discarded, seen in dmesg as kernel: [ 2279.323441 ] psmouse serio1: alps: Rejected trackstick packet from non DualPoint device Searching for this problem I found this kernel developer discussion which seems related: https://patchwork.kernel.org/patch/9941661/ As suggested by one of the kernel developers there, I added "psmouse.proto=imps" as a kernel boot parameter. The touch pad and track point now show up in the system log as input: PS/2 Generic Mouse as /devices/platform/i8042/serio1/input/input6 And it works well now, just as it should. I also noted that the touch pad became a lot more usable at the same time. Previously (with the default installation) it was lagging and could produce pseudo clicks at random. I am submitting this report here in order to help improve the hardware detection in Ubuntu / linux kernel. Ubuntu version: 17.10 Kernel version: 4.13.0.16.17 Default GNOME desktop, Wayland, etc, just as it comes in the default install ** Affects: ubuntu Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1731163 Title: Trackpoint device not working by default on Thinkpad L570 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1731163/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
