Public bug reported: Installed ubuntu 16.04 a while ago and touchpad was working. It does work as well on LiveCDs. After upgrading kernel and some system packages (i've even removed xorg-input-synaptics), touchpad does not even show in `xinput list`. USB mouse works though.
I've skimmed dozens of pages in askubuntu and stackexchange to no avail: https://unix.stackexchange.com/questions/28736/what-does-the-i8042-nomux-1-kernel-option-do-during-booting-of-ubuntu https://askubuntu.com/questions/763584/elantech-touchpad-not-working-on-ubuntu-16-04-and-arch-linux https://ubuntuforums.org/showthread.php?t=2323564 https://ubuntuforums.org/showthread.php?t=2352021 Most of these revolved around tampering with the `GRUB_CMDLINE_LINUX_DEFAULT=` argument in `/etc/default/grub` and removing `xserver-xorg-input-synaptics` package along with confs. --- ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: t 2063 F.... pulseaudio /dev/snd/pcmC0D0p: t 2063 F...m pulseaudio /dev/snd/controlC0: t 2063 F.... pulseaudio CurrentDesktop: GNOME DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=e86768f6-cc8c-4bdc-91fb-a25e5184ee57 InstallationDate: Installed on 2017-08-27 (182 days ago) InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801) MachineType: CyberpowerPC Tracer II NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia Package: linux (not installed) ProcFB: 0 EFI VGA 1 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-36-generic.efi.signed root=UUID=6814f425-7e3f-4911-8fa7-e4637ae009c4 ro atkbd.reset=1 i8042.nomux=1 i8042.reset=1 i8042.nopnp=1 i8042.dumbkbd=1 i8042.kbdreset=1 quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13 RelatedPackageVersions: linux-restricted-modules-4.13.0-36-generic N/A linux-backports-modules-4.13.0-36-generic N/A linux-firmware 1.157.16 Tags: xenial Uname: Linux 4.13.0-36-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 02/23/2017 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: N.1.03 dmi.board.asset.tag: Standard dmi.board.name: Tracer II dmi.board.vendor: CyberpowerPC dmi.board.version: Standard dmi.chassis.asset.tag: Standard dmi.chassis.type: 9 dmi.chassis.vendor: Standard dmi.chassis.version: Standard dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN.1.03:bd02/23/2017:svnCyberpowerPC:pnTracerII:pvrStandard:rvnCyberpowerPC:rnTracerII:rvrStandard:cvnStandard:ct9:cvrStandard: dmi.product.family: KBL dmi.product.name: Tracer II dmi.product.version: Standard dmi.sys.vendor: CyberpowerPC ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: apport-collected xenial ** Attachment added: "devices" https://bugs.launchpad.net/bugs/1751676/+attachment/5063087/+files/devices -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1751676 Title: Synaptics' touchpad not detected in 'CyberpowerPC Tracer II' laptop after kernel, system and multiple packages upgrade (for instance: CUDA, libinput, etc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1751676/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
