Found the culprit: it's the Intel GPU. If I use Intel IGP, the situation is as I described. If I use the nvidia graphics card, everything works fine with gnome+org, acpi=on.
I've read that support on the IGP for i7-7700HQ on linux is still ongoing work, so I guess I'll have to wait before I can use it, or do without touchpad, suspend, etc. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1738560 Title: touch pad stopped working after upgrade to artful 17.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1738560/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs