Okay, a little embarassing, but I went back to my original kernel (3.16.0-25) and I realized I could not reproduce the touchpad problems I had had before. Admittedly double-tap is a little bit finicky and I probably assumed it was broken but I think the actual problem is just that the allowed delay between clicks is really short (is there a way to increase that?). It is just as short in later kernels too, however.
Basically this means nothing has changed aside from my testing methodology for touchpads. Human error on my part, mea culpa. Since there is no change in features between kernels, the commit bisect would seem to be unnecessary now. Clickpad hardware buttons are still malfunctioning, though. ** 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/1398533 Title: [HP Stream Notebook - 11-d010nr] clickpad malfunctions after performing a click in Lubuntu 14.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1398533/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs