With kernel 4.8.11-300.fc25.x86_64 everything works fine, but if I install and boot into 4.8.13-300.fc25.x86_64, the BYD touchpad I have will behave erratically: when reaching the GDM login screen, after a second or two the mouse cursor will jump to the top-right corner of the screen and "wiggle" while staying stuck there, no matter what I do with it (and turning off+on the touchpad using the keyboard doesn't change anything). $ xinput list ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ BYDPS/2 BYD TouchPad id=12 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Power Button id=8 [slave keyboard (3)] ↳ Sleep Button id=9 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=11 [slave keyboard (3)]
Created attachment 1233177 [details] journalctl output This also happens with 4.8.14-300.fc25.x86_64. Didn't see anything unusual in the journalctl output. The driver's source seems to be: https://github.com/torvalds/linux/blob/master/drivers/input/mouse/byd.c Booting into 4.8.11 still works so as a user all I can do is version lock it... but this probably bite anyone with a Librem laptop, or many of the Dell laptops out there as seen in https://bugs.freedesktop.org/show_bug.cgi?id=96756's description. Possibly related upstream bugs: https://bugzilla.kernel.org/show_bug.cgi?id=121281 https://bugzilla.kernel.org/show_bug.cgi?id=120781
Oh, need to correct something in the description above: this does not happen if you leave the touchpad untouched, it happens as soon as you touch the touchpad to move the mouse.
*********** MASS BUG UPDATE ************** We apologize for the inconvenience. There is a large number of bugs to go through and several of them have gone stale. Due to this, we are doing a mass bug update across all of the Fedora 25 kernel bugs. Fedora 25 has now been rebased to 4.9.3-200.fc25. Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel. If you have moved on to Fedora 26, and are still experiencing this issue, please change the version to Fedora 26. If you experience different issues, please open a new bug report for those.
*********** MASS BUG UPDATE ************** This bug is being closed with INSUFFICIENT_DATA as there has not been a response in 4 weeks. If you are still experiencing this issue, please reopen and attach the relevant data from the latest kernel you are running and any data that might have been requested previously.