Hi, as shown above, I performed the BIOS updated. This indeed gave some improvement, since the middle click now occasionally works. I would guess that with the chance of 1/2-1/8 the click works. In the remaining cases it does not.
I produced the following xev output by clicking 10 times: EnterNotify event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 712557, (82,97), root:(119,198), mode NotifyUngrab, detail NotifyNonlinear, same_screen YES, focus YES, state 16 ButtonPress event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 717995, (82,97), root:(119,198), state 0x10, button 2, same_screen YES ButtonRelease event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 718119, (82,97), root:(119,198), state 0x210, button 2, same_screen YES ButtonPress event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 720032, (82,97), root:(119,198), state 0x10, button 2, same_screen YES ButtonRelease event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 720118, (82,97), root:(119,198), state 0x210, button 2, same_screen YES ButtonPress event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 722695, (82,97), root:(119,198), state 0x10, button 2, same_screen YES ButtonRelease event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 722794, (82,97), root:(119,198), state 0x210, button 2, same_screen YES ButtonPress event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 723863, (82,97), root:(119,198), state 0x10, button 2, same_screen YES ButtonRelease event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 723894, (82,97), root:(119,198), state 0x210, button 2, same_screen YES ButtonPress event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 725879, (82,97), root:(119,198), state 0x10, button 2, same_screen YES ButtonRelease event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 725955, (82,97), root:(119,198), state 0x210, button 2, same_screen YES ButtonPress event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 727717, (82,97), root:(119,198), state 0x10, button 2, same_screen YES ButtonRelease event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 727800, (82,97), root:(119,198), state 0x210, button 2, same_screen YES LeaveNotify event, serial 25, synthetic NO, window 0x3c00001, root 0xd6, subw 0x0, time 731652, (82,97), root:(119,198), mode NotifyGrab, detail NotifyNonlinear, same_screen YES, focus YES, state 24 Please let me know if I can provide additional info. Regards Toby ** 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/1581088 Title: Middle mouse (wheel-click) button stopped working after upgrade to 16.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1581088/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs