Here are some steps to easily reproduce the issue: 1. Start typing text in a program like firefox. 2. Try to use your touchpad immediatly after typing.
It occurs often that the touchpad is not usable in step 2 because it lost sync. Heres my dmesg log. [ 27.145500] psmouse serio4: synaptics: Touchpad model: 1, fw: 7.2, id: 0x1c0b1, caps: 0xd047b3/0xb40000/0xa0000 [ 27.145517] psmouse serio4: synaptics: serio: Synaptics pass-through port at isa0060/serio4/input0 [ 35.400578] psmouse serio5: trackpoint: IBM TrackPoint firmware: 0x0e, buttons: 3/3 [ 148.433264] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 148.438244] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 148.442802] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 148.444135] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 148.457697] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 148.457707] psmouse serio4: issuing reconnect request [ 195.273729] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 195.278710] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 195.283225] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 195.284554] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 195.290365] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 195.290372] psmouse serio4: issuing reconnect request [ 705.102333] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 4 [ 705.103636] psmouse serio4: TouchPad at isa0060/serio4/input0 lost sync at byte 1 [ 705.127931] psmouse serio4: TouchPad at isa0060/serio4/input0 - driver resynced. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/896922 Title: Lenovo L520 - "psmouse.c: touchpad at isa0060/serio4/input0 lost sync" and stops working for seconds To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/896922/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
