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** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: artful
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https://bugs.launchpad.net/bugs/1736017
Title:
trackpad looses sync and hangs -- 16.10 worked, 17.10 does not
Status in linux package in Ubuntu:
Incomplete
Bug description:
I run Ubuntu 17.10 (Kubuntu) on a Thinkpad Yoga260 notebook. The
trackpad hangs regularly, typically after a few minutes of use. dmesg
reports "lost sync bytes".
Interestingly, this error already occurred in 16.04 (there are many
reports about this, e.g.
https://askubuntu.com/questions/922092/lifebook-e546-touchpad-on-
ubuntu-16-04), but my notebook works fine with 16.10 which I used for
about a year without any problems. Now that I updated it to 17.10 it
occurs again. Both 16.10 and 17.10 are now installed in parallel, but
the error only manifests when I boot into the latter.
I have tried proto=imps and proto=bare (module psmouse), but this does
not make a difference.
I report this here because this might be some kind of regression (or
coincidence).
Output from dmesg:
The trackpad detected es one from elantech:
[ 1.952397] psmouse serio1: elantech: assuming hardware version 4 (with
firmware version 0x4d1f04)
[ 1.967272] psmouse serio1: elantech: Synaptics capabilities query result
0x80, 0x14, 0x0c.
[ 1.982603] psmouse serio1: elantech: Elan sample query result 04, 01, 85
[ 802.847308] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 802.854537] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 802.862926] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 802.870528] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 802.877890] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 802.877899] psmouse serio1: issuing reconnect request
[ 805.772533] psmouse serio1: elantech: PS/2 packet [54 80 80 36 00 00]
[ 1008.218685] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 1008.226641] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 1008.234590] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 1008.242843] psmouse serio1: elantech: PS/2 packet [75 31 52 96 44 19]
[ 1008.242851] psmouse serio1: Touchpad at isa0060/serio1/input0 - driver
resynced.
[ 1008.251339] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 1008.258971] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 1008.265958] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 1008.273071] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 1008.280932] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 1008.280940] psmouse serio1: issuing reconnect request
etc...
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