This bug was fixed in the package linux-oem - 4.15.0-1017.20
---------------
linux-oem (4.15.0-1017.20) bionic; urgency=medium
* linux-oem: 4.15.0-1017.20 -proposed tracker (LP: #1787544)
* Bluetooth: Redpine: Bionics: L2test transfer is failed to start in Ubuntu
18.04 (LP: #1781895)
- SAUCE: Bluetooth: btrsi: fix l2test data transfer issue
* [Redpine] Upgrades to improve throughput and stability (LP: #1782070)
- SAUCE: rsi: Fix for low throughput issue
- SAUCE: rsi: Set wowlan flag while writing wowlan config parameters
- SAUCE: rsi: Add debug support for wowlan wakeup confirmation
- Bluetooth: btrsi: rework dependencies
- rsi: fix error path handling in SDIO probe
- rsi: Add null check for virtual interfaces in wowlan config
- SAUCE: rsi: Fix for wowlan hibernate resume issue
- SAUCE: rsi: Firmware assert (version 2)
- SAUCE: rsi: Fix for WoWLAN wakeup in security mode.
- SAUCE: rsi: Optimizing virtual interfaces
- SAUCE: rsi: disable p2p device mode support
-- Chia-Lin Kao (AceLan) <acelan....@canonical.com> Fri, 17 Aug 2018
15:53:57 +0800
** Changed in: linux-oem (Ubuntu Bionic)
Status: Invalid => Fix Released
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https://bugs.launchpad.net/bugs/1779802
Title:
Touchpad of ThinkPad P52 failed to work with message "lost sync at
byte"
Status in HWE Next:
New
Status in HWE Next artful series:
New
Status in HWE Next bionic series:
New
Status in linux package in Ubuntu:
Incomplete
Status in linux-oem package in Ubuntu:
Fix Released
Status in linux source package in Artful:
Invalid
Status in linux-oem source package in Artful:
Invalid
Status in linux source package in Bionic:
Fix Released
Status in linux-oem source package in Bionic:
Fix Released
Bug description:
On ThinkPad P52:
touchpad failed to work and reports:
[ 2.713396] input: ETPS/2 Elantech TrackPoint as
/devices/platform/i8042/serio1/input/input8
[ 2.725328] input: ETPS/2 Elantech Touchpad as
/devices/platform/i8042/serio1/input/input5
And lots of errors printed out:
[ 19.468387] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.474455] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.480657] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.487665] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.494682] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.494685] psmouse serio1: issuing reconnect request
[ 19.679895] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.686285] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.692642] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.699858] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
[ 19.706873] psmouse serio1: Touchpad at isa0060/serio1/input0 lost sync at
byte 6
And the middle button can not work too.
[Impact]
On ThinkPad P52, Elantech touchpad had sync issue then failed to work.
Middle button was not enabled too.
[Fix]
With two upstream patches, elantech touchpad works fine with middle button.
[Test Case]
Touchpad moves fine, left/right/middle buttons works fine. scroll mode
works fine.
[Regression Potential]
Very low, Just enable specific hardware support.
??? (1):
Input: elantech - fix V4 report decoding for module with middle key
Aaron Ma (1):
Input: elantech - enable middle button of touchpads on ThinkPad P52
drivers/input/mouse/elantech.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
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