Upload debdiff.
** Changed in: libinput (Ubuntu)
Status: New => In Progress
** Changed in: libinput (Ubuntu)
Assignee: (unassigned) => Kai-Chuan Hsieh (kchsieh)
** Patch added: "debdiff for the new version"
https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1897553/+attachment/5414916/+files/libinput_1.15.5-1ubuntu1.debdiff
** Description changed:
[Impact]
- * ALPS new i2c touchpads have capabilities for reporting ABS_PRESSURE and
ABS_MT_PRESSURE event,
- However, it is very easy to over the default palm detect by pressure
threshold 130. When
- the threshold is achieved, the cursor will be stalled, and not be able to
keep following the
- finger's movement.
+ * ALPS new i2c touchpads have capabilities for reporting ABS_PRESSURE and
+ ABS_MT_PRESSURE event, However, it is very easy to over the default
+ palm detect by pressure threshold 130. When the threshold is achieved,
+ the cursor will be stalled, and not be able to keep following the
+ finger's movement.
[Test Case]
* For touchpad vid 0488, and have pressure capabilities.
- The pressure capability can be easily obtain by evtest tool, check the ABS
event type. There
- should be ABS_PRESSURE and ABS_MT_PRESSURE event.
+ The pressure capability can be easily obtain by evtest tool, there
+ should be ABS_PRESSURE and ABS_MT_PRESSURE event in ABS event type.
Test step:
Install libinput-tools
1. $ sudo apt install libinput-tools
2. $ sudo libinput measure touchpad-pressure
- 3. Generally move the finger, the pressure max should not exceed the palm
pressure detect
- threshold
+ 3. Generally move the finger, the pressure max should not exceed the
+ palm pressure detect threshold
[Regression Potential]
* It only impacts ALPS i2c models
* It won't impact the touchpad without capability to report pressure event.
- * For those touchpad with pressure capability will make the palm detect
pressure be less
- sensitive. However, ALPS said its firmware can support firmware labeling
palm detection, so it is
- okay that the palm detect pressure become less sensitive.
+ * For those touchpad with pressure capability will make the palm detect
+ pressure be less sensitive. However, ALPS said its firmware can support
+ firmware labeling palm detection, so it is okay that the palm detect
+ pressure become less sensitive.
[Other Info]
* The upstream commit has merged
https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/505
** Tags added: oem-priority originate-from-1891472 somerville
** Tags added: originate-from-1891979
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which is subscribed to libinput in Ubuntu.
https://bugs.launchpad.net/bugs/1897553
Title:
Palm detect pressure is too easy to trigger so that the cursor stalled
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