Sponsored for both groovy and focal. ** Also affects: libinput (Ubuntu Focal) Importance: Undecided Status: New
-- You received this bug notification because you are a member of Desktop Packages, 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 Status in OEM Priority Project: New Status in libinput package in Ubuntu: In Progress Status in libinput source package in Focal: New Bug description: [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. [Test Case] * For touchpad vid 0488, and have pressure capabilities. 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 [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. [Other Info] * The upstream commit has merged https://gitlab.freedesktop.org/libinput/libinput/-/merge_requests/505 To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1897553/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp