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apport-collect 1916823
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: hirsute
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https://bugs.launchpad.net/bugs/1916823
Title:
Touchpad / keyboard don't work (randomly) after reboot on HP systems
Status in linux package in Ubuntu:
Incomplete
Bug description:
[Impact]
On some HP laptops (e.g. HP ZBook Fury 15/17 G7, HP EliteBook 850 G7,
HP ENVY x360 Convertible 15-cp0xxx), the touchpad / keyboard will
probably be disabled after reboot because the hp-wmi reports the
system is a tablet system but it's not a tablet system.
After libinput received "SW_TABLET_MODE", then it will disable the
keyboard and touchpad.
[Test case]
Test 200 times reboot with:
1. 5.10.0-1013-oem kernel:
- the SW_TABLET_MODE was detected at 72 round and the keyboard / touchpad
not work.
2. 5.10.0-1013-oem kernel + 67fbe02a5cebc3c653610f12e3c0424e58450153:
- the SW_TABLET_MODE is not be detected within 200 times reboot.
[Fix]
Cherry-pick commit 67fbe02a5cebc3c653610f12e3c0424e58450153.
It turns the tablet mode detection to off as default and could be enabled by
module parameter "enable_tablet_mode_sw".
[Regression potential]
It will break tablet detection on all HP laptops but user can enable it back
by adding module parameter.
If without this patch then a lot of HP new laptops (with newer HP BIOS) will
get the keyboard/touchpad not work after reboot.
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