@kaihengfeng, can you perhaps build a 5.9.xx kernel with:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d823346876a970522ff9e4d2b323c9b734dcc4de
 added for @dacto from comment 25 to test ?

His device gets intel-vbtn SW_TABLET_MODE support enabled based on the
chassis-type, yet it seems to always report SW_TABLET_MODE=1, I want to
know if the mentioned commit fixes this. This commit was a workaround
introduced before we switched to an allow list (which includes certain
chassis-types). This workaround was reverted after switching to the
allow list, but since @dacto is still seeing this with 5.9.10 it looks
like we may need the workaround even with the new allow-list approach.

@dacto, 2 questions:

1. What happens with 5.9.10 if you fold the 2-in-1 into tablet mode and
then back into laptop/clamshell mode again, does that fix the kbd and
touchpad not working ?

2. Can you provide an acpidump of your device? Run:

sudo acpidump -o acpidump.HP-Convertible-x360-11-ab0XX

And then attach the generated acpidump.HP-Convertible-x360-11-ab0XX file
here, or send it directly to me: [email protected] .

###

So looking closer at the difference between 5.4.75 and 5.9.10, 5.9.10 has:
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=21d64817c72470ed69483f59279ce557c0658826

Which 5.4.75 does not have, so this strongly suggests that despite
switching to the allow list we still need the workaround for some HP
models and it should be re-added (undoing the revert / undoing the
dropping of the workaround).

I can take care of getting this re-added but first I would like to see
some confirmation that this is indeed the problem.

Ideally you (@dacto) would test a 5.9.10 (or .11 or .12) kernel with the
patch added, but I can also confirm that this patch needs to be re-added
by looking at an acpidump.

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https://bugs.launchpad.net/bugs/1894017

Title:
  Keyboard not working

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