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#1 2022-04-07 15:26:59

xa
Member
Registered: 2022-04-07
Posts: 3

X380 Yoga randomly boots in tablet mode, no internal keyboard input

So I installed Arch on a Thinkpad X380 Yoga with LUKS on a partition some weeks ago and since then face the issue of, sometimes, not being able to enter a password upon booting. When this happens, I have to connect a USB keyboard to enter the password. After starting up, the internal keyboard works again, with the keyboard lights turned on that were previously turned off at the encrypt stage. After reading journalctl, I discovered the following line:

kernel: thinkpad_acpi: Tablet mode switch found (type: GMMS), currently in tablet mode

Whenever I was able to enter the password, this was set to "laptop mode". Whenever I couldn't do that, it was set to "tablet mode". After reading the German ubuntuusers article on Thinkpad ACPI and the docs of thinkpad-acpi, I created the following file:

$ cat /etc/modprobe.d/thinkpad_acpi.conf 
options thinkpad_acpi hotkey_tablet_mode=0

However, I still sometimes can't use the internal keyboard and later find out that it was tablet mode, again.

Do you have an idea why this happens and how I can, e.g., force laptop mode for booting?

When shutting down, the laptop is always in laptop mode. From /etc/mkinitcpio.conf:

MODULES=(atkbd ext4)
[...]
HOOKS=(base udev keyboard modconf block encrypt filesystems fsck)

I removed the autodetect hook in hope that it improves the situation, but it does not.

Last edited by xa (2022-04-07 15:30:27)

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#2 2022-09-10 11:14:16

xa
Member
Registered: 2022-04-07
Posts: 3

Re: X380 Yoga randomly boots in tablet mode, no internal keyboard input

Almost six months later and I still experience this bug. Therefore, I opened a task on Arch Linux' bugs page, and will also report the bug upstream, if needed.

https://bugs.archlinux.org/task/75866

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#3 2022-10-26 12:32:08

xa
Member
Registered: 2022-04-07
Posts: 3

Re: X380 Yoga randomly boots in tablet mode, no internal keyboard input

For some 2 weeks I'm now on Fedora and there everything is working fine. So this issue is related to Arch Linux/my setup, but since I don't use it anymore, I think this thread may be closed.

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