Hey, I also had that issue with tablet mode and documented my fix here:
https://forum.chrultrabook.com/t/modern-chromebook-setup-guide-with-thunderbolt-fixes/
Fixing Tablet Mode:
- Tablet mode mostly works, but there appears to be an issue with the ec firmware that stops the keyboard from being turned off in tablet mode. To get around this I installed linuxflip-git from the aur and created the following:
- /etc/linuxflip/tablet
rmmod atkbd
- /etc/linuxflip/laptop
modprobe atkbd
- Then I made them executable with chmod +x
Following this, I created and enabled a systemd service for it:
/etc/systemd/system/linuxflip.service[Unit] Description=Start linuxflip at boot [Service] Type=simple RemainAfterExit=yes ExecStart=/usr/bin/linuxflip /etc/linuxflip/tablet /etc/linuxflip/laptop [Install] WantedBy=multi-user.target