I can confirm that with the generic 5.11 kernel shutdown works correctly - the laptop powers off completely.
Workaround: - Installation of Generic kernel sudo apt install linux-generic-hwe-20.04 Note: It may be necessary to also manually install the corresponding linux-modules and linux-modules-extra packages. - Reboot into the Generic (5.11) kernel from the GRUB menu - Removal + Purging of OEM kernel dpkg -l | grep linux-oem Perform a 'sudo apt remove --purge' on all listed packages (in my case there were three listed) as well as on the associated linux-modules package. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-5.10 in Ubuntu. https://bugs.launchpad.net/bugs/1940665 Title: Lenovo Carbon X1 9th gen no longer powers off Status in linux-oem-5.10 package in Ubuntu: Confirmed Bug description: Ubuntu 20.04.3 LTS linux-oem-5.10: 5.10.0-1044.46 Power off system, either through GUI or by shutdown -P now Expected result: System powers completely off What happens: System seems to be powering completely off. Screen goes black, but computer is still running, getting hot and using battery. Have to press power button for 4 seconds to power completely off. Solution so far: Use linux-generic-something To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-oem-5.10/+bug/1940665/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
