I have encountered this issue as well, notably on Lenovo ThinkPad L15 Gen 2 (AMD) and L15 Gen 4 (Intel) devices. What also helps is unloading and then reloading the `atkbd` kernel driver.
The issue has also been reproduced by a number of Arch Linux users on L14 and L15 hardware of various generations: https://bbs.archlinux.org/viewtopic.php?id=274456&p=2 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.8 in Ubuntu. https://bugs.launchpad.net/bugs/1930745 Title: AT Translated Set 2 keyboard locks up seemingly randomly, infinitely repeating last pressed key Status in linux-signed-hwe-5.8 package in Ubuntu: Confirmed Bug description: I am running Ubuntu 20.04.2 LTS on my ThinkPad L15 laptop. From time to time the keyboard gets stuck / locked up. Sometimes it takes days to happen, sometimes it happens within a few minutes. It also does not seem to depend on the programs I am running, it seems to be entirely random. Basically, I am working/playing on the laptop and then suddenly the key I pressed last "gets stuck" and the keyboard does not respond any more. Other than that everything is running fine and I can still use the mouse and so on, but logging out does not resolve the issue and only a restart seems to work. I have also tried connecting a USB keyboard while the problem is occurring. The external keyboard is then detected and works fine, the built-in keyboard stops sending the signal and remains unresponsive. I have already mentioned the problem here, but it could not be resolved: https://ubuntuforums.org/showthread.php?t=2460675 I have also contacted Lenovo Hardware Support, and ran their tests, but those did not return anything, so they said it was not a hardware issue. My best guess is that it is a bug in the driver for the AT Translated Set 2 keyboard (I have the German keyboard layout), which is listed as supported hardware. Current and latest driver version is 1.0.1 ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.8.0-53-generic 5.8.0-53.60~20.04.1 ProcVersionSignature: Ubuntu 5.8.0-53.60~20.04.1-generic 5.8.18 Uname: Linux 5.8.0-53-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.18 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Thu Jun 3 13:45:29 2021 InstallationDate: Installed on 2020-12-29 (156 days ago) InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) SourcePackage: linux-signed-hwe-5.8 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.8/+bug/1930745/+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
