The screencast tool cannot record the flickering, so I have to use my phone for capturing.
** Attachment added: "bug-2007994.mp4" https://bugs.launchpad.net/ubuntu/+source/linux-signed-hwe-5.19/+bug/2007994/+attachment/5648974/+files/bug-2007994.mp4 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.19 in Ubuntu. https://bugs.launchpad.net/bugs/2007994 Title: Ubuntu 22.04 ThinkPad X13 Yoga Gen2 Kernel 5.19 Causes Screen Flickering Status in linux-signed-hwe-5.19 package in Ubuntu: New Bug description: Affected machine: Lenovo ThinkPad X13 Yoga Gen 2 OS: Ubuntu 22.04.2 LTS (64-bit) I did a dist-upgrade on Feb. 16th, and every boot after that results in screen flickering, I checked the dpkg history and assume that the kernel upgrade(5.19.0.32.33~22.04.9) is the one to blame. Then I tried to boot the machine with the former kernel(5.15.0.25.27), everything works fine again which confirms my assumption. The following line repeated to show up before entering the desktop: blacklist: Problem blacklisting hash (-13) ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-5.19.0-32-generic 5.19.0-32.33~22.04.1 ProcVersionSignature: Ubuntu 5.19.0-32.33~22.04.1-generic 5.19.17 Uname: Linux 5.19.0-32-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.11-0ubuntu82.3 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: Unity Date: Wed Feb 22 00:11:10 2023 InstallationDate: Installed on 2022-08-29 (176 days ago) InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1) SourcePackage: linux-signed-hwe-5.19 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-5.19/+bug/2007994/+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