Public bug reported: After upgrading the kernel from 5.13.0-48 to 5.15.0-41, my external monitor connected via HDMI wasn't detected. According to xrandr the HDMI-1 output is "disconnected".
If I select the 5.13.0-52 kernel from the boot menu, then the HDMI monitor works fine. Unfortunately, I am not able to test connecting using a different cable type. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.15.0-41-generic 5.15.0-41.44~20.04.1 ProcVersionSignature: Ubuntu 5.13.0-52.59~20.04.1-generic 5.13.19 Uname: Linux 5.13.0-52-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.24 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: i3 Date: Thu Jul 14 12:53:37 2022 InstallationDate: Installed on 2020-11-05 (615 days ago) InstallationMedia: Ubuntu-Server 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) SourcePackage: linux-signed-hwe-5.15 UpgradeStatus: No upgrade log present (probably fresh install) ** Affects: linux-signed-hwe-5.15 (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug focal uec-images -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-signed-hwe-5.15 in Ubuntu. https://bugs.launchpad.net/bugs/1981738 Title: HDMI display no longer able to connect after kernel upgrade Status in linux-signed-hwe-5.15 package in Ubuntu: New Bug description: After upgrading the kernel from 5.13.0-48 to 5.15.0-41, my external monitor connected via HDMI wasn't detected. According to xrandr the HDMI-1 output is "disconnected". If I select the 5.13.0-52 kernel from the boot menu, then the HDMI monitor works fine. Unfortunately, I am not able to test connecting using a different cable type. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.15.0-41-generic 5.15.0-41.44~20.04.1 ProcVersionSignature: Ubuntu 5.13.0-52.59~20.04.1-generic 5.13.19 Uname: Linux 5.13.0-52-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.24 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: i3 Date: Thu Jul 14 12:53:37 2022 InstallationDate: Installed on 2020-11-05 (615 days ago) InstallationMedia: Ubuntu-Server 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731) SourcePackage: linux-signed-hwe-5.15 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-5.15/+bug/1981738/+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