Public bug reported: I am running Ubuntu 24.04.3 LTS on the laptop Lenovo Legion 5 15IAH7, and connected to an external monitor via HDMI.
Since upgrading to the 6.8.0-71 kernel, it stopped recognizing the monitor. 6.8.0-64 works fine. 6.8.0-78 doesn't work. Possibly related Ask Ubuntu question, even though rolling back to the older Linux version didn't fix their problem: https://askubuntu.com/questions/1553967/ ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.8.0-64-generic 6.8.0-64.67 ProcVersionSignature: Ubuntu 6.8.0-64.67-generic 6.8.12 Uname: Linux 6.8.0-64-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ori 3942 F.... wireplumber /dev/snd/controlC0: ori 3942 F.... wireplumber /dev/snd/seq: ori 3938 F.... pipewire CRDA: N/A CasperMD5CheckResult: pass CurrentDesktop: GNOME-Flashback:GNOME Date: Sun Aug 24 12:04:55 2025 InstallationDate: Installed on 2022-06-07 (1174 days ago) InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 (20220419) MachineType: LENOVO 82RC ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-64-generic root=UUID=9c10dc40-0b10-40a8-ae9a-232f55df57dd ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-6.8.0-64-generic N/A linux-backports-modules-6.8.0-64-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.15 SourcePackage: linux UpgradeStatus: Upgraded to noble on 2025-06-29 (56 days ago) dmi.bios.date: 01/24/2022 dmi.bios.release: 1.32 dmi.bios.vendor: LENOVO dmi.bios.version: J2CN32WW dmi.board.asset.tag: NO Asset Tag dmi.board.name: LNVNB161216 dmi.board.vendor: LENOVO dmi.board.version: NO DPK dmi.chassis.asset.tag: NO Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Legion 5 15IAH7 dmi.ec.firmware.release: 1.32 dmi.modalias: dmi:bvnLENOVO:bvrJ2CN32WW:bd01/24/2022:br1.32:efr1.32:svnLENOVO:pn82RC:pvrLegion515IAH7:rvnLENOVO:rnLNVNB161216:rvrNODPK:cvnLENOVO:ct10:cvrLegion515IAH7:skuLENOVO_MT_82RC_BU_idea_FM_Legion515IAH7: dmi.product.family: Legion 5 15IAH7 dmi.product.name: 82RC dmi.product.sku: LENOVO_MT_82RC_BU_idea_FM_Legion 5 15IAH7 dmi.product.version: Legion 5 15IAH7 dmi.sys.vendor: LENOVO ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug noble -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2121303 Title: Laptop doesn't recognize monitor since 6.8.0-71 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2121303/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
