I'm using Ubuntu 24.04 with Full Disk Encryption and TPM, running the Snap kernel: pc-kernel 6.8.0-48.48.
When I connect an external display via HDMI to my laptop, the entire system locks up for approximately 30 seconds, and the external display is never detected. However, if I boot the machine with the external HDMI display already connected, there are no issues, then the display works as expected. The system also locks up when i unplug the HDMI cable. kernel: i915 0000:00:02.0: [drm] *ERROR* flip_done timed out kernel: i915 0000:00:02.0: [drm] *ERROR* [CRTC:131:pipe B] commit wait timed out kernel: i915 0000:00:02.0: [drm] *ERROR* flip_done timed out kernel: i915 0000:00:02.0: [drm] *ERROR* [CONNECTOR:245:HDMI-A-1] commit wait timed out kernel: i915 0000:00:02.0: [drm] *ERROR* flip_done timed out kernel: i915 0000:00:02.0: [drm] *ERROR* [PLANE:82:plane 1B] commit wait timed out kernel: i915 0000:00:02.0: [drm] *ERROR* flip_done timed out kernel: i915 0000:00:02.0: [drm] *ERROR* [PLANE:127:cursor B] commit wait timed out I have attached the complete kernel logs from journald for further analysis. ** Attachment added: "kernel journald logs" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2080598/+attachment/5836688/+files/kernel-journald.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2080598 Title: linux-image-6.8.0-44-generic breaks HDMI output (-41 works) Status in linux package in Ubuntu: Confirmed Bug description: linux-image-6.8.0-44-generic breaks HDMI output. When I connect to the HDMI port on this laptop the external screen flickers briefly then I get "no signal". With linux-image-6.8.0-41-generic the HDMI out works as normal. DisplayPort over USB C seems to work, but only one of my two external monitors support that. There is no obvious error message in dmesg when this happens. I tried with both KDE and Gnome X11 and Wayland sessions (all 4 combinations). None of that makes a difference. I'm running in PRIME on-demand mode, and on this laptop the external display outputs are connected to the Intel graphics (not the nvidia graphics). That *is* configurable in UEFI settings, but I haven't tried changing that. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.8.0-44-generic 6.8.0-44.44 ProcVersionSignature: Ubuntu 6.8.0-44.44-generic 6.8.12 Uname: Linux 6.8.0-44-generic x86_64 ApportVersion: 2.28.1-0ubuntu3.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/seq: tmgarn 4545 F.... pipewire /dev/snd/controlC0: tmgarn 4547 F.... wireplumber /dev/snd/controlC1: tmgarn 4547 F.... wireplumber CasperMD5CheckResult: pass CurrentDesktop: KDE Date: Fri Sep 13 08:42:02 2024 InstallationDate: Installed on 2023-05-30 (472 days ago) InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223) MachineType: Dell Inc. Precision 7670 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-44-generic root=UUID=aee0f2dc-6cba-4c78-a07d-0844d6efb552 ro crashkernel=600M PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-6.8.0-44-generic N/A linux-backports-modules-6.8.0-44-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.3 SourcePackage: linux UpgradeStatus: Upgraded to noble on 2024-09-02 (11 days ago) dmi.bios.date: 09/15/2023 dmi.bios.release: 1.16 dmi.bios.vendor: Dell Inc. dmi.bios.version: 1.16.0 dmi.board.name: 091YVN dmi.board.vendor: Dell Inc. dmi.board.version: A02 dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvr1.16.0:bd09/15/2023:br1.16:svnDellInc.:pnPrecision7670:pvr:rvnDellInc.:rn091YVN:rvrA02:cvnDellInc.:ct10:cvr:sku0B2A: dmi.product.family: Precision dmi.product.name: Precision 7670 dmi.product.sku: 0B2A dmi.sys.vendor: Dell Inc. modified.conffile..etc.default.apport: [modified] mtime.conffile..etc.default.apport: 2024-09-03T18:02:55.663299 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2080598/+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
