apport information ** Tags added: apport-collected
** Description changed: With Kernel 6.8.0-40 (upgraded yesterday) a) the external screen connected to my Lenovo T14 ThinkPad randomly turns black for a few seconds and then recovers, b) the laptop cannot be used after the lid has been closed. The power LED is lit (no stand-by) but screen is blank. No reaction to any key, also cannot open a terminal with Ctrl-Alt-Fx. Only a hard reset is possible. None of these problems occur with Kernel 6.5.0-45. I have previously attempted to use Ubuntu 24.04 LTS but faced exactly the same issues, therefore I re-installed Ubuntu 22.04 LTS which was working stable until yesterdays kernel upgrade. While working with 24.04 LTS for a few weeks I also noted frequent, random and complete system freezes which made it unusable with that laptop. $ lsb_release -rd Description: Ubuntu 22.04.4 LTS Release: 22.04 ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-6.8.0-40-generic 6.8.0-40.40~22.04.3 ProcVersionSignature: Ubuntu 6.8.0-40.40~22.04.3-generic 6.8.12 Uname: Linux 6.8.0-40-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.6 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: XFCE Date: Tue Aug 20 10:27:32 2024 InstallationDate: Installed on 2024-08-05 (14 days ago) InstallationMedia: Xubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64 (20240216.1) SourcePackage: linux-signed-hwe-6.8 UpgradeStatus: No upgrade log present (probably fresh install) + --- + ProblemType: Bug + ApportVersion: 2.20.11-0ubuntu82.6 + Architecture: amd64 + AudioDevicesInUse: + USER PID ACCESS COMMAND + /dev/snd/controlC0: oligri 1236 F.... pulseaudio + CRDA: N/A + CasperMD5CheckResult: pass + CurrentDesktop: XFCE + DistroRelease: Ubuntu 22.04 + InstallationDate: Installed on 2024-08-05 (27 days ago) + InstallationMedia: Xubuntu 22.04.4 LTS "Jammy Jellyfish" - Release amd64 (20240216.1) + MachineType: LENOVO 20S0007LMX + Package: linux (not installed) + ProcFB: 0 i915drmfb + ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-40-generic root=/dev/mapper/vgxubuntu-root ro quiet splash vt.handoff=7 + ProcVersionSignature: Ubuntu 6.8.0-40.40~22.04.3-generic 6.8.12 + RelatedPackageVersions: + linux-restricted-modules-6.8.0-40-generic N/A + linux-backports-modules-6.8.0-40-generic N/A + linux-firmware 20220329.git681281e4-0ubuntu3.31 + Tags: jammy + Uname: Linux 6.8.0-40-generic x86_64 + UpgradeStatus: No upgrade log present (probably fresh install) + UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo + _MarkForUpload: True + dmi.bios.date: 08/26/2020 + dmi.bios.release: 1.13 + dmi.bios.vendor: LENOVO + dmi.bios.version: N2XET23W (1.13 ) + dmi.board.asset.tag: Not Available + dmi.board.name: 20S0007LMX + dmi.board.vendor: LENOVO + dmi.board.version: SDK0J40697 WIN + dmi.chassis.asset.tag: No Asset Information + dmi.chassis.type: 10 + dmi.chassis.vendor: LENOVO + dmi.chassis.version: None + dmi.ec.firmware.release: 1.7 + dmi.modalias: dmi:bvnLENOVO:bvrN2XET23W(1.13):bd08/26/2020:br1.13:efr1.7:svnLENOVO:pn20S0007LMX:pvrThinkPadT14Gen1:rvnLENOVO:rn20S0007LMX:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20S0_BU_Think_FM_ThinkPadT14Gen1: + dmi.product.family: ThinkPad T14 Gen 1 + dmi.product.name: 20S0007LMX + dmi.product.sku: LENOVO_MT_20S0_BU_Think_FM_ThinkPad T14 Gen 1 + dmi.product.version: ThinkPad T14 Gen 1 + dmi.sys.vendor: LENOVO ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/2077405/+attachment/5812094/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2077405 Title: External screen flashing and cannot use after laptop lid closed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2077405/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
