Hi again, I was able to narrow the problem down. I noticed that indeed a new kernel version has been installed today causing the problem. Output of dpkg.log:
cat /var/log/dpkg.log | grep "^2022-01-.*\ installed\ .*linux-image-generic" 2022-01-05 09:35:21 status installed linux-image-generic-hwe-20.04:amd64 5.11.0.44.48~20.04.22 2022-01-12 16:42:17 status installed linux-image-generic-hwe-20.04:amd64 5.11.0.46.51~20.04.23 2022-01-19 13:47:05 status installed linux-image-generic-hwe-20.04:amd64 5.13.0.27.29~20.04.13 When I boot with the previous kernel version 5.11.0.46, everything works fine. So the bug is apparently introduced in version 5.13. -- 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/1951717 Title: Ubuntu 21.10 not booting with 2 screens attached Status in linux package in Ubuntu: Confirmed Bug description: Hi, I recently bought a desktop PC with the following hardware: Mainboard: ASRock B560 Pro4 Processor: Intel Core i5-11600K RAM: Corsair Vengeance LPX 16GB (2x8GB) Storage: WD_Black SN850 1TB WDS100T1X0E Graphics: Processor Graphic (Intel UHD 750) I installed Ubuntu 21.10 and noticed the following problem: It freezes at booting (right after GRUB), if there are 2 screens connected. The mainboard has 1xHDMI and 1xDP, any of them connected alone works fine, but with both, it just freezes. I tried booting 21.10 from a live USB, resulting in exactly the same problem (not starting if 2 screens connected). I should also mention, that connecting 2 screens after the boot process works completely fine. It is just a problem when booting. I am for sure not the only one with the problem, I found this problem in another forum (I currently cannot find it anymore, unfortunately), where someone had exactly the same problem but with different hardware (I remember some Nvidia Graphic Card). They reported that the problem is not there with Ubuntu 21.04.3, so I tried that and it really works without any problem. Hope this helps to prevent the error in future Ubuntu versions, I am sticking to 21.04 for now. Best regards Lukas --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.21 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 20.04 InstallationDate: Installed on 2021-11-18 (62 days ago) InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819) IwConfig: lo no wireless extensions. enp0s31f6 no wireless extensions. docker0 no wireless extensions. MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. Package: linux (not installed) ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-27-generic root=UUID=cbb0140b-aa6c-458e-9070-a714a230896e ro quiet splash ProcVersionSignature: Ubuntu 5.13.0-27.29~20.04.1-generic 5.13.19 RelatedPackageVersions: linux-restricted-modules-5.13.0-27-generic N/A linux-backports-modules-5.13.0-27-generic N/A linux-firmware 1.187.24 RfKill: Tags: focal wayland-session Uname: Linux 5.13.0-27-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd nordvpn plugdev sambashare sudo vboxusers _MarkForUpload: True dmi.bios.date: 04/16/2021 dmi.bios.release: 5.19 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: P1.80 dmi.board.name: B560 Pro4 dmi.board.vendor: ASRock dmi.chassis.asset.tag: To Be Filled By O.E.M. dmi.chassis.type: 3 dmi.chassis.vendor: To Be Filled By O.E.M. dmi.chassis.version: To Be Filled By O.E.M. dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrP1.80:bd04/16/2021:br5.19:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB560Pro4:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:skuToBeFilledByO.E.M.: dmi.product.family: To Be Filled By O.E.M. dmi.product.name: To Be Filled By O.E.M. dmi.product.sku: To Be Filled By O.E.M. dmi.product.version: To Be Filled By O.E.M. dmi.sys.vendor: To Be Filled By O.E.M. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1951717/+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
