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
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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.
This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1951717
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.