Hi everyone,
I did not look into this forum since when I created this entry. So far the
problem did not occur on my machine with Ubuntu 20.04.
However, the problem became active again just now (I still have 20.04,
but unfortunately I do not know if any kernel update or something else
happened recently, that causes the problem to be back).
The behavior is exactly the same as initially described. Booting not
working with 2 screens attached.
BR Lukas
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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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.
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