[amdgpu] /dev/dri/card0 is missing

[po4ta]

the second monitor is not connected on laptop MSI Modern 14 B4MW

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-84.94-generic 5.4.133
Uname: Linux 5.4.0-84-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: pass
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Sep 10 11:52:09 2021
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Renoir [1002:1636] (rev c3) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. [MSI] Renoir [1462:12c8]
InstallationDate: Installed on 2021-09-09 (1 days ago)
InstallationMedia: Ubuntu-Server 20.04.3 LTS "Focal Fossa" - Release amd64 (20210824)
MachineType: Micro-Star International Co., Ltd. Modern 14 B4MW
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-84-generic root=UUID=54f1902f-8670-4bf3-9b25-b3ae9ba6e80c ro net.ifnames=0 biosdevname=0
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/02/2021
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: E14DKAMS.114
dmi.board.asset.tag: Default string
dmi.board.name: MS-14DK
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: REV:1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrE14DKAMS.114:bd06/02/2021:svnMicro-StarInternationalCo.,Ltd.:pnModern14B4MW:pvrREV1.0:rvnMicro-StarInternationalCo.,Ltd.:rnMS-14DK:rvrREV1.0:cvnMicro-StarInternationalCo.,Ltd.:ct10:cvrN/A:
dmi.product.family: Modern
dmi.product.name: Modern 14 B4MW
dmi.product.sku: 14DK.1
dmi.product.version: REV:1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.105-3~20.04.1
version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.3-0ubuntu0.3~20.04.1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.11-1ubuntu1~20.04.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Daniel van Vugt (vanvugt)]

Thanks for the bug report. Your second monitor is not working apparently because you are using the 'fbdev' Xorg driver, which shouldn't happen. It looks like that happened because the proper 'modesetting' driver failed to find a graphics device at /dev/dri/card0. So it would appear this is a kernel bug.

Please try removing the 'biosdevname=0' kernel parameter and tell us if that resolves the problem.

Please also try booting an older kernel version and tell us if that fixes it.

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]