Re: [Bug 2076935] Re: Black screen after loading amdgpu module

Hello!

I posted additional requested info, but it was closed for inactivity.

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https://bugs.launchpad.net/bugs/2076935

Title:
Black screen after loading amdgpu module

Status in linux package in Ubuntu:
Expired

Bug description:
Hello,

I have freshly installed Ubuntu 24.04.
lsb_release -rd
No LSB modules are available.
Description: Ubuntu 24.04 LTS
Release: 24.04
cat /proc/version_signature
Ubuntu 6.8.0-38.38-generic 6.8.8

When kernel loads amdgpu module the monitor shows black screen,
monitor still works and system runs. I'm able to see a login prompt
only after blacklisted amdgpu module, but I need that for X.

And the same issue with booting from installation media, I was able to see a picture on monitor only after adding nomodeset boot option for kernel by manually editing grub menu entry.
---
ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version k6.8.0-40-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.28.1-0ubuntu3.1
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D8p', '/dev/snd/hwC0D0', '/dev/snd/controlC0', '/dev/snd/by-path', '/dev/snd/pcmC1D0p', '/dev/snd/pcmC1D0c', '/dev/snd/pcmC1D2c', '/dev/snd/hwC1D0', '/dev/snd/controlC1'] failed with exit code 1:
CRDA: N/A
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
Card1.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer'
Card1.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer'
CasperMD5CheckResult: pass
CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read kernel buffer failed: Operation not permitted
DistroRelease: Ubuntu 24.04
InstallationDate: Installed on 2024-08-12 (2 days ago)
InstallationMedia: Ubuntu-Server 24.04 LTS "Noble Numbat" - Release amd64 (20240423)
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
Package: linux (not installed)
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=tmux-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 simpledrmdrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-40-generic root=UUID=42a5dfb2-8f60-470b-9ba3-e2435881f2d1 ro ipv6.disable=1
ProcVersionSignature: Ubuntu 6.8.0-40.40-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 20240318.git3b128b60-0ubuntu2.1
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
Tags: noble
Uname: Linux 6.8.0-40-generic x86_64
UnreportableReason: This report is about a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom lxd plugdev sudo users
_MarkForUpload: False
acpidump:

dmi.bios.date: 07/31/2019
dmi.bios.release: 5.14
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P3.20
dmi.board.name: B450M-HDV R4.0
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:bvnAmericanMegatrendsInc.:bvrP3.20:bd07/31/2019:br5.14:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnB450M-HDVR4.0: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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