After grub menu system not start, i muststart the System over the recovery mode.

[Patrick Kasper]

After the last apt upgrade, will the System not start.
In the recovery mode start the system but the GUI run only in the X11 session.
And my second screen will never be detect.

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: linux-image-5.11.0-25-generic 5.11.0-25.27
ProcVersionSignature: Ubuntu 5.11.0-25.27-generic 5.11.22
Uname: Linux 5.11.0-25-generic x86_64
ApportVersion: 2.20.11-0ubuntu65.1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: patrick 2333 F.... pulseaudio
 /dev/snd/controlC2: patrick 2333 F.... pulseaudio
 /dev/snd/controlC0: patrick 2333 F.... pulseaudio
CasperMD5CheckResult: unknown
Date: Thu Aug 26 14:59:54 2021
InstallationDate: Installed on 2019-03-08 (901 days ago)
InstallationMedia: Kubuntu 19.04 "Disco Dingo" - Alpha amd64 (20190124)
MachineType: System manufacturer System Product Name
ProcEnviron:
 LANGUAGE=de_AT:de
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=de_AT.UTF-8
 SHELL=/bin/bash
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-25-generic root=UUID=f477375b-c0ec-4383-9340-ed5d17ce2df7 ro recovery nomodeset dis_ucode_ldr
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-5.11.0-25-generic N/A
 linux-backports-modules-5.11.0-25-generic N/A
 linux-firmware 1.197.3
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/26/2018
dmi.bios.release: 5.13
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1601
dmi.board.asset.tag: Default string
dmi.board.name: ROG ZENITH EXTREME
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1601:bd10/26/2018:br5.13:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnROGZENITHEXTREME:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.sku: SKU
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Patrick Kasper (patrick100xcd)]

Exactly the same problem occurs with the 5.11.0-31-generic kernel, only the audio output does not work. I think I'm déjà vu. https://bugzilla.kernel.org/show_bug.cgi?id=207515

[Patrick Kasper (patrick100xcd)]

Just for comparison, the same PC but a different distribution with the 5.13.12 kernel.
I found not in the Ubuntu /proc/modules amdgpu or radeon, but in the other Linux installation.
I believe thats is the problem.