Public bug reported:
Apport reports 2.26 installed because I downgraded to recover. The
regression is in 20240318.git3b128b60-0ubuntu2.29 on noble-updates. Same
kernel across all boots; linux-firmware was the only graphics-related
package in the upgrade. On 2.27, DMUB initializes at version=0x02020020.
On 2.29, it loads as version=0x01000000 with "Wait for DMUB auto-load
failed: 3", producing vertical stripe corruption across the right half
of the display at GDM and a session that dies about half a second after
login. Downgrading to 2.26 restores correct behavior. Logs from both
boots attached.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-firmware 20240318.git3b128b60-0ubuntu2.26
ProcVersionSignature: Ubuntu 7.0.0-30.30~24.04.1-generic 7.0.12
Uname: Linux 7.0.0-30-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: main 6781 F.... wireplumber
/dev/snd/controlC1: main 6781 F.... wireplumber
/dev/snd/seq: main 6775 F.... pipewire
CRDA: N/A
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Aug 25 10:08:25 2026
Dependencies: firmware-sof-signed 2023.12.1-1ubuntu1.11
InstallationDate: Installed on 2025-03-20 (524 days ago)
InstallationMedia: Ubuntu 24.04.1 LTS "Noble Numbat" - Release amd64
(20240827.1)
MachineType: Micro-Star International Co., Ltd. MS-7D43
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/usr/bin/zsh
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-7.0.0-30-generic
root=/dev/mapper/ubuntu--vg-ubuntu--lv ro quiet splash vt.handoff=7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-7.0.0-30-generic N/A
linux-backports-modules-7.0.0-30-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.26
SourcePackage: linux-firmware
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/19/2023
dmi.bios.release: 5.27
dmi.bios.vendor: American Megatrends International, LLC.
dmi.bios.version: 1.D0
dmi.board.asset.tag: Default string
dmi.board.name: PRO B660M-A WIFI DDR4 (MS-7D43)
dmi.board.vendor: Micro-Star International Co., Ltd.
dmi.board.version: 1.0
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Micro-Star International Co., Ltd.
dmi.chassis.version: 1.0
dmi.modalias:
dmi:bvnAmericanMegatrendsInternational,LLC.:bvr1.D0:bd07/19/2023:br5.27:svnMicro-StarInternationalCo.,Ltd.:pnMS-7D43:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnPROB660M-AWIFIDDR4(MS-7D43):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:skuDefaultstring:pfaDefaultstring:
dmi.product.family: Default string
dmi.product.name: MS-7D43
dmi.product.sku: Default string
dmi.product.version: 1.0
dmi.sys.vendor: Micro-Star International Co., Ltd.
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble regression-update wayland-session
** Attachment added: "broken-fw-2.29.log"
https://bugs.launchpad.net/bugs/2165038/+attachment/5995222/+files/broken-fw-2.29.log
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https://bugs.launchpad.net/bugs/2165038
Title:
linux-firmware 2.29 breaks amdgpu DMUB init on Navi 21 (1002:73bf),
corrupt display and session crash
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