Public bug reported:
Description:
After upgrading linux-firmware from 20240318.git3b128b60-0ubuntu2.27 to
0ubuntu2.29 on 2026-08-14, the display output became corrupted: the
right portion of the screen shows dense vertical blue/green/white
stripes. The corruption appears as soon as the GDM login screen shows up
and persists on the desktop.
Hardware:
GPU: Gigabyte Radeon RX 6900 XT (Navi 21, 1002:73af), amdgpu driver
Motherboard: ASUS TUF GAMING X570-PLUS (WI-FI), BIOS 1407
CPU: AMD Ryzen 9 3900X
Monitors: Dell U2719D (2560x1440 via DisplayPort), LG (via HDMI)
OS: Ubuntu 24.04 LTS
What I observed:
The corruption is not present in UEFI BIOS or GRUB — it only appears once
amdgpu takes over the display.
Screenshots taken while the stripes are visible are completely clean, so the
rendered framebuffer is correct and only the display output is affected.
Reproduces on both monitors, on both DP and HDMI, and with only a single
monitor connected — so it is not cable, port or monitor related.
Reproduces identically on kernel 7.0.0-28-generic and on 6.17.0-40-generic, so
it is not a kernel regression.
GPU temperatures are normal (edge 48C, junction 59C, mem 52C) and there are no
amdgpu errors, ring timeouts or GPU resets in dmesg.
Forcing a fixed memory clock (power_dpm_force_performance_level=manual,
pp_dpm_mclk=3) does not help.
Relevant dmesg line:
amdgpu 0000:0c:00.0: [drm] Wait for DMUB auto-load failed: 3
Steps to reproduce:
Install linux-firmware 20240318.git3b128b60-0ubuntu2.29 on a Navi 21 system.
Reboot.
Vertical stripes appear on the right part of the screen from the login screen
onward.
Workaround:
Downgrading to linux-firmware 20240318.git3b128b60-0ubuntu2.26, running
sudo update-initramfs -u and rebooting fixes the issue completely. Re-
upgrading to 2.29 brings it back.
Expected: clean display output, as with 2.26/2.27.
Actual: corrupted display output on the right portion of the screen.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-firmware 20240318.git3b128b60-0ubuntu2.26
ProcVersionSignature: Ubuntu 7.0.0-28.28~24.04.1-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
CRDA: N/A
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 16 08:34:31 2026
Dependencies: firmware-sof-signed 2023.12.1-1ubuntu1.11
InstallationDate: Installed on 2026-01-11 (217 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
MachineType: System manufacturer System Product Name
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/bin/bash
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic
root=UUID=8c531cd3-a6bb-451c-b85a-dce6260d430d 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-7.0.0-28-generic N/A
linux-backports-modules-7.0.0-28-generic N/A
linux-firmware 20240318.git3b128b60-0ubuntu2.26
SourcePackage: linux-firmware
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2020
dmi.bios.release: 5.14
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1407
dmi.board.asset.tag: Default string
dmi.board.name: TUF GAMING X570-PLUS (WI-FI)
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1407:bd04/01/2020:br5.14:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnTUFGAMINGX570-PLUS(WI-FI):rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:pfaTobefilledbyO.E.M.:
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
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug noble wayland-session
** Summary changed:
- вертикальные полосы на правой части экрана после загрузки Ubuntu
+ Vertical stripes on right half of screen after boot with RX 6900 XT (Navi 21)
— regression in linux-firmware 2.29
** Description changed:
- Что стоит написать в описании, у тебя как раз всё есть:
+ Description:
- вертикальные полосы на правой части экрана после загрузки Ubuntu, в BIOS/GRUB
чисто
- воспроизводится на обоих мониторах (Dell U2719D по DP, LG по HDMI) и с одним
подключённым
- скриншоты чистые — глючит только вывод
- RX 6900 XT (Navi 21), amdgpu
- появилось после обновления linux-firmware 2.27 → 2.29 (14.08.2026)
- откат на 2.26 проблему устраняет
- воспроизводится на ядрах 7.0.0-28 и 6.17.0-40 одинаково
- в dmesg: Wait for DMUB auto-load failed: 3
+ After upgrading linux-firmware from 20240318.git3b128b60-0ubuntu2.27 to
+ 0ubuntu2.29 on 2026-08-14, the display output became corrupted: the
+ right portion of the screen shows dense vertical blue/green/white
+ stripes. The corruption appears as soon as the GDM login screen shows up
+ and persists on the desktop.
+
+ Hardware:
+
+ GPU: Gigabyte Radeon RX 6900 XT (Navi 21, 1002:73af), amdgpu driver
+ Motherboard: ASUS TUF GAMING X570-PLUS (WI-FI), BIOS 1407
+ CPU: AMD Ryzen 9 3900X
+ Monitors: Dell U2719D (2560x1440 via DisplayPort), LG (via HDMI)
+ OS: Ubuntu 24.04 LTS
+
+ What I observed:
+
+ The corruption is not present in UEFI BIOS or GRUB — it only appears once
amdgpu takes over the display.
+ Screenshots taken while the stripes are visible are completely clean, so the
rendered framebuffer is correct and only the display output is affected.
+ Reproduces on both monitors, on both DP and HDMI, and with only a single
monitor connected — so it is not cable, port or monitor related.
+ Reproduces identically on kernel 7.0.0-28-generic and on 6.17.0-40-generic,
so it is not a kernel regression.
+ GPU temperatures are normal (edge 48C, junction 59C, mem 52C) and there are
no amdgpu errors, ring timeouts or GPU resets in dmesg.
+ Forcing a fixed memory clock (power_dpm_force_performance_level=manual,
pp_dpm_mclk=3) does not help.
+
+ Relevant dmesg line:
+
+ amdgpu 0000:0c:00.0: [drm] Wait for DMUB auto-load failed: 3
+
+ Steps to reproduce:
+
+ Install linux-firmware 20240318.git3b128b60-0ubuntu2.29 on a Navi 21 system.
+ Reboot.
+ Vertical stripes appear on the right part of the screen from the login screen
onward.
+
+ Workaround:
+
+ Downgrading to linux-firmware 20240318.git3b128b60-0ubuntu2.26, running
+ sudo update-initramfs -u and rebooting fixes the issue completely. Re-
+ upgrading to 2.29 brings it back.
+
+ Expected: clean display output, as with 2.26/2.27.
+ Actual: corrupted display output on the right portion of the screen.
ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: linux-firmware 20240318.git3b128b60-0ubuntu2.26
ProcVersionSignature: Ubuntu 7.0.0-28.28~24.04.1-generic 7.0.12
Uname: Linux 7.0.0-28-generic x86_64
ApportVersion: 2.28.3-0ubuntu0.1
Architecture: amd64
CRDA: N/A
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 16 08:34:31 2026
Dependencies: firmware-sof-signed 2023.12.1-1ubuntu1.11
InstallationDate: Installed on 2026-01-11 (217 days ago)
InstallationMedia: Ubuntu 24.04.3 LTS "Noble Numbat" - Release amd64
(20250805.1)
MachineType: System manufacturer System Product Name
ProcEnviron:
- LANG=en_US.UTF-8
- PATH=(custom, no user)
- SHELL=/bin/bash
- TERM=xterm-256color
- XDG_RUNTIME_DIR=<set>
+ LANG=en_US.UTF-8
+ PATH=(custom, no user)
+ SHELL=/bin/bash
+ TERM=xterm-256color
+ XDG_RUNTIME_DIR=<set>
ProcFB: 0 amdgpudrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic
root=UUID=8c531cd3-a6bb-451c-b85a-dce6260d430d 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-7.0.0-28-generic N/A
- linux-backports-modules-7.0.0-28-generic N/A
- linux-firmware 20240318.git3b128b60-0ubuntu2.26
+ linux-restricted-modules-7.0.0-28-generic N/A
+ linux-backports-modules-7.0.0-28-generic N/A
+ linux-firmware 20240318.git3b128b60-0ubuntu2.26
SourcePackage: linux-firmware
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2020
dmi.bios.release: 5.14
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1407
dmi.board.asset.tag: Default string
dmi.board.name: TUF GAMING X570-PLUS (WI-FI)
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1407:bd04/01/2020:br5.14:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnTUFGAMINGX570-PLUS(WI-FI):rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:skuSKU:pfaTobefilledbyO.E.M.:
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
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https://bugs.launchpad.net/bugs/2163591
Title:
Vertical stripes on right half of screen after boot with RX 6900 XT
(Navi 21) — regression in linux-firmware 2.29
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/2163591/+subscriptions
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