Yea sorry man, I clicked on that down arrow to see the options, and when I moved the mouse with my finger on the trackpad it clicked, I guess... Hahaha.
On August 23, 2026 7:50:21 p.m. UTC, admit nothing <[email protected]> wrote: >had me going there for a sec roger, and don't know how you had the >privileges to make that change... but i'm sure Kao will take care of it >since you assigned to to them ;) > >too funny. > >we all want this fixed yesterday. > >-- >You received this bug notification because you are subscribed to a >duplicate bug report (2164850). >https://bugs.launchpad.net/bugs/2163303 > >Title: > [regression] linux-firmware 20240318.git3b128b60-0ubuntu2.29 causes > half-screen corruption/black screens on AMD Navi 21; 0ubuntu2.26 works > >Status in linux-firmware package in Ubuntu: > Confirmed >Status in linux-firmware source package in Noble: > Fix Released > >Bug description: > SRU Justification > ================= > [Impact] > > AMD Navi 21 graphics cards (RX 6800 / 6800 XT / 6900 XT) show an exact > half-screen region of vertical corruption, or black screens on boot, > after updating linux-firmware to 20240318.git3b128b60-0ubuntu2.28 or > .29 on Ubuntu 24.04. > > The corruption follows the active display and reproduces with a single > HDMI monitor. It shows on all tested kernels (6.8, 6.14, 6.17, 7.0). > Downgrading linux-firmware to 0ubuntu2.26/.27 fixes the display. The > regression follows the firmware package, not the kernel. > > Error log from dmesg: > > > [drm] Wait for DMUB auto-load failed: 3 > [drm] DMUB hardware initialized: version=0x01000000 > > amdgpu: SMU: I'm not done with your previous command: > SMN_C2PMSG_66:0x00000028 SMN_C2PMSG_82:0x00000000 > amdgpu: Failed to enable gfxoff! > amdgpu: Failed to retrieve enabled ppfeatures! > > > [Fix] > > The sienna_cichlid DMCUB firmware was updated in upstream commit > bec4fd18 ("amdgpu: DMCUB updates forvarious AMDGPU ASICs"), which > changed the ucode version from 0x2020020 to 0x1000000. That broke > display output on Navi 21. Upstream reverted the binary 8 days later > in commit 96af55bd ("amdgpu: Revert sienna cichlid dmcub firmware > update"). Noble backported bec4fd18 but not the revert, so the bad > 0x1000000 blob shipped in 0ubuntu2.28/.29. > > This SRU cherry-picks the upstream revert 96af55bd3, merged in linux- > firmware release 20240909. It restores amdgpu/sienna_cichlid_dmcub.bin > to the previous 114036-byte blob (ucode 0x2020020), byte-identical to > what shipped in the working 0ubuntu2.26/.27. > > [Test Plan] > > 1. Install the updated linux-firmware from -proposed, rebuild > initramfs, reboot: > > $ sudo apt install linux-firmware > $ sudo update-initramfs -u > $ sudo reboot > > 2. Verify the firmware blob is restored: > > $ md5sum /lib/firmware/amdgpu/sienna_cichlid_dmcub.bin > > Expected: 114036-byte blob, ucode 0x2020020, md5 > fb312158b04675d9689803a34c06b0f6 (same as 0ubuntu2.26). > > 3. Boot to the desktop and check the display renders correctly with > one monitor and with a 3-monitor setup. > > 4. Check dmesg for clean DMUB init: > > $ dmesg | grep -i dmub > > Without patch: version=0x01000000, "DMUB auto-load failed: 3", > half-screen corruption or black screen. > With patch: version=0x02020020, no DMUB errors, normal display. > > [Where problems could occur] > > Could break amdgpu display init on Navi 21 (sienna_cichlid). > > If the reverted firmware is a mismatch for a driver version that > expected the 0x1000000 blob, DMUB init could fail on some Navi 21 > boards. That would show up as a black screen at boot or a "Wait for > DMUB auto-load failed" message on those GPUs. > > The change is limited to one DMCUB binary. It does not touch other > ASICs, other firmware files, or the kernel. This exact blob shipped in > 0ubuntu2.26/.27 with no reported issues. > > ================= > Ubuntu 24.04.4 LTS, AMD Navi 21 / RX 6800-class GPU. > > System worked normally before the linux-firmware update on 2026-08-11 > 23:44, when 20240318.git3b128b60-0ubuntu2.27 was upgraded to > 20240318.git3b128b60-0ubuntu2.29. > > With .29, the display has an exact half-screen region of vertical > corruption; the mouse cursor remains correctly rendered above the > corruption. It reproduces with a single HDMI monitor, so it is not > dependent on DisplayPort or a three-monitor configuration. The > corruption also follows the active monitor rather than one physical > monitor/output. > > Both 6.8.0-137-generic and 7.0.0-28-generic reproduce the problem with > .29. amdgpu.dcdebugmask=0x1 removes the half-screen corruption with > fewer displays, but enabling the third monitor then causes all > displays to go black; 0x41 prevents the graphical login from appearing > with three monitors. Recovery/nomodeset displays correctly. > > Downgrading only linux-firmware to 20240318.git3b128b60-0ubuntu2.26, > rebuilding initramfs and returning to normal AMDGPU settings makes the > original three-monitor setup work again. No kernel/Mesa downgrade was > necessary. > > Regression: > > GOOD: > Ubuntu 24.04.4 > kernel 6.8.0-137-generic > linux-firmware 20240318.git3b128b60-0ubuntu2.26 > 3 monitors > normal amdgpu configuration > => works correctly > > BAD: > Ubuntu 24.04.4 > kernel 6.8.0-137-generic > linux-firmware 20240318.git3b128b60-0ubuntu2.29 > => half-screen display corruption > > BAD: > Ubuntu 24.04.4 > kernel 7.0.0-28-generic > linux-firmware 20240318.git3b128b60-0ubuntu2.29 > => same corruption > > Therefore the regression follows the linux-firmware version > rather than the tested kernel version. > > ProblemType: Bug > DistroRelease: Ubuntu 24.04 > Package: linux-firmware 20240318.git3b128b60-0ubuntu2.26 > ProcVersionSignature: Ubuntu 6.8.0-137.137-generic 6.8.12 > Uname: Linux 6.8.0-137-generic x86_64 > ApportVersion: 2.28.3-0ubuntu0.1 > Architecture: amd64 > CasperMD5CheckResult: pass > CurrentDesktop: Regolith:GNOME-Flashback:GNOME > Date: Wed Aug 12 10:37:59 2026 > Dependencies: firmware-sof-signed 2023.12.1-1ubuntu1.11 > InstallationDate: Installed on 2022-06-19 (1515 days ago) > InstallationMedia: Ubuntu 22.04 LTS "Jammy Jellyfish" - Release amd64 > (20220419) > MachineType: Micro-Star International Co., Ltd. MS-7C95 > ProcFB: 0 amdgpudrmfb > ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.8.0-137-generic > root=UUID=515405b8-ecf6-4cf5-9820-3c1621b18748 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-6.8.0-137-generic N/A > linux-backports-modules-6.8.0-137-generic N/A > linux-firmware 20240318.git3b128b60-0ubuntu2.26 > SourcePackage: linux-firmware > UpgradeStatus: No upgrade log present (probably fresh install) > dmi.bios.date: 02/26/2021 > dmi.bios.release: 5.17 > dmi.bios.vendor: American Megatrends International, LLC. > dmi.bios.version: 2.71 > dmi.board.asset.tag: To be filled by O.E.M. > dmi.board.name: B550M PRO-VDH WIFI (MS-7C95) > dmi.board.vendor: Micro-Star International Co., Ltd. > dmi.board.version: 1.0 > dmi.chassis.asset.tag: To be filled by O.E.M. > dmi.chassis.type: 3 > dmi.chassis.vendor: Micro-Star International Co., Ltd. > dmi.chassis.version: 1.0 > dmi.modalias: > dmi:bvnAmericanMegatrendsInternational,LLC.:bvr2.71:bd02/26/2021:br5.17:svnMicro-StarInternationalCo.,Ltd.:pnMS-7C95:pvr1.0:rvnMicro-StarInternationalCo.,Ltd.:rnB550MPRO-VDHWIFI(MS-7C95):rvr1.0:cvnMicro-StarInternationalCo.,Ltd.:ct3:cvr1.0:skuTobefilledbyO.E.M.: > dmi.product.family: To be filled by O.E.M. > dmi.product.name: MS-7C95 > dmi.product.sku: To be filled by O.E.M. > dmi.product.version: 1.0 > dmi.sys.vendor: Micro-Star International Co., Ltd. > >To manage notifications about this bug go to: >https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/2163303/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2163303 Title: [regression] linux-firmware 20240318.git3b128b60-0ubuntu2.29 causes half-screen corruption/black screens on AMD Navi 21; 0ubuntu2.26 works To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-firmware/+bug/2163303/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
