Public bug reported:
Summary
After upgrading linux-firmware-amd-graphics from
20240318.git3b128b60-0ubuntu3.3 to 20240318.git3b128b60-0ubuntu3.4 (2026-11-08
02:08 per /var/log/dpkg.log), Linux has no display after GRUB on a Radeon RX
9060 XT. Downgrading to 0ubuntu3.3 restores the display.
Environment
- Linux Mint 22.3 Cinnamon (Ubuntu noble base)
- GPU: Gigabyte Radeon RX 9060 XT 16GB, PCI ID 1002:7590, connected via
DisplayPort
- CPU: Intel i5-12400F; board: Gigabyte B760M Gaming Plus WiFi DDR4
- Kernels tested, all failing: 7.0.0-42-generic, 7.0.0-38-generic,
6.17.0-35-generic
What happens
Boot splash, then a black screen, and the monitor reports no DP signal. Windows
11 on a separate drive boots fine, and reseating hardware changed nothing.
Booting with nomodeset works.
Log from the failing boot (journalctl -b -1 -k)
- Loading DMUB firmware via PSP: version=0x07002F00
- failed to load ucode DMCUB(0x3D)
- Wait for DMUB auto-load failed: 3
- repeated: *ERROR* Error queueing DMUB command: status=2
- repeated: *ERROR* dc_dmub_srv_log_diagnostic_data: DMCUB error - collecting
diagnostic data
- Also in that boot: psp gfx command LOAD_IP_FW(0x6) failed, response status
0x11, and "SMU driver if version not matched" (driver 0x2e, firmware 0x32). I
have not compared these two lines with a working boot.
Working boots on 0ubuntu3.3 (Oct 13, Oct 14, and after the downgrade on Nov 8)
- Loading DMUB firmware via PSP: version=0x0A000800, no "failed to load ucode"
or DMCUB errors
Observations
- The 0ubuntu3.4 changelog lists "amdgpu: update dmcub fw for dcn32 and dcn401".
- With 3.4 installed, /lib/firmware/amdgpu/dcn_4_0_1_dmcub.bin.zst is a symlink
to dcn_3_2_0_dmcub.bin.zst. I have not checked this on 3.3.
Workaround used
Installed the 0ubuntu3.3 .deb from the Launchpad build, ran apt-mark hold,
rebuilt the initramfs (update-initramfs -u) for the installed kernels.
7.0.0-42-generic then booted normally without nomodeset.
Request
Please revert or fix the DMCUB firmware update in 0ubuntu3.4 for DCN 4.0.1
(Navi 44), as was done in 0ubuntu3.2 for sienna cichlid (LP: #2163303).
0ubuntu3.4 was released for LP: #2168847, so a fix should keep that platform
working.
** Affects: linux-firmware-amd-graphics (Ubuntu)
Importance: Undecided
Status: New
** Tags: regression-update
** Tags added: regression-update
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https://bugs.launchpad.net/bugs/2173706
Title:
[regression] linux-firmware-amd-graphics
20240318.git3b128b60-0ubuntu3.4: DMUB firmware fails to load on Radeon
RX 9060 XT, no display after GRUB; 0ubuntu3.3 works
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