*** This bug is a duplicate of bug 2173041 ***
https://bugs.launchpad.net/bugs/2173041
I can confirm that I experienced the same issue with my AMD Radeon RX
9060 XT 16GB on Linux Mint 22.3 (based on Ubuntu 24.04 Noble).
After updating `linux-firmware-amd-graphics` from
`20240318.git3b128b60-0ubuntu3.3` to `20240318.git3b128b60-0ubuntu3.4`,
my system failed to start the graphical session after reboot.
The symptoms were consistent with the reported issue:
- Black screen during boot.
- AMDGPU / DMUB-related display errors.
- Unable to reach the graphical login screen.
I managed to regain access to my desktop, but the issue persisted as a
potential problem on subsequent boots.
**Workaround confirmed:**
I downgraded the package to version `20240318.git3b128b60-0ubuntu3.3`
using:
`sudo apt install --allow-downgrades ./linux-firmware-amd-
graphics_20240318.git3b128b60-0ubuntu3.3_all.deb`
I then regenerated all initramfs images:
`sudo update-initramfs -u -k all`
And prevented the faulty version from being reinstalled:
`sudo apt-mark hold linux-firmware-amd-graphics`
After rebooting, the graphical session started normally again.
This confirms that downgrading to version `0ubuntu3.3` resolves the
issue on my hardware.
**System information:**
- GPU: AMD Radeon RX 9060 XT 16GB (RDNA4)
- OS: Linux Mint 22.3 (Ubuntu 24.04 Noble)
- Affected package: `linux-firmware-amd-graphics`
- Working version: `0ubuntu3.3`
- Affected version: `0ubuntu3.4`
I hope this additional report helps confirm the scope of the regression
and assists in finding a fix for RDNA4 GPUs.
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https://bugs.launchpad.net/bugs/2173040
Title:
linux-firmware-amd-graphics 0ubuntu3.4: dcn_4_0_1_dmcub.bin.zst is a
symlink to dcn_3_2_0_dmcub.bin.zst, RX 9070 XT DMUB load fails, no
display manager
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