Confirming this affects the RX 6950 XT (Navi 21 / Sienna Cichlid) as well, and adding a data point: on my system the regression did not just cause display corruption — it caused a full boot hang with no display AND no network (SSH unreachable), which took a while to diagnose since it initially looks like a much broader boot failure rather than "just" a GPU/firmware issue.
System: TUXEDO OS 24.04.4 LTS (Ubuntu 24.04 noble base), AMD Ryzen 5 9600X, discrete AMD Radeon RX 6950 XT (Navi 21, PCI ID 1002:73a5). Kernel 6.17.0-124040-tuxedo, also reproduced on 6.17.0-122035-tuxedo (regression follows the firmware package, not the kernel, confirming what's already been established here). linux-firmware was auto-upgraded from 0ubuntu2.27 to 0ubuntu2.29 overnight. Next normal boot: both monitors stayed black, and the machine was completely unreachable on the network (no DHCP lease, no SSH). Booting with nomodeset (recovery mode) worked fine and had working networking, which is what let me get in and diagnose this remotely. dmesg sequence on the broken boot (kernel 6.17.0-124040-tuxedo, linux- firmware 0ubuntu2.29): amdgpu 0000:03:00.0: amdgpu: [drm] Display Core v3.2.340 initialized on DCN 3.0 amdgpu 0000:03:00.0: amdgpu: [drm] DP-HDMI FRL PCON supported amdgpu 0000:03:00.0: amdgpu: [drm] Wait for DMUB auto-load failed: 3 amdgpu 0000:03:00.0: amdgpu: [drm] DMUB hardware initialized: version=0x01000000 ... amdgpu 0000:03:00.0: amdgpu: SMU: I'm not done with your previous command: SMN_C2PMSG_66:0x00000029 SMN_C2PMSG_82:0x00000000 amdgpu 0000:03:00.0: amdgpu: Failed to disable gfxoff! (repeats every ~4s for several minutes) amdgpu 0000:03:00.0: amdgpu: ring sdma3 timeout, signaled seq=9, emitted seq=11 amdgpu 0000:03:00.0: amdgpu: Starting sdma3 ring reset amdgpu 0000:03:00.0: [drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring kiq_0.2.1.0 test failed (-110) amdgpu 0000:03:00.0: [drm:amdgpu_ring_test_helper [amdgpu]] *ERROR* ring sdma3 test failed (-110) amdgpu 0000:03:00.0: amdgpu: Ring sdma3 reset failed amdgpu 0000:03:00.0: amdgpu: GPU reset begin! amdgpu 0000:03:00.0: amdgpu: MODE1 reset amdgpu 0000:03:00.0: amdgpu: GPU smu mode1 reset amdgpu 0000:03:00.0: amdgpu: GPU mode1 reset failed amdgpu 0000:03:00.0: amdgpu: ASIC reset failed with error, -62 for drm dev, 0000:03:00.0 amdgpu 0000:03:00.0: amdgpu: GPU reset end with ret = -62 amdgpu 0000:03:00.0: amdgpu: GPU Recovery Failed: -62 (loops) systemd[1]: systemd-logind.service: Watchdog timeout (limit 3min)! kernel: INFO: task kworker/u48:4:252 blocked for more than 122 seconds. kernel: Workqueue: amdgpu-reset-dev drm_sched_job_timedout [gpu_sched] kernel: Call Trace: kernel: dma_fence_default_wait+0x1f0/0x250 kernel: dma_fence_wait_timeout+0x13a/0x170 kernel: drm_sched_stop+0x13e/0x1e0 [gpu_sched] kernel: amdgpu_device_halt_activities.isra.0+0x1b3/0x270 [amdgpu] kernel: amdgpu_device_gpu_recover+0x115/0x400 [amdgpu] kernel: amdgpu_job_timedout+0x1c1/0x340 [amdgpu] kernel: drm_sched_job_timedout+0x6d/0x150 [gpu_sched] Because several kworkers stay permanently blocked in D-state waiting on GPU fences, and sddm.service pulls in systemd-udev-settle.service, SDDM never actually starts (hence the black screens), and NetworkManager never finishes bringing up the wired NIC either (hence no network/SSH). So on this card the bug isn't just cosmetic corruption, it's effectively an unbootable/unreachable system unless you know to boot with nomodeset. Confirmed the firmware-level root cause independently: /lib/firmware/amdgpu/sienna_cichlid_dmcub.bin.zst is the only sienna_cichlid_* firmware file that differs between 0ubuntu2.26 and 0ubuntu2.29 (all of ce/me/mec/mec2/pfp/rlc/sdma/smc/sos/ta/vcn are byte-identical). In 0ubuntu2.26 it's a symlink to beige_goby_dmcub.bin.zst (sha256 e095010915468c30598c1118b0d955762e49f08f9e835fe5d1f9ecb0788fb016); in 0ubuntu2.29 it's a standalone 37726-byte file (sha256 25bea6217254e43387dfdf444d8f90c26929ade2dd793c5db7fb9b37ab83e3fe). This matches what's already been established in this thread (ucode 0x1000000 from bec4fd18 vs the reverted 0x2020020). Workaround confirmed working: sudo apt-get install --allow-downgrades linux-firmware=20240318.git3b128b60-0ubuntu2.26 sudo apt-mark hold linux-firmware sudo reboot Clean boot afterwards, zero amdgpu errors in the journal, both monitors back, network up immediately. Happy to test the -proposed fix once it's available and report back. -- 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
