*** This bug is a duplicate of bug 2148538 ***
https://bugs.launchpad.net/bugs/2148538
Adding an Arch Linux per-boot bisect that confirms the same root cause
on the same device `1002:15bf` (Phoenix1 Radeon 780M, gfx1103).
## Bisect (kernel version vs `ring gfx_0.0.0 timeout` per boot)
```
7.0.12-arch1-1 10 boots, 0 hangs
7.0.13-arch1-1 0, 0, 3 hangs <- regression introduced
7.0.13-arch1-2 0 hangs (1 boot)
7.0.14-arch1-1 2,10,0,0,0,1,1,1 hangs
7.1.2-arch3-1 3, 13 hangs
```
Regression appears with the 7.0.12 -> 7.0.13 bump. Latent and
uptime/state-dependent — a clean boot can run hours before the first
hang, consistent with TLB-fence accumulation in the MES ring.
## Firmware ruled out
Phoenix MES blobs (`gc_11_0_0_mes.bin`, `gc_11_0_0_mes1.bin`,
`gc_11_0_0_mes_2.bin`) are byte-identical between `linux-firmware`
20260519-1 and 20260622-1. A boot on 2026-06-26 ran 7.0.13-1 + the newer
firmware for ~13h with 0 hangs; the next boot (same kernel + same
firmware) hung. The kernel bump is the trigger, not the firmware.
## Kernel log signature
```
ring gfx_0.0.0 timeout, signaled seq=..., emitted seq=...
Process kwin_wayland pid ... thread kwin_wayla:cs0
Starting gfx_0.0.0 ring reset
MES failed to respond to msg=RESET
failed to reset legacy queue
reset via MES failed and try pipe reset -110
Ring gfx_0.0.0 reset failed
GPU reset begin!. Source: 1
MES failed to respond to msg=REMOVE_QUEUE
failed to unmap legacy queue
[drm:gfx_v11_0_hw_fini] *ERROR* failed to halt cp gfx
MODE2 reset
GPU reset succeeded, trying to resume
[drm] device wedged, but no recovery needed
```
KWin (Wayland) then loses its GL context (`GL_CONTEXT_LOST`, `A graphics
reset not attributable to the current GL context occurred`). 30 ring
timeouts / 28 MES failures / 28 "GPU reset succeeded" in 10 days.
## Workaround in use
`amdgpu.cwsr_enable=0` on the kernel command line — effective on this
system, keeps the desktop fully functional. Confirmed across ROCm#5590,
Framework community#71364/52.
This bisect supports the TLB-fence/MES-ring-flooding root cause and the
`e9f58ff991dd` fix direction. Thanks for the work on this.
---
*Reported from an Arch Linux workstation — AMD Phoenix1 (Radeon 780M,
gfx1103), kernel 7.1.2-arch3-1, KDE Plasma 6.7 / KWin Wayland. Adding
this bisect as cross-distro confirmation of the same root cause on
device 1002:15bf.*
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https://bugs.launchpad.net/bugs/2147367
Title:
amdgpu: MES firmware intermittently unresponsive on Phoenix APU
(gfx1103), leading to unrecoverable GPU hang on Framework 16
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