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Reverting just the FW_START hunk avoids it, and so does keeping the GPU awake until shutdown, so I suspect the PDC being asleep at system off. I've posted a fix, "drm/msm/adreno: Leave the GPU RSC awake for system poweroff": https://lore.kernel.org/all/20261003193518.13811-1-me@michaelburch.net/ On this machine it resolves the reboot: poweroff and reboot work on AC and battery, and deep suspend still drops the GPU votes. There may be a better approach, e.g. waking only the RSC; happy to test. Thanks, Michael