Something happened to my amd firmware for a ryzen3 3200g. A few weeks
ago, this machine made an uneventful transition to bookworm. I'd
originally installed bullseye and the non-free firmware package to get
the firmware for this setup. Everything was fine until yesterday, after
some bookworm updates and a reboot. No more video driver for X.
I've tried downgrading to stable from testing. No joy.
I've wiped /lib/firmware and reinstalled firmware-amd-graphics. No joy.
I've checked
I just booted ubuntu live and graphics are high resolution.
It feels like there's some setting in /proc or /sys that got changed
accidentally.
Any debugging tips?