[gentoo-user] Troubshooting AMD Radeon Vega system freeze

[Grant Edwards <grant.b.edwards@gmail.com>]

Starting about a week ago, my AMD system (AMD Ryzen 5 3400G with
Radeon Vega Graphics) has been freezing up multiple times per day --
always when in active use with X11. Before that, it had been reliable
since assembled (about 5 years ago).

Ctrl-Alt-Backspace does nothing
Ctrl-Alt-F1 does nothing

The SysRq key does work (I'm able to sync/remount/reboot), but I'm
unable to get the console restored using SysRq keys once it freezes.

When it's not frozen, I can use SysRq to kill X11 and switch back to
the FB console, but I can't figure out how to get console output to
show up: I see the SysRq commands being echoed on the console, but all
output from them is going into the syslog.

The CPU was not at all not heavily loaded, and temps and fans speeds
are not noticably different than when the machine is idle.

I've run MemTest86+ for 12 hours: no errors.

I've tried dropping back fomm kernel 6.1.121 to 6.1.118: no change.

Next, I suppose I should start rolling back X11 drivers?

--
Grant