drivers – Graphics died after dist-upgrade

I updated an hour ago (Ubuntu 20.04.1(Linux lite 5.2) xfce4). At first instead of steam there were artifacts but everything else worked stable, and after reboot startx also died along with all graphics. There is an error when starting it:

(drm:si_lb_parse (radeon)) ERROR Invalid GFX packet3: 0x50

How to fix this not the system? I need to finish the job right away.