Comment # 27 on bug 1195142 from Carlos Sancho

(In reply to Andreas Vetter from comment #10)
> (In reply to Takashi Iwai from comment #5)
> > I guess not, unless there is another urgent security fix coming up.
> > 
> > As a workaround, you can simply copy the old radeon module file from
> > 5.3.18-59.40 to *-43, e.g.
> >   # mkdir /lib/modules/5.3.18-*.43-default/updates
> >   # cp
> > /lib/modules/5.3.18-*.40-default/kernel/drivers/gpu/drm/radeon/radeon.ko*
> > /lib/modules/5.3.18-*.43-default/updates/
> >   # depmod 5.3.18-150300.59.43-default
> >   # mkinitrd
> 
> This workaround works for my 
> [AMD/ATI] Turks PRO [Radeon HD 6570/7570/8550 / R5 230]

That worked for me. I was doing a new clean installation and it failed to boot.
But since I had a backup of my old root partition I could boot up from that
backup, copy radeon module from the old kernel to the new one and then chroot
on the new system to do depmod and mkinitrd.

Thank you.