Anno domini 2020 Thu, 23 Jan 22:33:10 +0100
 mb850063@... scripsit:
> Hello,
> 
> No, the files don't xist.
> 
> And as far as the ATI support is concerned, i understand that the problem 
> would be with a kernel module ?
> 
> By now, i use to start with kernel 5.4
> 
> but still have the possibility, via grub, to start with kernel 4.19.
> 
> Doing so makes absolutely no difference as far as the slowness is concerned.

IMO it's not a kernel probblem, but an Xorg problem. You can try to deinstall Xorg and reinstall the previouse version. If it works, set it on hold.

nik


> 
> On Thursday 23 January 2020 21:24:16 deloptes wrote:
> > Dr. Nikolaus Klepp wrote:
> > > Usually it's selfconfigured, but you could check if /etc/X11/xorg.conf or
> > > /etc/X11/xorg.conf.d exist. If yes, it might be a good idea to delete
> > > these and try again. If they don't exist, you'll have to ask the
> > > searchengine of your trust (sorry, don't have any ATI GPU here)
> >
> > AMD discontinued support for older cards and firmware might not work is
> > what I know. I experienced this on one ubuntu, but might be something else
> > - worth checking.
> >
> >
> >
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