I don't know if there can be a conflict between the updating/upgrading when 
including the backporting for debian itself and the TDE updating/upgrading.

On Saturday 25 January 2020 14:03:41 deloptes wrote:
> mb850063@... wrote:
> > I installed the amd firmware.
> >
> > Then, as root, the desktop worked with no slowlyness problem, videos
> > worked normally and synchronized with the sound (yet before, they worked
> > better than as user).
>
> Can you check the prmissions and if the user is in the video group?
>
> $ ls -al /dev/dri/
> total 0
> drwxr-xr-x   3 root root        100 Jan 16 21:20 .
> drwxr-xr-x  20 root root      14420 Jan 24 20:30 ..
> drwxr-xr-x   2 root root         80 Jan 16 21:20 by-path
> crw-rw----+  1 root video  226,   0 Jan 25 13:50 card0
> crw-rw----+  1 root render 226, 128 Jan 16 21:20 renderD128
>
>
>
>
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