bug#40538: installer: Support uvesafb to install on machines without KMS.

[pelzflorian (Florian Pelz)]

On Sun, Apr 12, 2020 at 08:37:02AM +0200, Bengt Richter wrote:
> Did you mean s/ksmcon/kmscon/ ?

Yes.


> If that is a descendant of David Herrmann's work,
> I wonder if it wouldn't just look for /sys/class/drm/card0 and, if found,
> ignore /dev/fb0 and the uvesafb (along with the latter's user stuff 
> requirements).
> […]
> I had thought that some version of Wayland/weston had a back end that
> could run on plain /dev/fb0, and if so could provide Xwayland for X11 clients.
> 
> Of course, if /sys/class/drm/card0 is available, Wayland will prefer that,
> and you're home free for all kinds of GUIs.

Well only with uvesafb I get a /dev/fb0 device and with /dev/fb0 I can
use xf86-video-fbdev or kmscon.  It seems kmscon has multiple
backends, I do not know if it can work in other ways, but by default
it does not work without uvesafb.

Regards,
Florian