Re: ATI radeon + modesetting

[Ludovic Courtès]

Hi Andy,

Andy Wingo <address@hidden> skribis:

> Recalling all of this history, I thought that perhaps a switch to
> modesetting could fix my radeon problems as well, and indeed, voilà,
> this patch fixes it:
>
> --- a/gnu/services/xorg.scm
> +++ b/gnu/services/xorg.scm
> @@ -117,7 +117,7 @@ Section \"Files\"
>    FontPath \"" font-adobe75dpi "/share/fonts/X11/75dpi\"
>    ModulePath \"" xf86-video-vesa "/lib/xorg/modules/drivers\"
>    ModulePath \"" xf86-video-fbdev "/lib/xorg/modules/drivers\"
> -  ModulePath \"" xf86-video-ati "/lib/xorg/modules/drivers\"
> +  # ModulePath \"" xf86-video-ati "/lib/xorg/modules/drivers\"
>    ModulePath \"" xf86-video-cirrus "/lib/xorg/modules/drivers\"
>    ModulePath \"" xf86-video-intel "/lib/xorg/modules/drivers\"
>    ModulePath \"" xf86-video-mach64 "/lib/xorg/modules/drivers\"

[...]

> I think I would like to apply this patch to Guix.  My only concern would
> be that perhaps there are people using older radeon cards that don't
> support Glamor; dunno.  I do see bugs around this area that suggest that
> the radeon driver is also slipping into disrepair, e.g.:
>
>   https://bugs.freedesktop.org/show_bug.cgi?id=102054
>
> But considering that the ATI driver was only added to the default
> modules a year ago in 3126fd8820e8c30e27ef978d66dced8763d04905, before
> our Xorg server configuration included the paths to the modesetting
> driver, perhaps the risk is low.  Any thoughts?

FWIW, given your analysis and the silence that ensued ;-), I think you
can go ahead and push this patch.

Eventually we should make this part of the code more modular so that
users can specify a list of driver packages and easily add/remove one.

Thanks,
Ludo’.