Re: [gentoo-user] radeon screen resolution

Mick <michaelkintzios@×××××.com> wrote:

> On Monday 28 Dec 2015 21:05:56 john wrote:
>
> > Hmm,
> > thanks, I have now tried an old monitor and its screen
> > resolution was good (ie 1920x1080) so I think it's the monitor.
> > I have a R9 280 radeon card which is pretty new but the monitor is
> > very new (display port only, acer xb240h model) so I guess it's
> > something do do with that, perhaps EDID but not really sure. The
> > whole graphics stack is pretty bemusing and I would love to make
> > sense of it all.
>
> Have a look here for setting up your card:
>
> https://wiki.gentoo.org/wiki/Amdgpu
>
>
> and here for setting up the driver
> 'x11-drivers/xf86-video-displaylink' to get your DP going:
>
> https://wiki.gentoo.org/wiki/DisplayLink

I don't think that this is necessary. The Acer XB240H doesn't have a
DisplayLink connector. It has a DisplyPort connector and for this you
don't need a special driver. 

IIRC you also don't need a special kernel option to use DisplayPort.

--
Regards
wabe