external screen no longer support native resolution

[Suvayu Ali]

On Tue, Jul 21, 2015 at 02:32:08PM +0700, Frederic Muller wrote:
> Hi!
> 
> I just upgraded to F22 and my external monitor (a Koios 24" 1920x1200)
> no longer works in its native resolution. I can only get 1280 x 768 to
> display.
> 
> Everything was working well before. My video chip is the Intel HD
> Graphics 5500 (Broadwell GT2) (the laptop is a X1 Carbon 3rd generation).
> 
> GNOME display settings does offer the native resolution but it just
> doesn't work (I get an screen switched off).
> 
> How would you troubleshooting this?

The first step would be to see what xrandr gives you (try -q).  If that
works, try to get it working with xrandr first.

Hope this helps,

-- 
Suvayu

Open source is the future. It sets us free.