HDMI screen not recognised after upgrade Gnome 3.20

[Josh Smith]

I upgraded to 3.20 and had some issues with the Nouveau drivers. Switched
to proprietary Nvidia drivers and it worked much better. I'm using a
DisplayPort3 however.

On Thu, 2 Jun 2016 at 12:20 Usama Akkad <uahello at gmail.com> wrote:

> Hello Thomas,
>
> For me sometimes the screen connected to HDMI is not recognized till I
> remove the cable and reinsert it after boot. Then I might need to press
> the key to activate external screen on my laptop.
>
> try "xrandr" command to get info about the recognized screens.
>
> Best wishes,
> Usama
>
> On 02-06-2016 18:16, Thomas SIMON wrote:
> > Hello all,
> >
> > I'm not sure if this is the right mailing list or if I should ask for
> > help somewhere else (I'm not sure it's a bug so far...). Basically, the
> > problem is simple, after upgrade of Ubuntu GNOME 16.04 with staging PPA,
> > my external screen was working (plugged in with HDMI), even after the
> > first restart. I went away and then switched off entirely my laptop,
> > when I came back, no way to get the external screen recognised by the
> > system (doesn't show on "Display" of system settings and doesn't show
> > with randr command).
> >
> > Then, well, I used ppa-purge, but that didn't change anything and tried
> > to plug in the screen with a VGA cable (and USB adaptor) and that still
> > wasn't recognised. Finally, I tested the screen with another laptop
> > (running Win 10) and that got the screen to work, so I'm pretty sure
> > it's an issue related to the upgrade to Gnome 3.20.
> >
> > Would anybody be able to advise please?
> >
> > Thanks a lot in advance,
> >
> > Thomas
> >
>
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