On Wed, Dec 16, 2015, 10:05 PM Chris Murphy <lists@colorremedies.com> wrote:
On Wed, Dec 16, 2015 at 5:06 PM, Adam Williamson
<adamwill@fedoraproject.org> wrote:
> On Wed, 2015-12-16 at 16:16 -0700, Chris Murphy wrote:
>> Hmmm well if the display isn't fakaked, which is actually surprisingly
>> infrequent (i.e. it is fakaked), via EDID it should inform the OS (if
>> it asks) what the orientation is so the OS can just do the right
>> thing. I have a display in a box about 20 feet away that does the
>> right thing. Maybe....hmmm....MAYbE I should get it outta the box? And
>> I don't know, test it? Egads. I know it works on X, but ONLY with the
>> discrete GPU. Integrated GPU, no go.
> These are desktop displays. They don't know which way up they are, they
> can't tell the OS.

Yeah I'm talking about desktop displays that pivot, either landscape
or portrait. Any display, pivoting or fixed, is supposed to be able to
communicate it's h and v resolution and hence orientation. As far as I
know, the fixed ones all communicate this correctly. The pivoting ones
don't always do that, or it could be a graphics card or driver or
window server miscommunication.

I'm not sure if it communicates via EDID or DDCI, but it definitely communicates it via either a DVI, mDP or adapter  connection because all I do on OS X is pivot this display the way I want and the OS changes the signal it sends. There's no UI for this on OS X either. So the lack of UI in GNOME doesn't tell me if it'll work out bit with Wayland.

Chris Murphy