Bug#905363: fails to start on rotated screen

[Simon McVittie]

On Fri, 03 Aug 2018 at 17:09:24 +0200, W. Martin Borgert wrote:
> On a device with rotated screen, gdm3 fails to start
[...]
> I tested the patch on the Debian package and it seems to work
> well on my machine. Please consider applying it. Thanks!

I've uploaded this to experimental, but not unstable yet (sorry, I only
have a test environment for GNOME 3.29 right now). Any GNOME team members
who are still able to test 3.28 are welcome to upload the same change
to unstable.

    smcv