On Thu, Nov 14, 2013 at 09:56:52AM -0500, Bastien Nocera wrote:
----- Original Message -----
<snip> > - need for better multi-monitor support
We already have a redesigned Settings panel for external displays in F20. We'd probably need to get more into specifics here (how many monitors, whether they're completely static, where the main monitor is, and whether the problem is usage after the desktop is setup, or really problems in setting up a specific layout).
The problem I have been having is that I have configured Xorg to rotate my four montiors, but that configuration is ignored and/or overridden by GNOME with GDM starts.
I finally figured out the fix:
1. Make sure the Xrandr plugin is enabled:
gsettings set org.gnome.settings-daemon.plugins.xrandr active true
2. Use the Display Settings control panel to set things up the way I want.
3. Manually copy the file ~/.config/monitors.xml to /etc/gnome-settings-daemon/xrandr/monitors.xml
Step #3 was the unexpected and un-user-friendly step. None of this was documented that I could find.
I think I had originally disabled the xrandr plugin in older Fedoras because turning off a monitor caused all hell to break loose--the monitor positioning/rotation was scrambled and in some cases it wouldn't come back correctly at all without restarting the X server (maybe driver bugs here).
So, there are several problems here. First, all the documentation out there that says to use /etc/X11/xorg.conf to configure your multi-monitor setup system-wide doesn't work with Gnome 3 on Fedora 19 in my experience.
Second, there is no discoverable/documented user-friendly way to set the system-wide/GDM monitor configuration.
Third, there may be some bad interactions with the Xrandr plugin in the face of hardware configuration changes or simply powering off/on monitors.