Macbook 13 retina
Connect three displays via the 2 DisplayPort and 1 HDMI ports
(passive adaptors, so they appear in xrandr as HDMI1, HDMI2, HDMI3)
(order displays from left to right as HDMI2,HDMI1,HDMI3 - I haven't tested other orders)
(monitors are portrait)
Boot Ubuntu 14.04 with laptop lid closed (all 3 external monitors will become active)
Open Screen Display settings
Turn off "Mirror displays"
Click "Detect Displays" or "Launcher placement"
* Problem: displays are identified by name, which is useless if the displays are same make and model (as is common)
(it would be better to use numbers 1,2,3 as Gnome settings does)
Select rotation "Anticlockwise" for each monitor
Try to rearrange displays in GUI
* Problem: HDMI3 "clings" to the (turned off) "Built-in Display". Can't change it with respect to other displays.
- Because of the "clinging" there is a big gap in the GUI between the displays
- There is no problem rearranging HDMI1 & HDMI2 with respect to each other
- But HDMI1 & HDMI2 can't be placed to the right of HDMI3 or the Built-in Display
- HDMI3 can't be placed to right of the Built-In Display
Order as HDMI2, HDMI1, HDMI3 to match physical order
Try to drag a window around the displays
* Problem: Windows can't be placed across the centre and right displays (HDMI1 and HDMI3)
* Problem: Boundary between centre and right displays is very sticky, even though "Sticky edges" is OFF for all displays in Screen Display settings
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity-control-center 14.04.3+14.04.20140410-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Apr 25 00:05:32 2014
InstallationDate: Installed on 2014-03-27 (28 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
SourcePackage: unity-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
usr_lib_unity-control-center:
activity-log-manager 0.9.7-0ubuntu14
deja-dup 30.0-0ubuntu4
The weird thing about this is if I do:
xrandr --output HDMI1 --auto --rotate left --output HDMI2 --auto --rotate left --right-of HDMI1 --output HDMI3 --auto --rotate left --right-of HDMI2
and then go back to the Display Settings, it shows the correct alignment. So the settings program obviously understands the desired final state, but the user has no way to get there (apart from using the command line).