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[Launchpad Bug Tracker <1058388@xxxxxxxxxxxxxxxxxx>]

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I just installed 12.10 beta 2, and updated all the packages. I was
hoping that multi-monitor support will get better, but I was in for a
big surprise: not that it isn't better, it's worse than it was in 12.04.

I have a i5 machine with 8GB ram, AMD 7950 graphic card, an Dell 24"
monitor and Acer projector. After the installation on HD (I used open
source driver), my system was configured in mirror mode, with 1024x768
resolution (Screen01; 1400x1050 was just chosen, not applied, it was
changed to 1024x768 before turning off mirror mode). In 12.04, because I
was unable to mirror monitor's 1920x1200 to projector's 1024x768, I was
keeping them in side-by-side configuration. So, my first impulse was to
turn off the mirror mode (Screen02, screenshot of Expo view on
Screen03). After clicking on Apply, I got all my windows dissapeared
(Screen04, photograph). As it turned out, all my windows were moved to
second screen (projector, which was just plugged in, but not turned on),
which can be seen on screenshot Screen05. Expo view also gave me nothing
(Screen06, photograph), but screenshot of Expo view shows that there are
windows (Screen07) - why is this different???

On my next attempt, I turned off Mirror mode AND turned off the
projector at the same time, and was finally able to see all windows on
the monitor. After that, I changed monitor's resolution to 1920x1200 and
I tried to turn mirror mode on, and got completly screwed-up desktop
(Screen07). I tried to expand shrinked windows and got something like
Screen08. Because it was impossible to recover desktop, I logged out and
logged back in, and launcher was gone (Screen10). After several failed
attempts to bring it back, I logged out, deleted all settings from home
folder (.config, .compiz, .gconf), logged back in and launcher was back.

Additionally, on Display settings, if I click on projector icon (Acer),
and then on monitor icon (Dell), I cannot click again on Projector - it
just isn't active anymore. By accident, I discovered that area ABOVE the
projector icon was active (Screen11, there is no cursor on screenshot,
but you can see the tooltip just above from where it is).

My next test was to see if windows are on their places when projector
display is turned on and off. Screen12 shows initial window
configuration, with projector turned off. After turning projector on
(Display settings), the windows were moved, just like in 12.04
(Screen13). Additionally, terminal and text editor were maximized (they
weren't before). I then aranged windows to where they should be
(Screen14), turned projector off, and they were moved again (Screen15).
Notice that terminal and text editor windows are split between two
workspaces, but one half of text editor window isn't visible. After
clicking on it, the other half became visible (Screen16).

Additionally, whenever I turn projector on or off, the mouse is moved on
some seemingly random location.

There is more, but this is what I experienced in the first half hour of
trying 12.10 beta 2. All pictures are in attached archive.

If someone needs me to do additional tests, I'll gladly do, because
12.10 in this state just isn't usable for me.

** Affects: compiz (Ubuntu)
     Importance: Low
         Status: Confirmed

-- 
Ubuntu 12.10 multi-monitor support is having issues
https://bugs.launchpad.net/bugs/1058388
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