I tried it. unity --reset appears to kinda sorta work and start Unity
3D. However it is unusable, and logging in with it still doesn't work.
The first time I tried it Xinerama was still enabled. This resulted in
three mirrored copies of Unity, one on each monitor (which all acted as
if I clicked on them, any time I clicked on one of them). The desktop
background image was shifted to the right, and the mouse didn't click
where the mouse cursor was displayed, but one screen-width to the right,
which was extremely confusing and unusable.
I then tried again with Xinerama disabled. This time it looked a bit
better. However it only used my middle monitor. The left and right
monitors just displayed a white screen with a menu bar on top
(apparently a Nautilus menu bar) and no way to start programs. Again,
unusable. Also because since the mouse cursor does not stop at the left
edge of the middle screen it is *extremely* hard to get the Unity panel
to pop up.
None of this made any difference to logging in to a Unity 3D session
directly. That still didn't work, only displaying a menu bar (from
Nautilus, presumably) at the top of every monitor with no way to start
programs or even log out.
Man, multi monitor support gets worse with every release of Ubuntu. It
has now gotten to the point where it is unusable on *every* combination
of display driver or session. The only one that works at all (with all
monitors) is GNOME Classic (No Effects), with Xinerama enabled, but even
that doesn't work right. When I try to drag icons on the desktop, the
icons are suddenly transposed a full screen width to the left of the
mouse cursor!
What a terrible mess. Is Ubuntu even tested on multiple monitors at all?
Here is the long list of failures of Ubuntu to allow me to use all the
monitors on my system:
* I have to use the proprietary NVidia driver because the open source driver
does not support multiple cards.
* I have to use Xinerama because otherwise there is no way of combining all
screens into one desktop and be able to drag windows from one screen to
another. (Previous versions did at least work without Xinerama, with each
screen acting as a separate desktop, but that is no longer the case in this
version.)
* When Xinerama is enabled the ONLY session that works somewhat correctly is
GNOME Classic (No Effects). Every other one either will not start at all, or
has horrible bugs with mouse positioning, window placement, unusable second and
third screen, etc.
* And even that doesn't work fully correctly, as described above.
And this is not some exotic or ancient system. It's a modern PC with a 3
GHz quad core Intel processor, 8 GB of RAM and two NVidia Geforce 8800
GTX cards, two monitors on the first card and one on the second.
Something which Ubuntu should comfortably support.
** Changed in: unity (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/894132
Title:
unity does not start after upgrade to oneiric ocelot
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