Public bug reported:
Binary package hint: unity
Upgraded to natty for testing and filing bugs.
Unity Desktop does not seem to handle dual / multiscreen settings like
gnome did. With Gnome the Xinerama information is used and the second
monitor is used as an extended monitor. panels are not spread over both
screens. Not so with unity where the top panel spreads over both
monitors. This is with nvidia-current - haven't tried with different
driver. This is not desirable as having ubuntu menu and log off button
around 5000px away from each other sucks IMHO ;-)
System has a nvidia gtx 460 with two 30" screens attached.
Nvidia driver is special here, it does use TwinView and emulales xinerama
settings
Anyway problem does not exist with maximizing windows. They do only
maximize on the one monitor, not over both so I supposed the
xineramainfo config is in fact read...
Relevant Config Part is present:
Option "TwinViewXineramaInfoOrder" "DFP-0"
see also on bottom
Haven't found any design guide that would cover how unity is supposed to
handle multi-screen systems, so this bug should also serve as a start
for thoughts an this topic.
There are basically a few scenarios that I can think of:
- Laptop + Projector (clone or extended? I prefer extended to be able to have
my notes on my main laptop screen. leaving the problem of seeing the slides as
well to the presentation application. Wtih extended desktops showing
applications (i.e. terminals is a a pain in the a** - i agree - maybe some
compiz hack can mirror single applications to extended screens? till then vnc?)
- Laptop + screen (usually extends the desktop - user should be able to
choose where to have panels and menu through primary screen... should
work with open source drivers out of the box - nvidia -> problem)
- Desktop with 2 or more screens (Probably it would be best to have it
like before in gnome and macosx which however means that the global menu
is always an the main screen and may be far away. Otherwise one could
think of having unity on all screens (top panel) to hold the menubar
individually for each screen. But extended screens should not have the
indicators and probably not the task switcher (or should it?).
There is still potential for the ui designers and usability guys to
figure this out IMHO :)
Hopefully have addressed this right. Thanks in advance for looking into
this.
Here my relevant xorg snippet.
/etc/X11/xorg.conf:
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Samsung SyncMaster"
HorizSync 49.3 - 98.5
VertRefresh 60.0
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Apple Cinema HD"
HorizSync 49.3 - 98.5
VertRefresh 60.0
Option "DPMS"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
Option "TwinView" "1"
Option "TwinViewXineramaInfoOrder" "DFP-0"
Option "metamodes" "DFP-0: nvidia-auto-select +0+0, DFP-2:
nvidia-auto-select +2560+0"
DefaultDepth 24
SubSection "Display"
Depth 24
EndSubSection
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "TwinView" "0"
Option "metamodes" "DFP-2: nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection
One more side note: Could someone push nvidia to support xrandr so we
can use the normal display settings instead of having to configure
manual xorg.conf with nvidia-settings (which bugs you most of the time
by having to restart X) ? ...
** Affects: unity (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/706811
Title:
unity dualscreen handling
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