On 10/08/11 12:00, James Morrissey wrote:
Hi all,
I posted this on the forums yesterday, but haven't had much luck. I
was wondering if anyone here could help.
I am trying to set up dual monitors in Ubuntu, with the two monitors
having different resolutions. One monitor is on my laptop and the
other is an external monitor. I have an ATI Radeon express 200m doing
the graphics.
That probably means you have to use the ATI open source driver IIRC.
For the two monitors i would like to have one showing at
1280x800 and the other at 1280x1024. At the moment the resolution has
defaulted to 1024x768.
Do you know if the spec of your Radeon 200m supports these resolutions
combined? I would guess it does, but I'm not sure without googling it.
Do you know if it uses its own memory or shares system memory, and if
so, how much?
I have seen a number of threads detailing this problem, but none seem
to solve my issue. Here is a run down of how far i have gotten on
different fronts.
1. Talks about editing xorg.conf.
- The problem here is that i don't seem to have an xorg.conf file in
/usr/share/X11. When I "locate xorg.conf" in the terminal i get:
/usr/share/X11/xorg.conf.d
/usr/share/X11/xorg.conf.d/10-evdev.conf
/usr/share/X11/xorg.conf.d/11-evdev-quirks.conf
/usr/share/X11/xorg.conf.d/50-synaptics.conf
/usr/share/X11/xorg.conf.d/50-vmmouse.conf
/usr/share/X11/xorg.conf.d/50-wacom.conf
/usr/share/X11/xorg.conf.d/51-synaptics-quirks.conf
/usr/share/doc/xserver-xorg-video-nouveau/examples/xorg.conf
/usr/share/man/man5/xorg.conf.5.gz
>
As such i am not sure which file to try and edit.
Leave those alone for now.
2. Try changing resolution on one of the monitors in
~/.config/monitors.xml, which is where i got the unity dock to only
show on the primary monitor.
- Here, after i saved the changes to ~/.config/monitors.xml, and
logged out, i got an error message saying that the resolution would
not work as i logged in.
What was the exact error message you got?
Can you post the monitors.conf you have at the moment?
Both monitors then came up as they were
initially. When i looked at ~/.config/monitors.xml, i saw that the
resolutions had reverted back to what they were originally.
3. Talks about editing xrandr, linking to this page
http://www.ubuntugeek.com/how-change...ng-xrandr.html
- This looks incredibly intimidating and i can't really work out what
to do in my case. Any advice would be much appreciated.
xrandr isn't as complicated as the documentation makes it look. If you
want more advice on this option you will need to state which version of
Ubuntu you are using though, as it has changed a bit over the last few
years.
4. I think is a GUI method for the solution offered by 3 (above). This
involves trying to 'configure display settings' in 'monitor
preferences'. Here i can change the resolution of each monitor quite
easily. This works and the resolution is perfect. The problem though
is once i have set the resolution to what i want for both monitors,
they begin to behave strangely. Most notable is that when i close
things they don't disappear off the screen (although they appear to
have closed), the unity dock smears on the screen when it minimizes
and mouse pointer labels show up and then don't disappear.
I think you would need to create an xorg.conf to use this method, as it
would need the total X screen area defined in order to work.
So i am now stumped. If anyone can tell me either how to sort the
resolution, interpret the xrandr instructions or fix the screen
smearing i would be very grateful.
I'm up for having a go at bouncing a few ideas around. I think your
option 4 is probably the one to start with, although I think it will
involve a certain amount of overlap with option one. I've used xrandr,
and it might be useful, but option 4 would be needed too as xrandr will
not help you have two monitors showing different parts of the same
desktop (which is what you will have to do if you want different
resolutions on each screen - if you want cloned screens, you need the
same resolution on each).
First I need to know what version of Ubuntu you are running, as there
are differences between them, and I like to post stuff which I can test
in the same environment before I post it. Then we can start constructing
a suitable xorg.conf. You also need to decide which of the two windows
is going to have the (I assume) Gnome menus on it.
--
JimP
--
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