Public bug reported:
Binary package hint: linux-source-2.6.22
Hardware: 13"Macbook, integrated Intel 950 GMA graphics
OS: ubuntu 7.10 full release
Xorg: 1:7.2-5ubuntu13(gutsy)
Xrandr: 1:1.2.2-0ubuntu1
uname -a: Linux macbook 2.6.22-14-generic #1 SMP Sun Oct 14 23:05:12 GMT 2007
i686 GNU/Linux
xorg.conf: Driver "intel"
915resolution package not installed
When I connect my external 1920x1200 widescreen monitor through the DVI adapter
to the Macbook:
a) Ubuntu's "Screens and Graphics" GUI confiog tool doesn't recognize the dual
screen situation.
I can make the tool detect the correct external monitor model but it won't list
the 1920x1200 nor the 1280x800 resolutions as options
and certainly won't let me configure 2 screens for dual display (side-by-side
e.g.)
The tool even messes up the setup for the built-in laptop screen and cannot
restore previously working configurations.
When I selected "generic" LCD panel1280x800 for the built-in screen of my
Macbook, the native resolution of 1280x800 is not detected.
Switching back to the original "plug 'n play" model, same problem, the native
resolution of 1280x800 is not detected and cannot restore the original
settings anymore.
Once I quit this tool, my /etc/X11/xorg.conf file is full of modelines.
The tool seems to overwrite the xorg.conf file so I can only restore my laptop
screen by dumping that file, using the orginal backup version and never touch
the "Screens and Graphics" tool.
b) running xrandr manually, the 1920x1200 mode appears as an option for
--output TMDS-1, ie the external monitor, at first. But when I actually try
to enable it, the external screen gets all messed up and after a few seconds I
see a message that the monitor doesn't support the signal. This used to work up
until ~July/August'07 with xrandr 1.2.0 and an earlier version of X under
FeistyFawn.
Now only the lower resolution 1280x800 works on the external screen and allows
me to place it --left-of LVDS.
I had hoped that the dual screen situation was sorted by now. Maybe it's
just a Mac issue but I was hoping I could show how ready Ubuntu on a
laptop is for corporate use. Everyone at work is running around with
laptops, plugging in+out of presentation projectors, video conference
systems and desk monitors, back to laptop-only use, lids closed+reopened
for suspend/sleep inbetween about 100x a day.
Can we raise this issue I reported here to at least 'medium'?
** Affects: linux-source-2.6.22 (Ubuntu)
Importance: Undecided
Status: New
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xrandr (or X) can't drive 2nd screen at 1920x1200 anymore
https://bugs.launchpad.net/bugs/154859
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