On 02/09/2012 02:30 PM, Aaron Konstam wrote:
<snip>
If you don't see your 1920x1080 in there, then you can forcing it by
trying "xrandr --mode 1920x1080" to see if that'll bite. If it does,
then you can add appropriate lines to your xorg.conf file.
tried what yoou suggest. Although man xrandr says there is a --mode
option when I run xrandr --mode I get a response that the option does
not exist. Why is that?
Ah, yes. Try "xrandr --fb 1920x1080". I think "--mode" was for a
previous version of xrandr. Did just "xrandr" show the ability to do
1920x1080? I'm trying to see if your monitor or cable just isn't
reporting the EDID info properly.
I am not the original poster but I was just trying this method to
configure my screen. In my case 1280x1024. When I ran:
xrandr --fb 1289x1024
I got the error message:
xrandr: Failed to get the size of gamma for output default.
What does that mean?
I've been playing with this. First off, do "xrandr" all by itself to
find out what your outputs are called. In my case, here's what I see:
[root@prophead ~]# xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
DVI-I-1 connected 1920x1080+0+0 (normal left inverted right x axis y
axis) 598mm x 336mm
1920x1080 60.0*+ 60.0
1600x1200 60.0
1680x1050 60.0
1280x1024 75.0 60.0
1440x900 59.9
1280x960 60.0
1152x864 75.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 72.8 75.0 66.7 60.0
720x400 70.1
DVI-I-2 disconnected (normal left inverted right x axis y axis)
So, I actually have two outputs, one called "DVI-I-1" (which is the
active one and is currently in 1920x1080 mode) and "DVI-I-2" (which
isn't hooked up to a monitor right now). My active monitor can handle
all the modes listed below it. To change to 1600x1200 mode:
xrandr --output DVI-I-1 --mode 1600x1200
I just did this on my laptop (F16) to prove the concept and it did
work. The missing gamma thing is because you didn't specify an output,
and the "--mode" does work, but only when "--output" is also specified.
I should read the man pages more thoroughly myself. Sorry if I
confused anyone. You may now hurl angry birds at me if you wish.
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- Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx -
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- Microsoft Windows: Proof that P.T. Barnum was right -
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