Today I was trying to connect my second monitor to my notebook. I have:
- nvidia graphic card
- 304.43 drivers [support xrandr 1.2]
- archlinux [up-to-date]
- awesome wm
- xrandr 1.3
My problem is with bigger resolution than 640×480 for my external monitor (VGA).
xrandr -q:
Screen 0: minimum 8 x 8, current 1920 x 800, maximum 8192 x 8192
VGA-0 connected 640x480+1280+0 (normal left inverted right x axis y axis) 0mm
640x480 59.9*+
320x240 120.1
LVDS-0 connected 1280x800+0+0 (normal left inverted right x axis y axis) 331m
1280x800 59.9*+
HDMI-0 disconnected (normal left inverted right x axis y axis)
As we can see the is no higher resolution fo VGA, so I add new mode:
xrandr --newmode $(gtf 1280 1024 70.4 | grep Modeline | sed s/Modeline\ // | tr -d '"')
I checked avaible resolution and refresh rate under windows: one of them was 1024x768x70 (OSD of my monitor said that it is 70.4HZ). After create new mode, I wanted to add it:
xrandr --addmode VGA-0 1280x1024_70.40
And… It failed:
X Error of failed request: BadMatch (invalid parameter attributes)
Major opcode of failed request: 153 (RANDR)
Minor opcode of failed request: 18 (RRAddOutputMode)
Serial number of failed request: 29
Current serial number in output stream: 30
From google I learned that in older xrandr / nvidia drivers was problem with list of avaible modes, but now with support of xrandr 1.2 by nvidia drivers it should be better. I also try with lower resolution and refresh rate (eg. 1024x768x50), but I've got the same error.
I'm out of ideas what to do with this problem…
Best Answer
I am not sure if you have created the string following
xrandr --newmode
by yourself or have you copied it from somewhere else, but it won't work in its current form.I recommend to do it step by step.
First, you need to generate the new mode. I recommend using 60Hz with LCD or 85Hz with CRT monitor
You will get something like:
Then present this mode to
xrandr
using--newmode
(copy-paste the line starting with 'Modeline'.Then add this mode to VGA-0:
And finally you can use this new mode: