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John5788
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PostPosted: Fri Jan 30, 2015 5:31 am    Post subject: 16:9 resolutions are missing Reply with quote

I have a laptop that uses 16:9 resolutions and the native resolution is 3200x1800. However, this resolution is too high for me on a 14" laptop display. I would like to change to 1920x1080, but this is not available to me.

Code:

$ xrandr
Screen 0: minimum 320 x 200, current 3200 x 1800, maximum 32767 x 32767
eDP1 connected 3200x1800+0+0 (normal left inverted right x axis y axis) 310mm x 174mm
   3200x1800      60.0*+   48.0     40.0 
   2048x1536      60.0 
   1920x1440      60.0 
   1856x1392      60.0 
   1792x1344      60.0 
   1600x1200      60.0 
   1400x1050      60.0 
   1280x1024      60.0 
   1280x960       60.0 
   1024x768       60.0 
   800x600        60.3     56.2 
   640x480        59.9 
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)


It is also not available to me in XFCE's display manager. What do I need to add to xorg in order to make this resolution available?
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Roman_Gruber
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PostPosted: Fri Jan 30, 2015 7:39 pm    Post subject: Reply with quote

https://wiki.archlinux.org/index.php/xorg


Quote:
Section "Monitor"
Identifier "Monitor0"
EndSection

Section "Device"
Identifier "Device0"
Driver "vesa" #Choose the driver used for this monitor
EndSection

Section "Screen"
Identifier "Screen0" #Collapse Monitor and Device section to Screen section
Device "Device0"
Monitor "Monitor0"
DefaultDepth 16 #Choose the depth (16||24)
SubSection "Display"
Depth 16
Modes "1024x768_75.00" #Choose the resolution
EndSubSection
EndSection


I assume only half of your resolution will work =>
3200 x 1800 ==>>> 1600x900

For the others I am not sure. It used to be the modes setting in xorg server to set resolution, like the example above

i think e.g.g nvidia-settings tool should be able to set the resolution assuming you have nvidia.
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NeddySeagoon
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PostPosted: Fri Jan 30, 2015 10:06 pm    Post subject: Reply with quote

John5788,

You need a modeline then to call up the modeline.
If you use the nVidia binary blob, you will also need an option or two to prevent it from ignoring the modle line.
See the README in /usr/share/docs/...

However, your system may not rescale you mode to full screen.
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