[Techtalk] resolution woes

[Robyn Willison]

Hi

There's a utility now that generates modelines so you can put them in
your xorg.conf A modeline is like an exact setting.

gtf 1280 1024 60

gives a modeline for 1280x1024 @ 60Hz if you need higher refresh rate
(70 or 75 recommended for crt monitor) change the 60.

In your xorg.conf there is a section for monitor settings this is mine
but you put the modeline in here

Section "Monitor"
    # HorizSync source: edid, VertRefresh source: edid
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "LG L196WTP"
    HorizSync       30.0 - 83.0
    VertRefresh     56.0 - 75.0
    Option         "DPMS"

# 1280x1024 @ 60.00 Hz (GTF) hsync: 63.60 kHz; pclk: 108.88 MHz
    Modeline "1280x1024_60.00"  108.88  1280 1360 1496 1712  1024 1025
1028 1060  -HSync +Vsync
EndSection


In the SubSection "Display" below you reference the above modeline you
have to put the whole part that in "" ie "1280x1024_60.00"


Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    SubSection     "Display"
        Depth       24
        Mode	   "1280x1024_60.00"
    EndSubSection
EndSection

Putting settings like this in xorg.conf tells xorg to use specific
resolutions in the specific way defined in the modeline. You can have
multiple modelines referring to each in the SubSection "Display"

Mode	"1280x1024_60.00" "1024x768_60.00" "800x600_60.00"

hth

Robyn

On Tue, 2009-01-13 at 18:23 -0800, maria at shadlen.org wrote:
> hello there,
> 
> I am trying to fix my resolution, which seems to be currently set too
> high. I am using debian lenny, so dpkg-reconfigure xserver-xorg seems to
> do nothing for screen resolution. I tried to use xrandr, which is what
> seemed to be the right thing to do according to my google search, but ran
> into this:
> 
> sarah:~# xrandr -s "1280x1024"
> Size 1280x1024 not found in available modes
> sarah:~# xrandr
> Screen 0: minimum 320 x 200, current 1600 x 1200, maximum 1600 x 1200
> default connected
>    1600x1200       0.0
>    1280x1024      76.0
>    1024x768       76.0
>    800x600        73.0
>    640x480        73.0
>    640x400         0.0
>    320x400         0.0
>    320x240         0.0
>    320x200         0.0
> 
> Obviously, it should have found it, and I'm not sure what I've done wrong.
> Any ideas would be greatly appreciated. Btw, if I log into x and try to
> configure from screen resolution preferences, I get no resolutions in the
> drop down menu.
> 
> thanks,
> maria
> 
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