[Bug 15648] randr doesn't detect my external LCD's preferred resolution

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Apr 23 23:24:10 PDT 2008


--- Comment #1 from Alex Deucher <agd5f at yahoo.com>  2008-04-23 23:24:09 PST ---
The driver is not able to get an edid from the monitor, but it detects the
load, so it comes up with the server default modes since the driver doesn't
know what modes the monitor supports.

you can either add modelines to the monitor section of your config associated
with the VGA port, or add the modelines at runtime using xrandr:

xrandr --newmode "1280x1024R"   90.75  1280 1328 1360 1440  1024 1027 1034 1054
+hsync -vsync
xrandr --newmode "1280x1024"  109.00  1280 1368 1496 1712  1024 1027 1034 1063
-hsync +vsync
xrandr --addmode VGA-0 "1280x1024R"
xrandr --addmode VGA-0 "1280x1024"
xrandr --output VGA-0 --mode 1280x1024
xrandr --output VGA-0 --mode 1280x1024R

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