On Fri 06 Jan 2012 at 18:37:01 +0000, Andrew Wood wrote:
> OK, in an ideal world though shouldnt the board 'announce' that it
> supports that mode when probed?
I think X can only work with what it is given. If the monitor fails for
some reason to impart information X's idea of what is possible is bound
to be incomplete. xrandr will display what it thinks it can do based on
what it knows, so, as has been pointed out, if it is lacking in knowledge
of what is possible you will have to tell it.
I'll not bore you with why it happens but the EDID data are not passed to
X on a couple of my machines, My xorg.conf is usually non-existent but
in this case I have:
Section "Monitor"
Identifier "1905FP"
Modeline "1280x1024" 109.00 1280 1368 1496 1712 1024 1027 1034 1063
-hsync +vsync
HorizSync 30-81
VertRefresh 56-76
EndSection
Section "Screen"
Identifier "Default Screen"
Monitor "1905FP"
DefaultDepth 16
SubSection "Display"
Depth 16
Modes "1280x1024"
EndSubSection
EndSection
Modeline is computed using 'cvt 1280 1024'.
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