[intel, xrandr] enforcing resolution on startup, PreferredMode anomaly

[Dag Bakke]

Executive summary:
all is well, but Xorg.0.log claims that option "PreferredMode" isn't
used, even though it appears to be.


For the benefit of others in a similar type of floating vehicle:

I have a slightly broken BIOS (AOpen i915GMx-F, claims LVDS is
connected) and a TV lying about its capabilities, which together require
the following xorg.conf:

Section "Device"
        Identifier "Card0"
        Driver "intel"
        Option "monitor-LVDS" "LVDS"
        Option "monitor-TMDS-1" "DVI"
EndSection

Section "Monitor"
        Identifier "LVDS"
        Option "disable" "true"
EndSection

Section "Monitor"
        Identifier "DVI"
        Modeline "1366x768R"   72.25  1366 1416 1448 1528  768 771 781
790 +hsync -vsync
        Option          "PreferredMode" "1366x768R"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "DVI"
        DefaultDepth    24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes "1366x768R"
        EndSubSection
EndSection


With this xorg.conf, the (lightly edited) log claims:
 (II) intel(0): Output VGA using monitor section DVI
 (**) intel(0): Option "PreferredMode" "1366x768R"
 (II) intel(0): I2C bus "CRTDDC_A" initialized.
 (II) intel(0): Output LVDS using monitor section LVDS
 (**) intel(0): Option "Disable" "true"
 (II) intel(0): Output LVDS disabled by config file
 (II) intel(0): Output TMDS-1 connected
 (II) intel(0): Output TMDS-1 using initial mode 1366x768R
 (WW) intel(0): Option "PreferredMode" is not used

xrandr says:
   1366x768R      59.9*+

so all is well. Apart from the WW above.


Axing the
         Option          "PreferredMode" "1366x768R"
line from the xorg.conf, I get:

 (II) intel(0): Output VGA using monitor section DVI
 (II) intel(0): I2C bus "CRTDDC_A" initialized.
 (II) intel(0): Output LVDS using monitor section LVDS
 (**) intel(0): Option "Disable" "true"
 (II) intel(0): Output LVDS disabled by config file
 (II) intel(0): Output TMDS-1 connected
 (II) intel(0): Output TMDS-1 using initial mode 1280x720

and xrandr says:
   1280x720       60.0*+

which doesn't match the physical resolution of my LCD TV.



Thanks,

Dag B.