[mythtv-users] modeline for 50Hz

Roo roo.watt at gmail.com
Wed Apr 11 15:26:08 UTC 2007


On 11/04/07, Henrik Beckman <henrik.list at gmail.com> wrote:
>
> How do I get my mythbox to display in 50 instead of 60Hz.
> I have a 32" LCD connected over DVI, xorg follows
>
> All tha happens when I try different modelines are that I get
> 1280x720 at 60Hz intead of 1360x768 at 50Hz
>
> Ideas ?
>
> /Henrik
>
> Section "Monitor"
>     Identifier     "Generic Monitor"
>     ModeLine       "1360x768" 85.5 1360 1424 1536 1792 768 771 777 795
>
>     Option         "DPMS"
> #       HorizSync       28-64
> #       VertRefresh     43-60
> EndSection
>
> Section "Device"
>     Identifier     "6150"
>     Driver         "nvidia"
> EndSection
>
> Section "Screen"
>    #Option         "UseEdidFreqs" "FALSE"
>     Identifier     "Default Screen"
>     Device         "6150"
>     Monitor        "Generic Monitor"
>     DefaultDepth    24
>     Option         "ModeValidation" "NoMaxPClkCheck"
>     Option         "ExactModeTimingsDVI" "TRUE"
>     Option         "AllowDDCCI" "TRUE"
>     #Option         "UseEDID" "FALSE"
>     SubSection     "Display"
>         Depth       24
>         Modes      "1360x768"
>     EndSubSection
>     SubSection     "Display"
>         Depth       32
>         Modes      "1360x768"
>     EndSubSection
> EndSection
>
>
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>
>
 Try adding:

 Option  "ModeValidation"        "DFP-0: AllowNon60HzDFPModes"

to your Xorg with the rest of the screen options, I found I needed this to
allow non 60Hz modes. I think the doco said it was to protect some dodgy
panels that would freak out on non 60 Hz stuff.


Cheers,

Roo.
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