[mythtv-users] auto frame rate change

[HP-mini]

On Sun, 2015-11-22 at 14:10 +0000, Jason Kitching wrote:
> The driver will just add your custom modelines to the total pool of
> available modes unless you tell it to ignore the others..
> 
> Unless this "VertRefresh     56.0 - 62.0" is being ignored because it
> does not compute with the custom modelines then you're getting 60Hz
> output only.
> You can read thru' /var/log/Xorg.0.log file to find out..
> 
snip..
> Remove (comment out) the interlaced modelines because the video card
> should be better than the TV.
> 
> The remaining 2 modelines are not right, they are just made up for some
> old projector (VGA possibly).
> The ~60Hz one should be using reduced vertical blank timing:
> Modeline "1920x1080R"  138.50  1920 1968 2000 2080  1080 1083 1088 1111
> +hsync -vsync
>   and the 50Hz one:
> Modeline "1920x1080_50.00"  141.50  1920 2032 2232 2544  1080 1083 1088
> 1114 -hsync +vsync
> 
> Blm
> 
> ---------------------
> 
> Followed that Blm, thanks, can see the default change to 60Hz but 24fps
> still being forced so I checked /var/log/Xorg.0.log and found that
> nvidia-auto-select kicks in and sets the res to 1920_1080_24.
> 

> Some mix of these options (in xorg.conf) should prevent the auto-select
> mode:
> 
> Option "ModeValidation" "DFP-1: AllowNonEdidModes, NoXServerModes,
> NoVesaModes, NoEdidModes, NoPredefinedModes"
> 

> Thnks for the help and the link, most helpful. This reply is simply a note to say thanks for your efforts and for info.
> 
> I can now disable 24fps with the Option line of either
> Option "UseEdidFreqs" "boolean"
>      Option "UseEDID" "FALSE"
>      Option "UseEDIDFreqs" "FALSE"
> 
> The screen sets to 60hz but 50hz now no longer works. The /var/log/Xorg.0.log shows no valid modes for 1920x1080_50+0+0 ignoring. If I then disable the option lines the 1920x1080_50 line validates as does the 1920x1080_60 line. Guess there must be a hardware glitch somewhere that prevents it reporting correctly. I've now spent the best part of a week trying to figure it out and tbh it's now not worth the effort. Far simpler just changing from Auto to 60hz in mythtv for when I play 24fps media.
> 

The option UseEDID is a blunt hammer (that I use too), the
ModeValidation seems more of a controlled approach.

This line has to change if EDID frequency info is set to ignored because
it prevents 50Hz modes on that screen.
"VertRefresh     56.0 - 62.0"