How to set mode to 1080p24 for HDTV

[Alex Deucher]

On Mon, Oct 31, 2011 at 4:23 PM, Andy Furniss <andyqos at ukfsn.org> wrote:
> Frederik Vogelsang wrote:
>>
>> 2011/10/31 Andy Furniss<andyqos at ukfsn.org>:
>>>
>>> Look in Xorg.0.log the modes may be listed.
>>
>> Nope. Only when using fglrx the modes are listed, with the free radeon
>> driver they are not. I never thought a mature video driver like
>> "radeon" would ignore the CEA EDID.
>
> Looking again it's actually DDC that is printing my modes not EDID which
> doesn't list 24p (though it lists a couple which still don't show with
> xrandr)
>

DDC is the channel by which the EDID is fetched.  The xorg log should
print the raw edid.  You can use edid-decode
(http://cgit.freedesktop.org/xorg/app/edid-decode/) to parse the edid
and see what's in it.  If edid-decode lists modes that are not
available in kms, it's due to kms not parsing the extension blocks yet
or it's not parsing them correctly.

Alex

>
>>> If you can see the mode then just add it with xrandr, my tv is DVI-0 so I
>>> use -
>>
>> OK, thanks. I have now set a custom modeline in my xorg.conf.d directory:
>>
>>> Modeline    "1920x1080" 74.25   1920 2558 2602 2750 1080 1084 1089 1125
>>> +hsync +vsync
>>
>> With this manual configuration HD movies run smoothly.
>
> Cool - if you ever hit problems, which I have with xv + mplayer when refresh
> rate = fps try using mplayer -vo gl:yuv=2 -framedrop.
>
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