How can I exclude the X default mode in RandR ?

[GordonYuan at viatech.com.cn]

Alex,
    Thanks!
	Because HDMI doesn't support GTF timing, the X default modes are all excluded on XServer 1.6.
    I still have no idea how to filter them on XServer 1.5.x. I can filter certain mode, but I can't filter all the X default modes. 

Best wishes,
Gordon

-----Original Message-----
From: Alex Deucher [mailto:alexdeucher at gmail.com] 
Sent: 2009年3月23日 21:54
To: Gordon Yuan
Cc: xorg at freedesktop.org
Subject: Re: How can I exclude the X default mode in RandR ?

On 3/23/09, GordonYuan at viatech.com.cn <GordonYuan at viatech.com.cn> wrote:
>
>
>
>
> Dear all,
>
>     In RandR, X will include the default mode (xf86DefaultModes) in the mode
> list. But it’s not useful for some devices (e.g. TV or HDMI). How can I
> delete these modes from the mode list? I don’t want to output these modes if
> I press the command “xrandr -q”.
>
>     It’s X behavior. It seems that driver can’t change the logic.
>
>     Thanks!

xserver 1.6 and newer only add the default modes if the edid has the
continuous frequency bit set.  If you don't want to add certain modes,
you can filter what gets added in your driver's mode_valid() function.

Alex