RE: [Dri-devel] Radeon driver, DDCMode

[Hui Yu <hy...@at...>]

> -----Original Message-----
> From: Jon Smirl [mailto:jon...@ya...]
> Sent: Wednesday, November 26, 2003 4:08 PM
> To: Hui Yu; 'Alex Deucher'
> Cc: dri-devel
> Subject: RE: [Dri-devel] Radeon driver, DDCMode
> 
> 
> --- Hui Yu <hy...@at...> wrote:
> > The panel is probably in analog mode so it's treated as a 
> traditional CRT (I
> > haven't found a reliable way to tell an analog panel from a 
> CRT that works
> > with all versions of EDID). Usually analog panels comply 
> well with VESA
> > standard, the traditional way should work fine. DDC_MODE 
> option is only
> > introduced to cope with some exceptions. For CRTs and 
> Analog panels, there
> > are still a lot of people out there prefer to using 
> Modeline to customize
> > their timings, that's why I didn't take DDC_MODE thing too 
> far. In addition,
> > some monitors do lie on their EDID, using VESA standard is 
> probably safer.
> 
> It is a LCD running in analog mode on a VGA cable and the 
> panel does work in the
> Vesa modes. I just thought that since the panel was telling 
> us it's optimal mode
> line, that XFree86 should default to using it. My display 
> does look better using
> the optimal mode line than the VESA one.
> 
> I just think the default should be TRUE and then people with 
> broken EDID or
> custom modelines should turn it off.

Well, you can do this if you don't mind getting a lot of complains like "I
updated to version xxx, radeon driver doesn't use the Modeline I specified
anymore". Of course, you can get around this is by checking
pScrn->monitor->Modes->type, see whether a modeline is specified before
forcing to ddcmode (but you have to check for each mode, probably too much
hassle).

Hui
 
 
> =====
> Jon Smirl
> jon...@ya...
> 
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