[mythtv-users] Ahh - Evil xorg and modelines

Damian Surr damian at gingermagic.co.uk
Tue Jun 12 09:06:13 UTC 2007


Steve Smith wrote:
>
> Damian,
>
>
> I did a bit of reading. Maybe if you were to go right back to basics 
> and see what the NVIDIA can do on its own:
> 1) Get rid of the modelines.
> 2) Try specifying the resolution as "1024x768_60" in the "Modes" line. 
> The EDID suggests the monitor will support this.
> 3) Don't put any of those "NoEDID" options etc in there, let's just 
> see if the NVIDIA can sort it out itself!
> 4) Don't specify the horizontal and vertical frequency limits either 
> just see what the EDID gives us...
>
> Do the startx --logverbose 5 thing and see what happens....
>
>
> OR Did you see this....
>
> "It's starting to point somewhere...
>
> These types of lines:
>
> WW) NVIDIA(0): Unable to use mode "800x600" for DFP-0; cannot compute
> backend
> (WW) NVIDIA(0):     DFP timings (mode is larger than native backend 640 x
> (WW) NVIDIA(0):     480).
>
> Mean it's decided to have a screen size of 640x480 so therefore it's 
> thrown everything out that's bigger than this.
>
> Try adding:
>     Virtual 2000 2000
> Under your "Modes" line, this sets the size of the desktop to 2000 by 
> 2000 (far too big) which you then scroll around.
>
>
> We're also getting:
> (--) NVIDIA(0): DFP-0: DFP modes are limited to 60 Hz refresh rate
>
> So maybe we need:
>    Option "ModeValidation" "AllowNon60HzDFPModes"
>    Option "ModeValidation" "NoDFPNativeResolutionCheck"
>
> Instead of putting those options in one line? (Unless you've already 
> tried it)
>
> Also try putting those Option lines (the Modevalidation NoEDID etc) in 
> the "Device" section, see what happens then.
>
> The grey background is normal for "startx" that's basically just a 
> blank desktop screen with no window manager no nothing, but we're only 
> debugging so we're actually more interested in the log file!
>
> Trying these things out and then post us your configs and Xorg.0.log file.
>
> Cheers
> "
>
>
> On 12/06/07, *Alan Calvert * <cal at graggrag.com 
> <mailto:cal at graggrag.com>> wrote:
>
>     Damian Surr wrote:
>     > Hello all,
>     >
>     > Have I done something so stupid that it's not worth responding
>     to or are
>     > we running out of things to try?
>
>     Yes to both perhaps. If you go back to the start of this thread,
>     and read
>     _carefully_ through the responses you've already received, I think
>     you'll
>     find you've already been given all the advice you need to solve
>     your problem.
>
>     You seem obsessed with achieving 1024x768 (with great
>     difficulty!), yet from
>     your logs I suspect you'd get 800x600 happening ever so easily.
>     Perhaps
>     consider lowering your goals to 800x600 and letting it quietly
>     "just work".
>
>     > I've already wasted for more time than should have  on it.
>
>     and you're not alone in that. Good luck.
>
Great, thanks for that Steve!!

I'll try all that when I get back to the machine in a couple of days.

Damian



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