On Tuesday, August 16, 2011 12:02:31 AM Przemek Klosowski did opine:
> On Mon, Aug 15, 2011 at 6:06 PM, gene heskett <ghesk...@wdtv.com> wrote:
> > On Monday, August 15, 2011 05:15:23 PM Przemek Klosowski did opine:
> >> Section "Monitor"
> >> Modeline "1360x768" 85.5 1360 1424 1536 1792 768 771 777 795
> >> EndSection
> >
> > Many thanks, I just added that to the top of an extensive list in that
> > machines xorg.conf, and I will go reboot it now for effects.
> >
> > I tried variations of 1360x768 and 1366x768. The log contains a long
> > list of available modes, which do not include either of those, and
> > are uniformly within a pixel of a 4x3 aspect ratio. Does that list
> > of modes come from the card? Or from the vesa driver?
>
> It's possible that your xorg.conf is messing you up---I bet you it's a
> remnant of the old setup, and quite possibly not necessary. The long
> list of modelines was how I learned to do X11 back in the days when we
> had to whittle ones and zeros out of oak timbers but nowadays,
> xorg.conf is just few lines long, and the Xorg server finds out the
> video hardware, reads the monitor parameters over the video cable and
> matches it to the built-in list of VESA standard modes. It'd be
> interesting to try with a virgin minimalistic xorg.conf
>
> Section "Device"
> Identifier "Videocard0"
> EndSection
>
> Section "Screen"
> Identifier "Screen0"
> Device "Videocard0"
> DefaultDepth 24
> EndSection
>
> and maybe it'll figure something out on its own. I don't know if
> 1360x768 is on the VESA list so maybe you do need it after all.
>
> > The log says 136nx768 is not used because there is no mode of that
> > name even though I have added it to the "Monitor" section.
>
> It has to match the "Monitor" section your Screen section is using;
> there could be multiple Monitor sections
> ("Monitor1","myOldCRT","LCDmonitor2", etc). Say something like
>
> Section "Screen"
> Identifier "Screen0"
> Device "Videocard0"
> Monitor "MyMonitor"
> ...
> Section "Monitor"
> Identifier "MyMonitor"
> Modeline .....
> ...
>
> > If its the card, I wonder if it is flashable to add that mode?
>
> Nope, I doubt it, every VGA card is capable of any resolution from
> like 320x320 (?) to 8000x8000 (???) within the memory capabilities and
> video clock speed; the limitations come from the monitor and driver
> limitations.
>
> > Or should I shelve the card, an ATI X1650 and replace it with
> > something else that knows about 16x9 aspect ratios?
>
> I will bet you a beer that your card is capable of driving your
> monitor resolution.
>
According to Alex D. at xorg, no. If the mode is not available in the vesa
bios, and it isn't, every mode available is a 4x3 variant, so no twiddling
with modelines will help.
The problem is that the vesa specs were carved in nice hard stone back in
crt days, so all these widescreen monitors have never worked their way into
the vesa bios, and likely never will. The card of course is capable of the
mode, but only when running the fglrx drivers. The last time I tried that,
I couldn't nuke it fast enough, the backplot was running 3-5 seconds behind
the machine and I had to slow the base period to about a 3rd of what its
doing now to stop the stalls. Even then the motors were making very rough
tones.
So, until I can find a 4x3 LCD monitor of about 19", I guess I run with 2"
of blank screen on both sides, which gives me about a 14" equ monitor out
of a 18.5". Fortunately, the monitor has a mode button that switches that
in about 1/2 second.
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Cheers, gene
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