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SubjectRe: Matroxfb dualhead dies
On 10 Mar 00 at 14:42, David Woodhouse wrote:
> > Thanks, applied. Are you sure that you do not have some wire on the
> > G400, which should not be there? Or what you have connected to
> > secondary monitor output?
> It's fresh out of the box. I haven't added any wires to it myself :)
So I'm sending diff to Linus.
> All that's connected to the secondary monitor output is a _very_ old mono VGA
> monitor.
Maybe it has grounded some previously unused wires in VGA connector, which
are now used for I2C data & clock - but I thought that i2c subsystem
will return error in this case (clock stuck on zero / data stuck on zero).
> Strangely, the picture on the second head is stretched vertically - so I can't
> see the top and bottom of the picture.
Maybe 640x480 videomode constants for secondary head are not completely
correct. I'll recheck them. You can always use fbset after boot.
> When I swap the monitors over, I can see both pictures fine - but the decent
> monitor reports 31.4kHz horizontal frequency for the second head, which isn't
> right is it?
It is almost correct. 31.5kHz horizontal, 60Hz vertical, 640x480, 32bpp...
Best regards,
Petr Vandrovec
vandrove@vc.cvut.cz


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