Re: original iMac problems

[Michael <macallan%NetBSD.org@localhost>]

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Hello,

On Jul 5, 2012, at 4:29 PM, John D. Baker wrote:

> On Thu, 5 Jul 2012, Michael wrote:
>
> > Black, garbled, out of sync or something completely different?
>
> In-sync.
> Bottom 3/4:  black.
> Top 1/4: left 1/4: garbled white/grey/(green?) scintilating pixels
> Top 1/2: rigght 3/4: alternately white/grey vertical stripes, solid  
> white
> or solid black.
>
> Similar to what's shown here:
>
>  http://mail-index.netbsd.org/port-macppc/2010/10/02/msg001160.html

Weird, on first glance it looks like the framebuffer is in 24bit mode  
while the rest is in 8 bit. Probably missing some drawing engine  
initialization.

> From my machine's "/var/run/dmesg.boot" when machfb is allowed to  
> attach
> (from a 6.99.8 kernel):
>
>  machfb0 at pci0 dev 18 function 0: ATI Technologies 3D Rage Pro  
> (rev. 0x5c)
>  machfb0: 16 MB aperture at 0x81000000, 4 KB registers at 0x80881000
>  machfb0: 128 KB ROM at 0x00000000
>  max_dotclock according to supported modes: 78750
>  machfb0: 6144 KB SGRAM 98.924 MHz, maximum RAMDAC clock 230 MHz
>  machfb0: initial resolution 1024x768 at 8 bpp
>  wsdisplay0 at machfb0 kbdmux 1: console (default, vt100 emulation)
>  wsmux1: connecting to wsdisplay0
>  direct rendering for machfb0 unsupported
>
> See my thread here:

> > It either picks the wrong mode, fails to set it up properly, or  
> > something completely different. Would be nice to nail down which  
> > one it is first.
>
> I've reported as much data as I've been asked for to try and figure it
> out over the the past 3+ years.  It seem to yet be inconclusive.

What happens if you start X and exit immediately? Does that result in  
a readable console with machfb?
I bet it's something fairly trivial which would be easy to fix if I  
could just reproduce it.

have fun
Michael


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