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Re: sx164 with mga2 probs, noaccel required?

On Sun, Jul 21, 2002 at 11:57:16AM -0700, Gregory P. Smith wrote:
> > "Gregory P. Smith" <greg@electricrain.com> writes:
> > 
> > Hmm, weird, I have very similar effects with a Permedia 2 card
> > (Diamond FireGL) on my SX164. The server detects 8mb, the symptoms go
> > away when I force video memory to 4mb or turn off accel. I'm not sure
> > how much memory the card actually has, so I thought it was just
> > misdetecting the size, but perhaps it's actually a more generic SX164
> > quirk...
> > 
> > Anyway, I suggest forcing video memory to something smaller, perhaps
> > it helps you, too.
> Thanks.  That worked.  I forced it to 4096 instead of 8192 and its now
> working without problems.
> for reference, here's my lspci -v info from the card:
> 00:07.0 VGA compatible controller: Matrox Graphics, Inc. MGA 2164W [Millennium II] (prog-if 00 [VGA])
>         Subsystem: Matrox Graphics, Inc.: Unknown device 2007
>         Flags: bus master, medium devsel, latency 32, IRQ 26
>         Memory at 0000000009000000 (32-bit, prefetchable) [size=16M]
>         Memory at 000000000a8a0000 (32-bit, non-prefetchable) [size=16K]
>         Memory at 000000000a000000 (32-bit, non-prefetchable) [size=8M]
>         Expansion ROM at 000000000a890000 [disabled] [size=64K]

Unfortunately, I don't think one can get the actual video RAM size from
looking at the "lspci" output, though that *would* be nice...

I, too, have had the same experience with a Permedia-2 based card (it
has 4MB but the drivers "detect" 8MB :-), and the symptoms are
identical.  And it doesn't appear to matter what platform it's in, the
driver always makes the mistake.

All the Millennium II's that I've seen have 4MB (4 chips) on the card
itself, and need the additional plugin "daughtercard" that holds more
memory (4MB, 8MB, and 12MB are the options, IIRC). So if you do NOT
have a daughtercard, you may only have the original 4MB...


Jay A Estabrook                            HPTC - LINUX support
Hewlett-Packard Company - MRO1-2/K15       (508) 467-2080
200 Forest Street, Marlboro MA 01752       Jay.Estabrook@hp.com

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