Re: [9fans] GeForece4 MX (Inno3D Tornedo)

["Russ Cox" <rsc@plan9.bell-labs.com>]

Do you have a bigger monitor?  I'd be interested to know
if the higher resolution modes work at all for you.

I tried a 0x0181 card recently and just could not get
it to do anything >= 1280x1024.  I made the clock
frequency change, but that wasn't enough.  It was as
though the "I am a mode < 1280 pixels wide" bit (0x04
in CRT 0x1A) was set, even though it was very clearly not set:
I could run in 1268x1024 just fine, but pushing it up to 1280
broke things.  Modes like 1600x1200 just gave completely
blank screens.

I traced through the VGA BIOS initializing the card
and still couldn't figure out what was going on in the
1280x1024 case.  The BIOS did not give 1600x1200 as a
mode option, though 1400x1050 was (and didn't shed any
light on the subject).  This was all in digital mode.

Finally I rewrote the driver to be almost exactly like
the XFree86 driver (even closer than the current one)
and then nothing worked, presumably because of some
bugs I introduced but didn't track down.  At this point
a week had gone by, and I gave up, threw out all the code
I'd changed, and just used VMware.  So much for Nvidia's
great backwards compatibility.

Sigh.