VRAM detection in controlfb.c

[Clint Hepner]

On Fri, Apr 28, 2000 at 12:07:45AM -0400, Daniel Jacobowitz wrote:
>
> On Thu, Apr 27, 2000 at 11:39:59PM -0400, Clint Hepner wrote:
> >
> > I recently added another 2MB of VRAM to my PM8500
> > with control video, and was dismayed when linux wouldn't
> > recognize it.  I remembered some discussion on this
> > issue about a month ago, but I haven't seen anything
> > since then.
> >
> > I got the most recent version of the stable kernel,
> > 2.2.15_pre20, and poked around a bit to try to understand
> > what was going on.  In the end, I just hardcoded the value
> > of bank2 after line 725 in controlfb.c to 1, to
> > override the kernel's failure to detect the memory
> > in bank 2. It worked; I can now drive my 17" monitor at
> > 1280x1024 @16bpp.
> >
> > My question is, is the problem only with detecting the
> > VRAM, or could there be problems addressing the VRAM as
> > well if the kernel isn't able to detect it on its own.
>
> No, there shouldn't be any problems.
>
> Two things:  pre20 from Linus or from Cort's tree or from one of the
> others?  Also, could I persuade you to see if 2.3 detects the memory
> properly?

I got pre20 from Paul's tree, at linuxcare.com.au. I can try a 2.3
kernel, but probably not until Monday.

Clint Hepner
Dartmouth College

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