AMD Video BIOS Disassembler and ATi RS485

[Dave Airlie]

On Sat, 2009-01-10 at 05:25 -0500, Joshua C. wrote:
> 2009/1/10 Joshua C. <joshuacov at googlemail.com>:
> > 2009/1/9 Dave Airlie <airlied at redhat.com>:
> >> On Fri, 2009-01-09 at 22:14 +0100, Joshua C. wrote:
> >>> Any Idea how to use this with my RS485?
> >> I'm not working at the moment, but I was going to suggest rs485 people
> >> try booting with radeon.gartsize=32 to see if it helps.
> >>
> >> Dave..
> >
> > With 2.6.27.10-167.fc10.x86_64 I got `Unknown boot option
> > `radeon.gartsize=32': ignoring`. Did I miss something?
> >
> 
> OK I tried it. I still got the message "Unknow boot option", but it
> works fine. Without radeon.gartsize=32 everything is fine until the
> xserver starts. Modesetting works fine but when the Xserver start I
> get two-color-strips on my monitor. This doesn't happen when I set
> radeon.gartsize=32 and the Xserver starts right.
> This is a laptop and the video card can use from 32 up to 256 mb from
> the main memory.I've set it to 128mb. Maybe this can also help.
> 
> @Dave
> Thanx for the tip. It works once again. Does this gart table has
> something to do with the memory used by card? As I said, my other
> mashine with the same  radeon RS485 works fine without this option.
> The only difference is that I have 4GB memory (an a memory hole) with
> the non working card and 2GB with the working one.

It controls what parts of main RAM the card uses, however the hint about
having 4GB vs 2GB is probably useful, can you update the bug with that
info, and I'll try and think about it a bit more when I get back to the
office.

Dave.

>