Radeon Xpress 200G Memory size

[Alex Deucher]

On 1/20/06, Erwin Rol <mailinglists at erwinrol.com> wrote:
> Hey all,
>
> I have a question, what are the relations between the different ways of
> checking how much memory is used for the integrated graphics chip in the
> Radeon Xpress 200 ? I tired lspci (the size of the largest PCI region,
> xorg.logs (the size int10 reports as is found in the Xorg.log file),
> grub (the memory grub reports at the boot screen) and windows XP64 (the
> size the XP device manager reports) to check how much memory is used.
> When i select 16M, 32M, 64M or 128M in the BIOS for the UMA size i get
> the following values.
>
> BIOS    lspci   xorg    xp64    grub
> 16M     64M     3072k   16M     632k/2078656k
> 32M     64M     7168k   128M    632k/2062272k
> 64M     128M    15360k  128M    632k/2029504k
> 128M    256M    31744k  256M    632k/1963968k
>
> These values just look weird to me, is there a explanation on why they
> look like that ?

Xpress chips need to be treated like IGP chips (the info->isIGP flag
must be set in the driver) so ram detect is currently wrong in the
xorg driver (this should be fixed by daniels latest commit in xorg
cvs).

Alex

>
> TIA,
>
> Erwin
>
>