[coreboot] Re: graphic preallocated memory

Hi,

thanks for quick answer.

Sorry, it wasn't far away, but I missed it.

I tried and Windows report it. So it works.

But my point is to boot macOS. It boots, but graphic memory is still not 
right, even after having increased that memory.
So maybe there other parameter for graphic memory. I'm sure. I tried to 
find documentation on Sandy Bridge.

The annoying thing is that the Lenovo bios does it (after having 
unlocked the advanced menu), but not perfectly. So I guess that the 
problem is : how a macbookpro8,1 initialize that sandy bridge...

On 25.09.19 15:23, Paul Menzel wrote:
> Dear Jief, dear Michał,
>
> On 25.09.19 14:39, Michal Zygowski wrote:
>
> […]
> > DVMT... this terminology is so confusing. I think it refers to the UMA
> > memory which is configured here for x220:
> >
> > https://github.com/coreboot/coreboot/blob/master/src/northbridge/intel/sandy...
>
> Also, see `cmos.layout` [1].
> 11    0     32M
> 11    1     64M
> 11    2     96M
> 11    3     128M
> 11    4     160M
> 11    5     192M
> 11    6     224M
> > You can change that by changing the gfx_uma_size parameter in CMOS
> > configuration utility - nvramcui. It is a payload that modifies the CMOS
> > based runtime options.
>
> There is also the utility `nvramtool` in the directory `utils` 
> allowing you to read and set values from the operating system.
>
> Print current value:
>
> nvramtool -r gfx_uma_size
>
> To print all possible values:
>
> nvramtool -e gfx_uma_size
>
> To set a value (I believe):
>
> nvramtool -w gfx_uma_size=224M
>
> Kind regards,
>
> Paul