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/sandybridge/early_init.c#L116
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
[1]:
https://review.coreboot.org/cgit/coreboot.git/tree/src/mainboard/lenovo/x220/cmos.layout#n125
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