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
[1]: https://review.coreboot.org/cgit/coreboot.git/tree/src/mainboard/lenovo/x220...