Changing the memory split between ARM and GPU on the Raspberry Pi running Arch linux is simple. Just execute the following commands:
Open the config file:
sudo vim /boot/config.txt
`
- Change the gpumem settings:
* gpumem_256: GPU memory in megabyte for the 256 MB Raspberry Pi. (min:16 - max 192)
- gpumem512: GPU memory in megabyte for the 512 MB Raspberry Pi. (min 16 - max 448)
... gpu_mem_512=16 gpu_mem_256=128 ...
- gpumem512: GPU memory in megabyte for the 512 MB Raspberry Pi. (min 16 - max 448)
- Reboot
`sudo reboot