CMA – Dynamic Memory Split

[OlDrunk]

Any one here tried setting up CMA on there RetroPie and how well did it work? I have the old 256M RPi and was considering trying CMA – Dynamic Memory Split so my pi can still be used for other things when not playing games.

[dk999]

Hi Guys!
Tried to use CMA on my Pi with Firmware 3.12.35+, though I only get a “lwl0: error creating SDL Window” and be greeted by the terminal instead of Emulationstation.

I’ve got the 512 B+ Model and the following cmdline.txt

dwc_otg.lpm_enable=0 console=ttyAMA0,115200 kgdboc=ttyAMA0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline rootwait coherent_pool=6M smsc95xx.turbo_mode=N

and config.txt

disable_overscan=0
overscan_scale=1

overscan_left=16
overscan_right=16
overscan_top=16
overscan_bottom=16

hdmi_group=1
hdmi_mode=16

arm_freq=1000
core_freq=500
sdram_freq=500
over_voltage=6
over_voltage_sdram=4
avoid_safe_mode=1
gpu_mem=256
gpu_mem_256=160
gpu_mem_512=416
cma_lwm=16
cma_hwm=32
force_turbo=0
overscan=1

It doesn’t work, no matter what I’m doing with the gpu_mem_512 line. It’s like emulationstation doesn’t like the cma-commands at all.
By the way, when using i.e. 384MB for the gpu as a fixed value ( no CMA ), I only get a blank white screen for emulationstation.

Any suggestions?

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