You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
Copyright (c) 2012 Broadcom<br />
version 317494 (release)<br />
Get the latest firmware version<br />
The GPU firmware and kernel can be updated with Hexxeh's rpi-update tool<br />
(https://github.com/Hexxeh/rpi-update) .<br />
However this requires the Pi to be successfully booted. With sdcard problems, you may<br />
not get that far, so can try a manual udpate. If you have a Linux machine, rpi-update can<br />
be run on that in an offline mode, and will update your sdcard from the Linux machine.<br />
Otherwise, on a Windows computer, you will see the "/boot" partition appear as the<br />
contents of <strong>SD</strong> card. You can download the latest GPU firmware version here<br />
(https://github.com/raspberrypi/firmware/blob/master/boot/start.elf) . Click on view raw,<br />
then save it, and put the new start.elf file on the sdcard replacing the existing one.<br />
Similarly, the latest kernel is here (https://github.com/raspberrypi/firmware/tree/master/<br />
boot/kernel.img) . After updating these files you should be able to boot. You still need to<br />
run rpi-update to update the kernel modules (in /lib/modules) and the GPU libraries (in<br />
/opt/vc).<br />
Choosing the right ARM/GPU memory split<br />
There is a choice of how the 256M/512M of RAM is divided between the ARM and<br />
GPU:<br />
gpu_mem=16 : 16M GPU, 240M/496M ARM split : Maximum ARM memory. Good for ARM desktop use. No accelerated<br />
gpu_mem=64 : 64M GPU, 192M/448M ARM split : Reasonable ARM memory. Simple video (omxplayer) or 3D (quake<br />
gpu_mem=128 : 128M GPU, 128M/384M ARM split : Use this for heavy 3D work, or 3D plus video. Needed for XBM<br />
To switch, edit the gpu_mem= setting in your config.txt and reboot.<br />
Note: other amounts are also possible, but setting gpu_mem=32 is usually the wrong<br />
choice. gpu_mem=16 is almost always a better choice.<br />
Also note that before the release of the 51MB PI a different method was used based on<br />
splitting the 256MB RAM in a part for the CPU and GPU. As this noting system was<br />
causing trouble if the amount of RAM was not always the same. the above new method<br />
was adapted.<br />
Make sure your editor doesn't change the first letter of the line into an uppercase letter, as<br />
some editors do. The entry is case sensitive.
Change language