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Raspberry pi 3 rainbow screen

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General_Faliure:
the rainbow screen is usually because of the power supply being not strong enough.
For a pi 3 you need a good power supply of at least 2 Amp, preferably 2.5.

mahuti:
I've also had lockup issues (probably due to power supply issues) when adding artwork overlay files. Weird. Similar to the problem you mention.

nitrogen_widget:
also may need to do:
sudo apt-get dist-upgrade while in rpi2 to get the card to run in rpi3.

Blanka:
Just disable it. It has nothing to do with power issues, it is just a boot logo. You can at the same time disable smooth OpenGL scaling. If you want blocky pixels, it will interfere. If you disable smooth scaling, you will see the rainbow image is just 4 pixels, like the Windows Logo in 4 colours.


--- Code: ---sudo nano /boot/config.txt

comment:
# dtparam=audio=on

add:

disable_splash=1
disable_audio_dither=1
scaling_kernel=8

sudo nano /boot/cmdline.txt
dwc_otg.lpm_enable=0 console=ttyAMA0,115200 console=tty3 root=/dev/mmcblk0p2 rootfstype=ext4 elevator=deadline fsck.repair=yes rootwait quiet loglevel=3 consoleblank=0 vt.global_cursor_default=0 logo.nologo

sudo nano /etc/modules

comment out both snd-bcm2835 to #snd-bcm2835

sudo nano /lib/modprobe.d/aliases.conf

comment out to prevent conflict getting sound device index number
# options snd-usb-audio index=-2

--- End code ---
The other stuff deals with the USB audio interface (you will need that too, see other topic!)

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