RMP-driver-dat-setup.md
find out more at troubleshooting section: https://github.com/hzeller/rpi-rgb-led-matrix#troubleshooting
improve display update
Suggestion: to slightly improve display update, add isolcpus=3 at the end of /boot/cmdline.txt and reboot (see README.md)
nano /boot/firmware/cmdline.txt
To disable the built-in sound card (Broadcom BCM2835 ALSA) on a Raspberry Pi 3, you can follow these steps:
sudo nano /boot/firmware/config.txt
dtparam=audio=off
After reboot, the built-in sound card should be disabled. You can verify with:
aplay -l
root@raspberrypi:/home/pi/rpi-rgb-led-matrix-master# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: vc4hdmi [vc4-hdmi], device 0: MAI PCM i2s-hifi-0 [MAI PCM i2s-hifi-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
sudo nano /etc/modprobe.d/raspi-blacklist.conf
blacklist snd_bcm2835