Debian User Guide

This guide focuses on the Debian12 Desktop system built by Radxa.

Default username and password

username : radxa
password : radxa

Accessing Devices

Option 1: Use HDMI monitor, USB keyboard and mouse

The desktop system can be seen on the HDMI monitor.

Option two: SSH

SSH service is enabled by default. You can view the IP of the device in the router management interface; or you can find the IP of the device by angryip of the computer host.

$ ping ip-of-device
$ ssh radxa@ip-of-device

Displays

The Orion O6 has five display ports, namely

• HDMI
• DP
• USBC 0
• USBC 1
• eDP

The hardware interfaces correspond to the system DRM Card as follows:

System DRM Card	hardware interface
/sys/class/drm/card0-DP-1	USBC 0
/sys/class/drm/card1-DP-2	HDMI
/sys/class/drm/card2-eDP-1	eDP
/sys/class/drm/card3-DP-3	USBC 1
/sys/class/drm/card4-DP-4	DP

Audio

Desktop mode

The sound setting interface of the desktop system displays the currently available audio output devices.

Correspondence between audio output devices and hardware interfaces

Audio Output Device	Hardware interface
Headphone	Headphone
Speaker	Speaker
HDMI / DisplayPort 2	USBC 0
HDMI / DisplayPort 3	HDMI
HDMI / DisplayPort 4	USBC 1
HDMI / DisplayPort 5	DP

Command line mode

List Playback Device

root@orion-o6:~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: cixsky1 [cix,sky1], device 0: hda hda-audio-codec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: cixsky1 [cix,sky1], device 1: dptx0_audio i2s-hifi-1 [dptx0_audio i2s-hifi-1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: cixsky1 [cix,sky1], device 2: dptx1_audio i2s-hifi-2 [dptx1_audio i2s-hifi-2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: cixsky1 [cix,sky1], device 3: dptx3_audio i2s-hifi-3 [dptx3_audio i2s-hifi-3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: cixsky1 [cix,sky1], device 4: dptx4_audio i2s-hifi-4 [dptx4_audio i2s-hifi-4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

List Capture Device

root@orion-o6:~# arecord -l
**** List of CAPTURE Hardware Devices ****
card 0: cixsky1 [cix,sky1], device 0: hda hda-audio-codec-0 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

System audio card and hardware interface

The physical interfaces correspond to the system audio card as follows:

Audio Device	Hardware interface
had had-audio-codec-0	Headphone/Speaker/F_AUDIO
dptx0_audio i2s-hifi-1	USBC 0
dptx1_audio i2s-hifi-2	HDMI
dptx3_audio i2s-hifi-3	USBC 1
dptx4_audio i2s-hifi-4	DP

F_AUDIO capture command

amixer cset iface=MIXER,name='Line1 Mic Switch' 1
arecord -Dhw:0,0 -c 2 -r 48000 -f S16_LE hda_line1_mic.wav

F_AUDIO playback command

amixer cset iface=MIXER,name='ClassD AMP Mute' 1
amixer cset iface=MIXER,name='HP Out Mute' 1
amixer cset iface=MIXER,name='Line2 Out Mute' 0
amixer cset iface=MIXER,name='Line2 Switch' 1
aplay -Dhw:0,0 -c 2 -r 48000 -f S16_LE hda_line1_mic.wav

Headphone capture command

amixer cset iface=MIXER,name='Headset Mic Switch' 1
arecord -Dhw:0,0 -c 2 -r 48000 -f S16_LE hda_hs_mic.wav

Headphone playback command

amixer cset iface=MIXER,name='ClassD AMP Mute' 1
amixer cset iface=MIXER,name='HP Out Mute' 0
amixer cset iface=MIXER,name='Line2 Out Mute' 1
amixer cset iface=MIXER,name='Headset Switch' 1
aplay -Dhw:0,0 -c 2 -r 48000 -f S16_LE hda_hs_mic.wav

Speaker playback command

amixer cset iface=MIXER,name='ClassD AMP Mute' 0
amixer cset iface=MIXER,name='HP Out Mute' 1
amixer cset iface=MIXER,name='Line2 Out Mute' 1
aplay -Dhw:0,0 -c 2 -r 48000 -f S16_LE hda_hs_mic.wav

USBC 0 playback command

aplay -Dhw:0,1 playback-songs.wav

HDMI playback command

aplay -Dhw:0,2 playback-songs.wav

USBC 1 playback command

aplay -Dhw:0,3 playback-songs.wav

DP playback command

aplay -Dhw:0,4 playback-songs.wav

WiFi/BT module

Supported list

• Radxa Wireless Module A8

Ethernet

When using iperf3 to test throughput, please first use the following instructions to modify the interrupt allocation.

echo 40 > /proc/irq/$(cat /proc/interrupts | grep eth0-0 | cut -d ":" -f 1)/smp_affinity

echo 40 > /proc/irq/$(cat /proc/interrupts | grep eth1-0 | cut -d ":" -f 1)/smp_affinity