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3.3. Linux3.4 kernel image driver adaptation situation.............................................................. 35
3.4. Login account and password................................................................................................35
3.5. On-board LED light display control instructions.................................................................36
3.6. Description of automatic login for desktop version system.................................................37
3.7. The first time the Linux5.4 system starts to automatically expand rootfs........................... 38
3.8. Linux3.4 system automatic expansion rootfs instructions...................................................40
3.9. How to modify the linux log level (loglevel).......................................................................43
3.10. Ethernet port test................................................................................................................ 44
3.11. SSH remote login to the development board..................................................................... 45
3.11.1. SSH remote login development board under Ubuntu..........................................45
3.11.2. SSH remote login development board under Windows.......................................46
3.12. HDMI display test..............................................................................................................47
3.13. WIFI connection test..........................................................................................................48
3.13.1. The server version image connects to WIFI by command...................................48
3.13.2. The server version image is connected to WIFI graphically............................... 50
3.13.3. Test method of desktop version image.................................................................53
3.14. USB interface test.............................................................................................................. 55
3.14.1. Connect mouse or keyboard test..........................................................................55
3.14.2. Connect USB storage device test.........................................................................56
3.15. USB Ethernet card test.......................................................................................................56
3.16. USB camera test.................................................................................................................58
3.17. Audio test........................................................................................................................... 59
3.17.1. Headphone jack play audio test........................................................................... 59
3.17.2. Mic recording test................................................................................................ 61
3.17.3. HDMI audio playback test...................................................................................61
3.18. linux5.4 IR receiving test...................................................................................................62
3.19. linux3.4 IR receiving test...................................................................................................63
3.20. Hardware watchdog test.....................................................................................................65
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