1# Known issue 2 3- [Network issue in quick start](#Network-issue-in-quick-start) 4- [EXT4 fs error rootfs issue](#EXT4-fs-error-rootfs-issue) 5- [antsdr e200 UART console](#antsdr-e200-UART-console) 6- [Client can not get IP](#Client-can-not-get-IP) 7 8## Network issue in quick star 9 10- OS: Ubuntu 22 LTS 11- image: [openwifi img](https://drive.google.com/file/d/1fb8eJGJAntOciCiGFVLfQs7m7ucRtSWD/view?usp=share_link) 12 13If can't ssh to the board via Ethernet for the 1st time, you might need to delete /etc/network/interfaces.new on SD card (on your computer). 14 15If still can't ssh the board via Ethernet, you should use UART console (/dev/ttyUSBx, /dev/ttyCH341USBx, etc.) to monitor what happened during booting. 16 17## EXT4 fs error rootfs issue 18 19Sometimes, the 1st booting after flashing SD card might encounter "EXT4-fs error (device mmcblk0p2): ..." error on neptunesdr, changing SD card flashing tool might solve this issue. Some tool candidates: 20- gnome-disks 21- Startup Disk Creator 22- win32diskimager 23 24## antsdr e200 UART console 25 26If can't see the UART console in Linux (/dev/ttyUSB0 or /dev/ttyCH341USB0), according to https://github.com/juliagoda/CH341SER, you might need to do `sudo apt remove brltty` 27 28## Client can not get IP 29 30If the client can not get IP from the openwifi AP, just re-run "service isc-dhcp-server restart" on board and do re-connect from the client. 31