Which Khadas SBC do you use?
VIM3 Basic
Which system do you use? Android, Ubuntu, OOWOW or others?
Ubuntu
Which version of system do you use? Khadas official images, self built images, or others?
vim3-ubuntu-20.04-gnome-linux-4.9-fenix-1.1.1-220725-emmc.img
Please describe your issue below:
I started using this version of the Ubuntu image, it supports OpenVPN very well. After upgrading the OS using “apt upgrade”, I can’t use OpenVPN and got an error like “openvpn–ERROR: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2)”.
I noticed that the updated OS’s kernel doesn’t have the builtin module /kernel/drivers/net/tun.ko, but the old one has.
Is there any reason for moving this module in the new upgrade, and whether openvpn can be re-supported in subsequent upgrades? @Frank @numbqq
Post a console log of your issue below:
updated OS:
old OS: