@RogerArcherA9 May I know who is your ISP, and what is the WAN connection type on the A9? Please confirm if you have a stable connection all the time with the ISP modem by connecting the computer...

@Cannie OK, we can communicate the issue via email.

@Amarjyoti Which website did you try to download the firmware? Can we have the link for the website? We will confirm if that is uploading with an issue. You can wait and check for the new firmware...

@EnzoConqueror The hidden wireless network is used to build up the mesh wireless network system, which we call it Onemesh. For more details, please refer to the below article, which will help answer...

@SuprakashDutta Will this Ubuntu 16 get a valid IP address from the C6 router when you plug it directly into one of the LAN ports? BTW, is it connecting directly to the router, or there are some...

@Anniesting May I know the model of the TP-Link device? You can find it on the device bottom label, which is like Archer C6 or A6.