I bought a pretty new laptop, with Windows 10 installed when I bought it. On Windows everything was working fine, yet was not happy about Windows and I decided to install Linux Mint 18 (xfce).
Mint on my laptop is working fine, except for the built-in WiFi adapter. I tried quite some things to fix it, but with no succes.
The adapter is connected to wifi and for a few minutes it works fine. After that, the adapter can't find a DNS anymore. Pinging stops working and I basically have no internet.
Recently, I discovered that the problem can be (temporary) be solved by using:
~ $ sudo ifdown wlp2s0 && sudo ifup wlp2s0
The command gives this error:
Unkown interface wlp2s0
After that, the adapter works fine for a few minutes. It seemed to me that I was supposed to manually configure the network interface. So I added the following to the /etc/network/interfaces file:
auto wlp2s0
iface wlp2s0 inet static
address <IP here>
netmask 255.255.255.0
gateway <IP here>
dns-nameservers 8.8.8.8
Now I get these errors:
ifdown: interface wlp2s0 not configured
RTNETLINK answers: File exists
Failed to bring up wlp2s0.
Again, the adapter works fine for a few minutes. But when I reboot my laptop, the adapter is not being recognized anymore.
Is there any way to fix the problem permanently?
Laptop: Toshiba Sattelite C55D-C Network adapter: RTL8821AE
