I: # uname -r 4.9.0-6-amd64
# uname -m x86_64 have a WiFi Dongle 802.11 AC Wireless Network Adapter: // __ ZTESY USB 3.0 WiFi Dongle 802.11 AC Wireless Netzwerk Adapter mit Dualband 2,4 GHz/300 Mbps + 5 GHz/866 Mbps 5 dBi High Gain Antenne https://www.amazon.com/-/de/Adapter-1200Mbps-TECHKEY-Wireless-Network-300Mbps/dp/B07J65G9DD/ which is detected as Realtek (apparently because this is the chipset they use?) # dmesg | grep Realtek [ 527.774047] usb 1-2: Manufacturer: Realtek # dmesg | grep "usb 1-2" [ 527.624365] usb 1-2: new high-speed USB device number 10 using ehci-pci [ 527.774027] usb 1-2: New USB device found, idVendor=0bda, idProduct=b812 [ 527.774037] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 527.774042] usb 1-2: Product: USB3.0 802.11ac 1200M Adapter [ 527.774047] usb 1-2: Manufacturer: Realtek [ 527.774051] usb 1-2: SerialNumber: 123456 So, I installed the suggested firmware https://packages.debian.org/stretch/firmware-realtek firmware-realtek (20161130-5) but thing doesn't work. Yo don't even see the its led lighting up. Realtek doesn't seem to be a Linux shy company. On their website they advertise drivers going all the way back from windows XP to 10 as well as for Macs and Linux: https://www.realtek.com/en/component/zoo/category/rtl8812bu-software https://wiki.gentoo.org/wiki/AC1200_Wireless_Adapters I know the thing works because I have tried it on the same labtop under a Windows installation and other Windows boxes and it works just fine without any kinds of hassles. Any idea how could I troubleshoot the actual problem in a more detailed way and fix it? lbrtchx