Problem
I had a Linksys WUSB 6300 dual-band USB WiFi adapter happily running on on my desktop PC with driver module 8812AU.
When I first got it to work I used the driver signing method to get it to work with Secure Boot. It worked fine with Kernel version 4.4.0-23-generic and later also with 4.4.0-24-generic where I resigned it after the update.
After the update to 4.4.0-28-generic resigning for some reason does not have the desired effect anymore and it does not seem to load the driver module 8812AU.
After updating to 4.4.0-38-generic the behavior remains the same.
The Additional Drivers tool now shows me this, so I am not sure if somehow the module files got messed up. I am pretty new to Ubuntu, so I wouldn't know how to tell. When it was still working it showed me this.
So in consequence the network adapter is not working and I am out of ideas what to check or do in order to get it back to work.
Details
lsusb
shows me that the adapter is recognized as USB device:
Bus 002 Device 002: ID 13b1:003f Linksys WUSB6300 802.11a/b/g/n/ac Wireless Adapter [Realtek RTL8812AU]
sudo lshw -C network
only shows me the Ethernet and the internal WiFi (it has a very similar name). It is an integrated WiFi adapter which is working poorly under Ubuntu and is thus not useful for me.
Note: 8821AE is the internal WiFi. I am trying to get 8812AU to run which is not listed here because it does not seem to be loaded.
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:03:00.0
logical name: enp3s0
version: 11
serial: 54:a0:50:d5:4b:0b
size: 10Mbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl8168g-2_0.0.1 02/06/13 latency=0 link=no multicast=yes port=MII speed=10Mbit/s
resources: irq:42 ioport:e000(size=256) memory:f7d00000-f7d00fff memory:f0000000-f0003fff
*-network
description: Wireless interface
product: RTL8821AE 802.11ac PCIe Wireless Network Adapter
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:04:00.0
logical name: wlp4s0
version: 00
serial: 54:27:1e:d6:91:8d
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=rtl8821ae driverversion=4.4.0-22-generic firmware=N/A ip=192.168.0.20 latency=0 link=yes multicast=yes wireless=IEEE 802.11abgn
resources: irq:46 ioport:d000(size=256) memory:f7c00000-f7c03fff
Running rfkill list all
shows that nothing seems to be blocked:
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Any help would be greatly appreciated!
Many thanks.
sudo modprobe -r rtl8821ae
and next:sudo modprobe 8812au
? Welcome to askubuntu.Additional Drivers
screen kept changing around inexplicably on me too during same boot visits. After picking a Nvidia driver to install the entire section disappeared altogether. Someone here told me this was because I picked a PPA to install from shrugs.rtl8812au-dkms
using Synaptic. Also read and download my fixit script so that after any kernel software update, you can fix that the driver broke again (until somebody fixes it). Cheers, Al