Question

4

Wireless antenna does not appear despite its driver being installed

rated 0 times [ 4] [ 0] / answers: 1 / hits: 3559 / 3 Years ago, thu, may 13, 2021, 10:27:36

I have an external USB antenna whose driver was installed, yet does not appear in System Settings/Connections in Kubuntu 17.04. More information can be found in the original question about this issue (How Can I Enable a Realtek USB Antenna?).

Output of lsmod | grep 8812 & rfkill list all

$ lsmod | grep 8812

$ rfkill list all

$: hci0: Bluetooth

        Soft blocked: no

        Hard blocked: no

Output of sudo dkms status:

bbswitch, 0.8, 4.10.0-24-generic, x86_64: installed

bbswitch, 0.8, 4.10.0-26-generic, x86_64: installed

nvidia-381, 381.22, 4.10.0-24-generic, x86_64: installed

nvidia-381, 381.22, 4.10.0-26-generic, x86_64: installed

rtl8812au, 4.3.8.12175.20140902+dfsg, 4.10.0-24-generic, x86_64: installed

rtl8812au, 4.3.8.12175.20140902+dfsg, 4.10.0-26-generic, x86_64: installed

Outpus of modinfo 8812au | grep A811:

alias:          usb:v7392pA811d*dc*dsc*dp*ic*isc*ip*in*

Output of lsmod | grep 8812:

Nothing Displayed

Output of lsmod | grep 8812:

modprobe: ERROR: could not insert '8812au': Exec format error

Output of dmesg | grep -i -e rtl -e 8812:

[22538.388812] usb 2-14: Device not responding to setup address.

[65970.179027] 8812au: version magic '4.10.0-24-generic SMP mod_unload ' should be '4.10.0-26-generic SMP mod_unload '

Output of iwconfig & dmesg | grep 8812:

sarah@ConvergentRefuge:~$ iwconfig

eno1      no wireless extensions.

lo        no wireless extensions.

sarah@ConvergentRefuge:~$ dmesg | grep 8812

[ 2028.287249] RTL871X: rtl8812au v4.3.8_12175.20140902

[ 2028.287338] usbcore: registered new interface driver rtl8812au

[ 2033.979052] audit: type=1400 audit(1499387534.619:709): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7" pid=8812 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

[ 2623.150998] audit: type=1400 audit(1499388123.752:1185): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7-1000" pid=9914 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

[ 2623.170431] audit: type=1400 audit(1499388123.772:1186): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7-1000" pid=9915 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

[ 2623.252008] audit: type=1400 audit(1499388123.856:1187): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7" pid=9916 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

[ 2623.295266] audit: type=1400 audit(1499388123.900:1188): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7" pid=9917 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

[ 2628.207767] audit: type=1400 audit(1499388128.812:1189): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7-1000" pid=9918 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

[ 2628.252204] audit: type=1400 audit(1499388128.856:1190): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7-1000" pid=9919 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

[ 2628.302456] audit: type=1400 audit(1499388128.904:1191): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7" pid=9920 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

[ 2628.341144] audit: type=1400 audit(1499388128.944:1192): apparmor="DENIED" operation="mknod" profile="webbrowser-app" name="/dev/shm/lttng-ust-wait-7" pid=9921 comm="QQmlThread-ust" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000

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1 Year ago

answered 3 Years ago learty · Accepted Answer

First, verify that the module installed correctly:

sudo dkms status

We hope we see:

rtl8812AU, 5, 4.10.0-26-generic, x86_64: installed

Or similar.

Verify that the installed module covers your device, which is:

ID 0bda:a811 Realtek Semiconductor Corp.

Run, in the terminal:

modinfo 8812au | grep A811

We hope we see:

alias:          usb:v7392pA811d*dc*dsc*dp*ic*isc*ip*in*

alias:          usb:v0BDApA811d*dc*dsc*dp*ic*isc*ip*in*

Note that the second alias, 0BDA with A811 covers your device.

Is the module loaded?

lsmod | grep 8812

If not, load it:

sudo modprobe 8812au

Are there any errors or warnings you can post? Or does the wireless come to life? If not, check the log for informative messages:

dmesg | grep -i -e rtl -e 8812

EDIT: We see the problem here:

modprobe: ERROR: could not insert '8812au': Exec format error

I suggest that you correct it with:

 sudo apt-get purge rtl8812au-dkms 

 sudo apt-get install rtl8812au-dkms

 sudo modprobe 8812au

If there are errors or warnings, please post them.

EDIT2: I suggest that we try another approach.

sudo apt-get purge rtl8812au-dkms 

sudo apt-get install git

git clone https://github.com/jeremyb31/rtl8812AU.git

sudo dkms add ./rtl8812AU

sudo dkms install rtl8812AU/5

Reboot and let us hear your report.