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[mt]

Dear Aircrack-ng Forum,

I have been using an internal Wi-Fi card and external Wi-Fi adapters with the Ubuntu 20.04.4 LTS release.  The kernel version I have been using is 5.13.0-44-generic.  The driver for the internal Wi-Fi card is rtw_8822ce and for the external Wi-Fi adapters is rtl8812au.  I had not observed any issues with this configuration. 

A clean install was performed on the desktop computer.  The kernel version had gotten upgraded to 5.13.0-48-generic.  When I connected the external Wi-Fi adapter to the desktop computer and installed the driver, it could no longer associate with the router.  Once I checked the Wi-Fi adapters in the 'Settings' menu of the Ubuntu desktop environment, the name of the external Wi-Fi adapter had gotten corrupted.  I did not observe any issues with the operation of the internal Wi-Fi card when the kernel had gotten upgraded to 5.13.0.48-generic.

I appreciate it if you can provide any insight into the problem I am observing.  Thank you.

[misterx]

I'm a bit confused. What does the internal adapter with rtw_8822cw have to do with this?

What github and what branch of rtl8812au are you using?

Have you checked dmesg/journalctl for issues?

[mt]

Dear misterx,

Thank you for your help.  I included the information for the internal Wi-Fi card with driver rtw_8822ce for informational purposes. I wanted to indicate that a device using a driver other than the rtl8812au does not have an issue when the kernel is upgraded to 5.13.0-48-generic. 

Below is the procedure I have followed to install the rtl8812au driver:

sudo rm -rf rtl8812au
sudo apt install dkms build-essential git -y
git clone https://github.com/aircrack-ng/rtl8812au.git
cd rtl8812au/
make && sudo make install

I have checked the content of dmesg.  I used the command 'sudo dmesg | grep -i 88XXau'.  Below is the output of the message:

[sudo] password for wtap-sd1:
[ 5.948689] 88XXau: loading out-of-tree module taints kernel.
[ 5.949679] 88XXau: module verification failed: signature and/or required key missing - tainting kernel
[ 14.217528] usb 1-2: 88XXau 9c:c9:eb:2c:fd:21 hw_info[d8]
[ 14.218451] usbcore: registered new interface driver rtl88XXau

Thank you for your help.  I appreciate it.

[misterx]

You'd have to see what changed exactly between these 2 kernel versions.

Another thing you can do is running a memtest overnight to check if you don't have any issue with the RAM (which could explain the corruption).

[mt]

Dear misterx,

Thank you for your suggestions.  I would like to indicate that the issue I reported occurred on two different platforms.  I performed a memtest on both of these platforms and the test passed without any issues.  I used a memory block size of 10 GB with 10 iterations on one platform and a memory block size of 2 GB with 10 iterations on the other platform.

One of the colleagues with whom I work in the industry indicated to me that as per his investigation a change in the rtl8812au driver in the github directory was causing the corruption issue.  The path for the link is 'https://github.com/aircrack-ng/rtl8812au.git'.  To overcome the issue, he used the previously loaded rtl8812au driver from the same 'https://github.com/aircrack-ng/rtl8812au.git' link.

I used the procedure he provided.  Now, the Wi-Fi adapter associates with the router on both of the platforms.

Thank you for the help you have provided.  I appreciate it.

[misterx]

What change?

[mt]

Dear misterx,

I could not get a plausible response from my colleague in the industry.  Thank you for the help you have provided.