USB adapter TP-Link Archer T2U PLUS [RTL8821AU] found but no wifi network

English Hardware
21

Post:
zypper se -si rtl8821

22 
mitsos@tumbleweed:/etc/uefi/certs> zypper se -si rtl8821
Loading repository data...
Reading installed packages...

S  | Name                  | Type    | Version                | Arch   | Repository
---+-----------------------+---------+------------------------+--------+-------------------
i+ | rtl8821au-kmp-default | package | 20220205_k6.13.0_1-4.1 | x86_64 | Sauerland-hardware
i  | rtl8821au-ueficert    | package | 20220205-4.1           | x86_64 | Sauerland-hardware
mitsos@tumbleweed:/etc/uefi/certs> 
mitsos@tumbleweed:/etc/uefi/certs> 
mitsos@tumbleweed:/etc/uefi/certs>
23

Post:

lsmod | grep 8821
24 
mitsos@tumbleweed:~> sudo lsmod | grep 8821
mitsos@tumbleweed:~>

nothing happens
PS. thanks for your patience…

25

Post:
uname -a

26 
mitsos@tumbleweed:~> uname -a
Linux tumbleweed 6.13.1-1-default #1 SMP PREEMPT_DYNAMIC Mon Feb  3 05:33:25 UTC 2025 (1918d13) x86_64 x86_64
27

As root:
modprobe 8821au

after that:
lsmod | grep 8821

28 
mitsos@tumbleweed:~> sudo modprobe 8821au

modprobe: FATAL: Module 8821au not found in directory /usr/lib/modules/6.13.1-1-default
29

It will take a while, I have installed Tumbleweed in a Virtualbox to see, what is going wrong.

Maybe I have to blacklist something, I must see.

In Leap 15.6 it is working as expected.

30

Thanks a lot!!! I ll be here

31

Have you got this error:

zypper in rtl8821au-kmp-default 
Loading repository data...
Reading installed packages...
Resolving package dependencies...

Problem: 1: nothing provides 'ksym(default:dev_kfree_skb_any_reason) = 5d490ce0' needed by the to be installed rtl8821au-kmp-default-20220205_k6.13.0_1-4.1.x86_64
 Solution 1: do not install rtl8821au-kmp-default-20220205_k6.13.0_1-4.1.x86_64
 Solution 2: break rtl8821au-kmp-default-20220205_k6.13.0_1-4.1.x86_64 by ignoring some of its dependencies

Choose from above solutions by number or cancel [1/2/c/d/?] (c): c
32

No, nothing like that. When I run the command again:

mitsos@tumbleweed:~> sudo zypper in rtl8821au-kmp-default 
Loading repository data...
Reading installed packages...
'rtl8821au-kmp-default' is already installed.
Resolving package dependencies...
Nothing to do.
33

Try with -f (force)

zypper in -f rtl8821au-kmp-default

The OBS is slowly building new packages, I think it was a different between the Tumbleweed Kernel and the Tumbleweed-Kernel OBS is used.
Now all my Tumbleweed packages in Hardware are building new, maybe it will take some time.

See:

34

If you now install the drivers, it should work:

35

Here without any 8821au Hardware:

stephan@vbox:~> su
Passwort: 
vbox:/home/stephan # lsmod | grep 8821
vbox:/home/stephan # modprobe 8821au
vbox:/home/stephan # lsmod | grep 8821
8821au               3448832  0
cfg80211             1384448  1 8821au
usbcore               450560  6 ohci_hcd,ehci_pci,usbhid,ehci_hcd,8821au,ohci_pci
vbox:/home/stephan # uname -a
Linux vbox 6.13.1-1-default #1 SMP PREEMPT_DYNAMIC Mon Feb  3 05:33:25 UTC 2025 (1918d13) x86_64 x86_64 x86_64 GNU/Linux
vbox:/home/stephan #
36

It worked!!! thanks very very much!!!

37

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