Still Facing wifi issues on ubuntu 20.04 LTS after following README.md

[shulnak09]

Hi all,

I recently got a new lenovo legion and dual boot the system with ubunto 20.04 LTS. I followed the steps sequentially as per README.md but still face issues for the realtek driver rtw_8852ce.

My kernel version is: 5.15.0-76-generic
My realtek_adapter is : rtw_8852ce

I followed these steps sequentially:

sudo apt-get update
sudo apt-get install make gcc linux-headers-$(uname -r) build-essential git
git clone https://github.com/lwfinger/rtw89.git
cd rtw89
make
sudo make install

After that, I tried to " sudo modprobe -v rtw". These are the drivers that were listed and it did not list rtw_8852ce
rtw_8851b rtw_8852ae rtw88_8723d rtw88_8821ce rtw88_8822c rtw88_pci
rtw_8851be rtw_8852b rtw88_8723de rtw88_8822b rtw88_8822ce
rtw_8852a rtw_8852be rtw88_8821c rtw88_8822be rtw88_core

Further, to see the error, I used the following command: " sudo dmesg | grep -e 8852 -e rtw", and got the following error:

[    1.500187] rtw89core: loading out-of-tree module taints kernel.
[    1.500317] rtw89core: module verification failed: signature and/or required key missing - tainting kernel
[    1.513050] rtw89_8852ce 0000:04:00.0: Direct firmware load for rtw89/rtw8852c_fw.bin failed with error -2
[    1.513055] rtw89_8852ce 0000:04:00.0: failed to early request firmware: -2
[    1.513162] rtw89_8852ce 0000:04:00.0: Direct firmware load for rtw89/rtw8852c_fw.bin failed with error -2
[    1.514349] rtw89_8852ce 0000:04:00.0: failed to wait firmware completion
[    1.514373] rtw89_8852ce 0000:04:00.0: failed to setup chip information
[    1.514688] rtw89_8852ce: probe of 0000:04:00.0 failed with error -22
[    2.968446] Bluetooth: hci0: RTL: examining hci_ver=0c hci_rev=000c lmp_ver=0c lmp_subver=8852
[    2.968449] Bluetooth: hci0: RTL: unknown IC info, lmp subver 8852, hci rev 000c, hci ver 000c

** I am new to this and have been struggling and for any any help from the community, I will be really grateful.**

Regards
Anshul

[lwfinger]

[ 1.513050] rtw89_8852ce 0000:04:00.0: Direct firmware load for rtw89/rtw8852c_fw.bin failed with error -2

You are missing the firmware for the device. Ubuntu should provide it, but you can download it from https:lwfinger.com/download. Copy file rtw8852c_fw.bin (as root) to /lib/firmware/rtw88/.

[shulnak09]

Hi lwfinger,

Thank you so much for your help. I remember doing this step but was copying the file to some other location.

Initially, I tried copying the rtw8852c_fw.bin (as root) to /lib/firmware/rtw88, it did not work, then I copied the file to rtw89 folder inside /lib/firmware and my wifi now works.

Thank a lot again for all your help. It means a lot. I have been struggling with this issue for past 4 days.

Regards
Anshul

[lwfinger]

That was my error. Copying to /lib/firmware/rtw89/ was correct.

You should have posted earlier. It should not take 4 days.