Ubuntu – New install – no network devices available – Realtek Device b822


I just purchased a Lenovo Yoga 730 15" laptop, and installed Ubuntu 16.04 in place of Windows 10. Install seemingly worked fine, but now I have no wifi device available. Tried a reinstall just to be sure, and the same issue is happening. I don't believe it to be a hardware issue, as wifi was working without issue on Windows before I wiped it out.

When I run rfkill list I see:

0: ideapad_wlan: Wireless LAN
Soft blocked: no
Hard blocked: no

But when I run lspci I only see one item in the list claiming to be a network device:

3a:00.0 Network controller: Realtek Semiconductor Co., Ltd. Device b822 (rev ff)

I have a USB wifi adapter and that gets me connected without issue, but obviously that is not the desired solution. Does anyone have any insight on what might be causing the issue?

Output from modinfo -p rtl8822be:

fix_rate: (int)
debug_level: (int)
swenc:Set to 1 for software crypto (default 0)
ips:Set to 0 to not use link power save (default 1)
swlps:Set to 1 to use SW control power save (default 0)
fwlps:Set to 1 to use FW control power save (default 1)
msi:Set to 1 to use MSI interrupts mode (default 1)
dma64:Set to 1 to use DMA 64 (default 0)
aspm:Set to 1 to enable ASPM (default 1)
debug:Set debug level (0-5) (default 0)
debug_mask:Set debug mask (default 0) (ullong)
disable_watchdog:Set to 1 to disable the watchdog (default 0)

Best Answer

The current Ubuntu kernel doesn't support this new adapter. You need to install a driver. Connect to the Internet and run in a terminal:

sudo apt install git dkms
git clone https://github.com/lwfinger/rtw88.git
sudo dkms add ./rtw88
sudo dkms install rtlwifi-new/0.6

Now reboot and disable Secure Boot in BIOS.

If there are any errors, please tell us in comments.