RealTek Wifi+Bluetooth dongle

[Daniel Hatton]

I bought the USB Bluetooth and Wifi dongle advertised at <https://www.amazon.com/dp/B0CGF9LVL9?ref_=pe_125775000_1044873430_t_fed_asin_title>, on the basis that having "Linux" in the name and "Libre" in the description meant a better-than-average chance of it working with Guix/Linux-Libre. The dongle appears in lsusb as

Bus 001 Device 004: ID 0bda:c820 Realtek Semiconductor Corp. 802.11ac NIC





1a2,7
> rtw88_8821cu           12288  0
> rtw88_8821c            90112  1 rtw88_8821cu
> rtw88_usb              28672  1 rtw88_8821cu
> rtw88_core            225280  2 rtw88_8821c,rtw88_usb
> mac80211             1503232  2 rtw88_core,rtw88_usb
> libarc4                12288  1 mac80211
89c95
< cfg80211             1298432  1 iwlwifi
---
> cfg80211             1298432  3 rtw88_core,iwlwifi,mac80211
92c98
< bluetooth             995328  13 btrtl,btmtk,btintel,btbcm,bnep,btusb
---
> bluetooth             995328  14 btrtl,btmtk,btintel,btbcm,bnep,btusb

The kernel definitely seems to be trying to do something with it; I've appended below a diff between the output of lsmod just before and just after plugging the dongle in. However, I'm still getting "No Wi-Fi Adapter Found", and unable to switch on Bluetooth, in the Gnome settings widget. What do folks think? Is there any hope of getting this dongle to work, or should I give up and stop wasting my time?

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