The USB-based RTL8811CU also doesn't work, with suspiciously similar
errors:
Dec 25 21:43:37 home kernel: rtw_8821cu 1-2:1.0: Firmware version 24.11.0, H2C version 12
Dec 25 21:43:37 home kernel: rtw_8821cu 1-2:1.0 wlp0s20f0u2: renamed from wlan0
Dec 25 21:43:40 home kernel: rtw_8821cu 1-2:1.0: read register 0x5 failed with -110
Dec 25 21:43:41 home kernel: rtw_8821cu 1-2:1.0: read register 0x20 failed with -110
Dec 25 21:44:11 home kernel: rtw_8821cu 1-2:1.0: write register 0x20 failed with -110
Dec 25 21:44:12 home kernel: rtw_8821cu 1-2:1.0: read register 0x7c failed with -110
Dec 25 21:44:43 home kernel: rtw_8821cu 1-2:1.0: write register 0x7c failed with -110
Dec 25 21:44:44 home kernel: rtw_8821cu 1-2:1.0: read register 0x1080 failed with -110
Dec 25 21:45:16 home kernel: rtw_8821cu 1-2:1.0: write register 0x1080 failed with -110