I'm using linux-5.11.1 so presumably not an issue for the 10.1 release but when booting LFS systemd I get
sudo systemctl status systemd-rfkill ● systemd-rfkill.service - Load/Save RF Kill Switch Status Loaded: loaded (/usr/lib/systemd/system/systemd-rfkill.service; static) Active: failed (Result: exit-code) since Sat 2021-02-27 15:16:47 GMT; 49s ago TriggeredBy: ● systemd-rfkill.socket Docs: man:systemd-rfkill.service(8) Process: 527 ExecStart=/usr/lib/systemd/systemd-rfkill (code=exited, status=1/FAILURE) Main PID: 527 (code=exited, status=1/FAILURE) Error: 5 (Input/output error) CPU: 1ms Feb 27 15:16:47 pc systemd[1]: Starting Load/Save RF Kill Switch Status... Feb 27 15:16:47 pc systemd-rfkill[527]: Read event structure of invalid size. Feb 27 15:16:47 pc systemd[1]: systemd-rfkill.service: Main process exited, code=exited, status=> Feb 27 15:16:47 pc systemd[1]: systemd-rfkill.service: Failed with result 'exit-code'. Feb 27 15:16:47 pc systemd[1]: Failed to start Load/Save RF Kill Switch Status. This line: "Read event structure of invalid size." has been reported by Redhat and elsewhere. I don't know if it's a kernel bug or a problem in systemd-247 but it didn't happen with kernel 5.10.16. jb. -- http://lists.linuxfromscratch.org/listinfo/lfs-dev FAQ: http://www.linuxfromscratch.org/faq/ Unsubscribe: See the above information page