Hmm, the vendor branch kernel works fine here:
root@OrangePi5Plus:~# uname -a
Linux OrangePi5Plus 6.1.43-vendor-rk35xx #1 SMP Wed May 29 01:45:25 UTC 2024 aarch64 GNU/Linux
@adamb
Probably there was some I/O error in your case?
Also, compared to my last test, there is no udev loop with constant 5% CPU load anymore: Orange Pi 5+ should we have switched kernel? - #51 by MichaIng