With kerne. 6.2.3 if I simply plug in a usb external drive, mount it and umount it, then the journal has a kernel Oops and I have submitted a bug report, that includes the journal output, at https://bugzilla.kernel.org/show_bug.cgi?id=217174 As soon as the usb drive is unmounted, the kernel Oops occurs, and the machine hangs on shutdown and needs a hard reboot. I have reproduced the same issue on three different machines, and in each case downgrading back to kernel 6.2.2 resolves the issue and it no longer occurs. This would seem to be a regression in kernel 6.2.3 Mike C