HI,
I have a problem with and FTDI-based device. It keeps dissapearing and
reappearing on every 1-2s or so. Nothing in dmesg to indicate failure.
I'm trying to make my way through systemd-udevd, but it's not easy to
debug things there ( neither is classic udev BTW).
udevadm monitor -u shows that whole interface is being released,
unbound,rremoved and then added again.
Interestingly, it behaves the same with --kernel as with --udev options.
So it seems that flurry of re/mount requests are coming from kernel
(5.4.43), not from something in rules setup - or so it seems now.
NO good, obvious reason why. Kernel shows no error, system-udevd log
show nothing.
It just repeats that add/remove cycle.
Daemon has -D option, which changes nothing for me - I still get the
same info back.
Is there a way to trace down which rule gets executed and why ?
udevadm test /dev/ttyUSB0 gets me nothing of use - just a list of rule
files that were parsed, not what was actually executed.
BTW, while slightly offtopic, is there somethign in kernel that would
get me more debug info ?
There used to be some "generate debug info" in USB stack some time ago...
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