Yes, the log is correct; during the time since boot, I had just
finished downloading those 900MB of packages. In this specific case,
the interface disappeared just before or during the reboot. After the
reboot, the interface did not reappear because the hub remained
powered, and a physical reconnect was required to initialize it again.
The previous log was short because it contained only kernel messages.
This time, I am attaching the full output of journalctl -b for more
context.

thanks

вт, 27 янв. 2026 г. в 18:09, Greg KH [off-list ref]:

On Tue, Jan 27, 2026 at 05:38:36PM +0300, Ivan wrote:

quoted

The USB hub is brand new. Honestly, I don't even know how to trigger
this bug; it happens completely randomly.
The chip does not overheat. I performed a stress test using iPerf,
where the router acted as the server and my machine as the client,
receiving traffic at 1 Gbps with 10 parallel streams. Simultaneously,
I kept a USB flash drive in the hub, continuously reading data from
it. The system remained stable for over 30 minutes without any issues,
then I terminated the test.
This specific crash today occurred right after downloading 900MB of
packages. Apologies for the previous log; this time I have attached
the full journalctl log for better context.

Looks like the device disconnected right after booting, not after being
used for a while.  Are you sure that was the correct log?

thanks,

greg k-h