On Sat, 2026-06-06 at 20:00 -0400, Frank McCormick wrote: > > > > > On 6/6/26 6:12 PM, nwe wrote: > > > On 6/6/26 5:00 PM, Chris Ramsden wrote: > > > > > > Jun 06 22:55:14 Zenbook kernel: usb 3-3.2: Device is not > > > authorized for > > > usage > > > > > I have never before noticed such a message. I suspect that is > > directly related to the problem, even if other classes of USB > > devices are working in spite of that message. Hopefully someone > > here on Debian User will know how to proceed. > > > > Another suspicious message is > > Jun 06 22:57:23 Zenbook mtp-probe[9326]: bus: 2, device: 10 was not > > an > > MTP device > > > Could it be related? > > USBGuard daemon running on many Linux distributions that blocks > hotplugged USB devices by default to prevent attacks. > To Jeffrey and Frank - yes it was USBGuard. I had quite forgotten I had installed it.
"If it ain't broke, I haven't fixed it enough yet." Many many thanks. Chris.
