Hi Guys
Sorry for the late response, but I've been away.
Chaley, I did your suggestion, but it does not appear to help. It's a strange one indeed!
Bernie - thanks for the link. I looked through there and it could possibly be something low level like this. I don't have any USB devices as such plugged into the system, just a hub, and my keyboard/mouse dongle, see below:
Code:
ant@localhost ~log % calibre-debug -d
calibre 3.14 embedded-python: True is64bit: True
Linux-4.13.16-100.fc25.x86_64-x86_64-with-fedora-25-Twenty_Five Linux ('64bit', 'ELF')
('Linux', '4.13.16-100.fc25.x86_64', '#1 SMP Mon Nov 27 19:52:46 UTC 2017')
Python 2.7.12
Linux: ('Fedora', '25', 'Twenty Five')
Interface language: None
USB devices on system:
[['0xbda', '0x129', '0x3960', u'Generic', u'USB2.0-CRW', u'20100201396000000'],
['0x46d', '0xc52b', '0x2401', u'Logitech', u'USB Receiver', u''],
['0x5986',
'0x670',
'0x4252',
u'Bison',
u'Lenovo EasyCamera',
u'200901010001'],
['0x8087', '0x7dc', '0x1', u'', u'', u'']]
No disabled plugins
Looking for devices of type: MTP_DEVICE
No MTP devices connected to system
Looking for devices of type: SMART_DEVICE_APP
All IP addresses {'lo': [{'addr': '127.0.0.1', 'netmask': '255.0.0.0', 'peer': '127.0.0.1'}], 'wlp3s0': [{'addr': '192.168.88.251', 'broadcast': '192.168.88.255', 'netmask': '255.255.255.0'}]}
No device is connected
Looking for devices...
Devices possibly connected: None
ant@localhost ~log % uname -a
Linux localhost.localdomain 4.13.16-100.fc25.x86_64 #1 SMP Mon Nov 27 19:52:46 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
I see that they mentioned in that post, that Fedora could be an issue. I'm currently on Fedora 25, as can be seen in the code snippet.
I thought I'd try removing the usb hub, and check, but still no joy.
Thanks guys for your suggestions in trying to sort this out, it really means a lot to me.