Under 11.04, I guess one way is to grep/search for 'usb' string in /var/log/dmesg - or maybe even easier again for 'Logitech' string: $ grep Logitech /var/log/dmesg However, this with the "system log" is not necessarily fixed - on Ubuntu 10.04, I simply look in /var/log/messages - but in 11.04, the 'Logitech' string shows in these files: $ grep -files-with-matches -recursive Logitech /var/log 2>/dev/null To say a couple more words on the mouse under Ubuntu - you can inspect the system log, to see what was logged upon boot, in respect to, say, USB devices - to see if the device is recognized at all. I just had a problem with my mouse - and it turned out it was a hardware one ( it is one of those Logitech Wireless USB mice, which have a 'smooth scroll' option on the middle button wheel - you press it once, you have 'smooth scroll', press it once more, then you have 'stepped' scroll.) Turns out, my middle wheel was stuck, so I had to press it a couple of times until it 'recovered' - and I used xev (on Ubuntu 10.04) to control this.
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