I have also executed "lsusb -t" and it looks like it is displaying new device, then disappearing and appearing with new device again. See lsusb_t.txt attachment.
** Attachment added: "lsusb_t.txt" https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1589585/+attachment/4686324/+files/lsusb_t.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1589585 Title: Ubuntu Software tab Installed refreshing endlessly every 2 seconds Status in fwupd package in Ubuntu: New Status in gnome-software package in Ubuntu: New Bug description: I have fresh installed Ubuntu 16.04 Desktop 32-bit. After each install for years one of the first thing I do is uninstall some of the applications that I don't need to preserve some downloading/installing of applications that I don't need. I opened Ubuntu Software, click on Installed tab and now the problem appears. Every two seconds whole screen gets to gray and refreshing appears which takes 2 seconds. This loops endlessly. It is very frustrating, because Ubuntu Software is unusable in my case. I have asked the question on forum: http://ubuntuforums.org/showthread.php?t=2326701&p=13498876 and one of suggestion was to remove the software and install it back. I did: sudo apt install gnome-software sudo apt purge gnome-software sudo apt autoremove sudo apt autoclean sudo apt install gnome-software Started Ubuntu Software and the problem remains the same. P.S. New problem appeared now Ubuntu Software icon on Launcher is not the same (orange color), but it has changed (white color). But this is not huge problem, just annoyance. ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: gnome-software 3.20.1+git20160426.1.a976144-ubuntu-xenial-0ubuntu1 ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8 Uname: Linux 4.4.0-22-generic i686 ApportVersion: 2.20.1-0ubuntu2.1 Architecture: i386 CurrentDesktop: Unity Date: Mon Jun 6 18:18:47 2016 InstallationDate: Installed on 2016-06-03 (3 days ago) InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release i386 (20160420.1) SourcePackage: gnome-software UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/fwupd/+bug/1589585/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp