I just experienced this too. If you don't need them, remove the adb files from ubuntu, if you're passing the USB device onto the guest OS, you don't need them anyway.
FYI, I followed an install guide online, so just reversed the install line, e.g. sudo apt-get remove android-tools-adb android-tools-fastboot Sorry if its teaching you to suck eggs, I've just included it for others if they stumble over the same issue. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gvfs in Ubuntu. https://bugs.launchpad.net/bugs/1771394 Title: gvfsd-mtp hoovers up all memory Status in gvfs package in Ubuntu: New Bug description: When I run a Win7 Virtual Machine and attach my smartphone via USB (to run Samsung Smart Switch on the VM) gvfsd-mtp sucks up all of my 16G(!) of RAM and the system becomes unresponsive. This same workflow worked without issue in 14.04 LTS. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gvfs-backends 1.36.1-0ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: LXDE Date: Tue May 15 12:02:25 2018 InstallationDate: Installed on 2018-04-27 (18 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: gvfs UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gvfs/+bug/1771394/+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