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Hello, I'm member of vboxusers in Ubuntu 16.04 (4.10.0-40-generic) with Oracle VM Virtualbox Extension Pack installed. But the USB 2.0 dispositives are empty at all y my W8 guest installation. All the USB's stuffs can be used it in my Ubuntu without any problem! I wonder how can I fix it Any ideas? ...

I am very grateful for your help

luis@luis:~$ id uid=1000(luis) gid=1000(luis) grupos=1000(luis),0(root),1(daemon),2(bin),4(adm),6(disk),7(lp),8(mail),12(man),20(dialout),21(fax),24(cdrom),25(floppy),26(tape),27(sudo),29(audio),30(dip),34(backup),38(list),39(irc),44(video),45(sasl),46(plugdev),50(staff),100(users),101(uuidd),104(f...

The version is:

5.1.14r112924

Ubuntu 16.04, with W7 and w10, and not appears any usb device: luis@luis:~$ VBoxManage list extpacks Extension Packs: 1 Pack no. 0: Oracle VM VirtualBox Extension Pack Version: 5.1.14 Revision: 112924 Edition: Description: USB 2.0 and USB 3.0 Host Controller, Host Webcam, VirtualBox RDP, PXE ROM, Di...

The solution was simple: sudo chmod 755 /usr/lib

Thank you for your special form of make me learn: give a man a fish, and you feed him for a day; teach a man to fish, and you feed him for life.

I can not wait less than Socratis

Really, that's the problem in the end!?
There isn't solution??
Can I fix the permissions or must re-install ubuntu?

The permissions are: ls -al /usr drwxr-xr-x 12 root root 4096 sep 2 12:05 . drwxrwxrwx 28 root root 4096 feb 21 11:12 .. drwxr-xr-x 2 root root 118784 feb 21 13:21 bin drwxr-xr-x 2 root root 4096 sep 9 09:41 games drwxr-xr-x 68 root root 20480 feb 13 12:29 include drwxrwxrwx 202 root root 53248 feb ...

Failed to load R0 module /usr/lib/virtualbox/VMMR0.r0: World writable: '/usr/lib' (VERR_SUPLIB_WORLD_WRITABLE). Failed to load VMMR0.r0 (VERR_SUPLIB_WORLD_WRITABLE). Código Resultado: NS_ERROR_FAILURE (0x80004005) Componente: ConsoleWrap Interfaz: IConsole {872da645-4a9b-1727-bee2-5585105b9eed} I tr...