I think I have find the problem New DELL keyboards haven't Numlock key but BIOS config has "Numlock active" on "Yes". I've have changed it to "No" and problem vanishes.
I suppose the system tries to change Numlock state and, if no movement is detected on keyboard or mouse all two became hanged. When the keyboard isn't a new DELL one, for some reason I don't know, sometimes doesn't work. I've changed all new Dell to "Numlock Active" to "No" -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1330255 Title: Unable to Detect USB Mouse and Keyboard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1330255/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
