Although I have not had the opportunity to test this system as completely as my Inspiron 5547 I am convinced that for this platform as well the fix is in kernel 3.19 and am therefore closing this defect.
** Changed in: xorg (Ubuntu) Status: New => Fix Released -- 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/1437557 Title: [Dell Vostro 3550] Black screen on user switch. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1437557/+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