Thanks for your response, Christopher. I updated my BIOS to the latest version available:
JBET48WW (1.13 ) 04/20/2015 Unfortunately, nothing has changed. The system still behaves like in the initial post of this report. ** Changed in: xorg (Ubuntu) Status: Incomplete => New -- 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/1454160 Title: External monitor is disabled after resume (only on 15.04) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1454160/+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