I don't know if this is the same issue or not. I have a Dell Optiplex 745 that will hang while booting (blank screen). It will however boot fine if I select the 'advanced option for Ubuntu' from the boot loader and boot into 'recovery mode.' Once booted into 'recovery mode', selecting the 'resume normal boot' works just fine. I have this same issue with the 3 different Dell Optiplex computers so this is not hardware on just one computer.
The previous version of Ubuntu (13.10) worked fine with the same hardware. It was only after the system update to 14.04 that this began to happen. Ubuntu 14.04 with Linux 3.13.0-36-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1329384 Title: [Dell PowerEdge R220] 12.04/14.04 Ubuntu Server 32 bit installer does not boot without acpi=off To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1329384/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
