Same problem on IBM System x3400 M2, Ubuntu 14.04.3. Zoltán Maróti solution indeed improved the graphical interface. The problem here is that the text terminals (ctrl-alt-Fx) or booting in text mode without loading lightdm renders an unreadable screen with green squares or blue lines . I wonder if it is a consequence of the same bug or not. If anyone observed the same problem please let us know.
Same problem on IBM System x3400 M2, Ubuntu 14.04.3. Zoltán Maróti solution indeed improved the graphical interface. The problem here is that the text terminals (ctrl-alt-Fx) or booting in text mode without loading lightdm renders an unreadable screen with green squares or blue lines . I wonder if it is a consequence of the same bug or not. If anyone observed the same problem please let us know.