If the problem doesn't depend on gdm maybe its related to this one. https://bugs.launchpad.net/ubuntu/+bug/203206: In single-user mode I have a similar issue. The screen looks like on a error/alert message but there is only coloured background and no text on it. But I've no idea how to figure out, which package is related to this bug.
If the problem doesn't depend on gdm maybe its related to this one. https:/ /bugs.launchpad .net/ubuntu/ +bug/203206: In single-user mode I have a similar issue. The screen looks like on a error/alert message but there is only coloured background and no text on it. But I've no idea how to figure out, which package is related to this bug.