Same problem here with an nvidia board. A funny thing happens that make me think that it might not be due to the nvidia drivers, but to kdm itself or to how kde interacts with it:
if I switch to the free nv driver from the nvidia one, the black screen issue seems to be resolved, but another issue appears: the kdm welcome screen now appears at a wrong resolution/screen size. To explain better: I work at 1280 x 1024. When I log out, the kdm screen appears at a much lower resolution (likely 1024 x 768 or even lower) and the window is uncentered, because the whole screen can be panned left and right, up and down, moving the low resolution view over the 1280x1024 real screen size. Most definitively all caused by a kdm problem. -- [hardy] logout ends in blank screen https://bugs.launchpad.net/bugs/181343 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs