Right, this is essentially bug 1040526 . Lightdm (the login manager) can't cope with the 8 bit pseudo colour and completely screws up its display. Once you log in (by just typing your password) the display is okay (all be it in 8 bit).
For the live/desktop ISO install I had selected to login automatically and this is why I wasn't seeing the problem on that install. Workaround is to increase the colour depth via an xorg.conf (as you say): Section "Screen" Identifier "Screen0" DefaultDepth 24 EndSection Or turn on KMS. If KMS is not selecting an appropriate modeline then you should be able to define your own like you've done before, but called the mode "800x600" instead of "800x600_60.00". It'll probably want to put you into "1024x768" so make sure you define a modeline for that. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1044180 Title: Screen Freeze on Bootup - Lubuntu 12.10 PPC Alternate Aug 30 Build To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/lightdm/+bug/1044180/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
