Comment 71 for bug 459639

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Rolf Bensch (rolfbensch) wrote :

While analysing this problem dont't forget that vga16 and nvidia (and other graphic drivers) are sharing the same primary frame buffer device "/dev/fb0" (https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/459639/comments/52).

Vga16 is the first available graphics driver at boot time, and will be replaced by other graphic drivers later on.

In kdm.conf the watched event "graphics-device-added fb0 PRIMARY_DEVICE_FOR_DISPLAY=1" isn't secure if a 2nd graphics driver is used.

To fix this, a new event should be emitted from all graphics drivers or from upstart or from udev or ... as start condition for kdm.conf. And upstart must know if there is any other graphics installed beside vga16 (ok, typically on every home and business pc, but what's about small systems and servers).