It seems that sometimes, particularly with multi-gpu systems, vga16fb
claims fb0 ahead of a kernel modesetting driver. This results in a
blank display.
Note that even when a kernel modesetting driver is loading first and
claiming fb0 there are side-effects to having vga16fb loaded and
providing fb1 - bug #527369 is an example. I'm leaving this as a
separate bug as it's got very different symptoms and may not necessarily
be fixed by the same process.
@vladilinsky: It would be useful if you could provide dmesg logs from a
failed boot just to check that we're on the right track
** Package changed: xserver-xorg-video-intel (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Summary changed:
- [gm45] black screen on bootup with kernel 2.6.32-12
+ vga16fb sometimes claims fb0 before kms driver, a causing blank screen on boot
--
vga16fb sometimes claims fb0 before kms driver, a causing blank screen on boot
https://bugs.launchpad.net/bugs/518387
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