[Bug 518387] Re: [gm45] black screen on bootup with kernel 2.6.32-12

[Chris Halse Rogers]

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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