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[lixo1 <651590@xxxxxxxxxxxxxxxxxx>]

Hi, thanks for your interest. This issue is independent from ati or
xserver, because it happens during the boot time, before loading
modules.

After a long research with kernel list I discovered that this bug comes
from a conflict between video acpi and HP envy Bios model when setting
brightness to the initial value. It's a kernel/hp main tree issue.

Now, there is a patch available from the main kernel source, that is
shipped with kernel 2.6.38. It adds a backlight option in the boot. Here
the link: https://bugzilla.kernel.org/show_bug.cgi?id=21212

So, you can close this bug report. Thanks for your interest.


** Bug watch added: Linux Kernel Bug Tracker #21212
   http://bugzilla.kernel.org/show_bug.cgi?id=21212

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https://bugs.launchpad.net/bugs/651590

Title:
  ATI Radeon HD 5850 blank screen during boot