https://bugzilla.kernel.org/show_bug.cgi?id=32862





--- Comment #7 from Hector Martin <hec...@marcansoft.com>  2011-04-13 08:53:24 
---
Yes, I get:

acer-wmi: Acer Laptop ACPI-WMI Extras
acer-wmi: Brightness must be controlled by generic video driver

Brightness has been handled by the generic driver for a while, even with
acer-wmi loaded (with 2.6.37 too). However, somehow acer-wmi does something
that confuses the EC and breaks both BIOS POST on subsequent bootups and the
ACPI video brightness handling. So it's probably not related to brightness
support in acer-wmi, but rather something else that it does that triggers the
issue.

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