** Description changed:
+ [Status]
+ Happens on Maverick. Tested with 2.6.36 and 2.6.38 (see comment #37) kernel.
+ Happens on Lucid.
+
[Workaround 1]
For Acer Extensa 5635Z with bios version V0.3219 or newer adding
acpi_osi=Linux acpi_backlight=legacy as boot parameter resolves the issue.
With kernel 2.6.38 (ubuntu mainlinine daily 20110219):
when I close and then open the lid the backlight comes back with roughly half
the brightness.
I can use workaround 2 to set the brightness to full again.
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