Did you try to fix your dsdt (it has only one error, mine has 7 :-) )? Also you can download original & fixed dsdt from http://acpi.sourceforge.net/dsdt/view.php?manufacturer=ACER and fix yours by analogy. Did you try http://code.google.com/p/acpi-amilo/ Author writes it can be useful with Acers (it didn't help me though) Best, Nikolay