Just wanted to mention that this affects me too, but I have nothing notable to add to the discussion I'm afraid.
Are others also getting ACPI errors in dmesg when they change the brightness?
ACPI Exception: AE_AML_PACKAGE_LIMIT, Index (000000010) is beyond end of object (20090903/exoparg2-445) ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.PCI0.VGA_.GCBL] (Node f7016cf0), AE_AML_PACKAGE_LIMIT
for example.
Just wanted to mention that this affects me too, but I have nothing notable to add to the discussion I'm afraid.
Are others also getting ACPI errors in dmesg when they change the brightness?
ACPI Exception: AE_AML_ PACKAGE_ LIMIT, Index (000000010) is beyond end of object (20090903/ exoparg2- 445) PCI0.VGA_ .GCBL] (Node f7016cf0), AE_AML_ PACKAGE_ LIMIT
ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.
for example.