I had seens some stuff related to the ACPI OSI variable in the DSDT a while back, related to brightness. However, a quick test with acpi_osi="Windows 2001" and another with acpi_osi="Linux" on the kernel's command line did not help much :-(
I had seens some stuff related to the ACPI OSI variable in the DSDT a while back, related to brightness. However, a quick test with acpi_osi="Windows 2001" and another with acpi_osi="Linux" on the kernel's command line did not help much :-(