On Wed, Aug 11, 2021 at 04:47:13PM +0200, Oliver Neukum wrote: > > On 11.08.21 15:23, Heikki Krogerus wrote: > Hi, > > Because of BIOS bugs. > > > > Ideally we should be able to rely on the _STA method of the ACPI > > device, but unfortunately with UCSI we can't rely on that alone. On > > some systems the BIOS claims that the device is enabled (based on > > _STA) even when the platform doesn't actually support UCSI at all. > > > > If you remove the check, does the driver work? > > Unfortunately, no it does not: OK, so your laptop does not support UCSI even though the BIOS claims it does. thanks, -- heikki