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: [ 4.657715] ACPI Error: No handler for Region [ECSI] (00000000862594d8) [EmbeddedControl] (20210604/evregion-135) [ 4.657734] ACPI Error: Region EmbeddedControl (ID=3) has no handler (20210604/exfldio-265) [ 4.657754] ACPI Error: Aborting method \_SB.UBTC.ECWR due to previous error (AE_NOT_EXIST) (20210604/psparse-531) [ 4.658812] ACPI Error: Aborting method \_SB.UBTC._DSM due to previous error (AE_NOT_EXIST) (20210604/psparse-531) [ 4.659646] ACPI: \_SB_.UBTC: failed to evaluate _DSM (0x6) [ 4.659657] ucsi_acpi USBC000:00: ucsi_acpi_dsm: failed to evaluate _DSM 1 [ 4.659665] ucsi_acpi USBC000:00: failed to reset PPM! [ 4.659683] ucsi_acpi USBC000:00: PPM init failed (-5) Regards Oliver
