K 10 svn:author V 3 avg K 8 svn:date V 27 2020-05-05T12:14:11.781250Z K 7 svn:log V 606 acpi_video: try our best to work on systems without non-essential methods Only _BCL and _BCM methods seem to be essential to the driver's operation. If _BQC is missing then we can assume that the current brightness is whatever we set by the last _BCM invocation. If _DCS or _DGS is missing the we can make assumptions as well. The change is based on a patch suggested by Anthony Jenkins in PR 207086. PR: 207086 Submitted by: Anthony Jenkins