https://bugzilla.kernel.org/show_bug.cgi?id=108971
--- Comment #8 from Aaron Lu <[email protected]> --- If case 1 acpi_videoX interface works, then intel_backlight interface should also work since in the Win8 case(the firmware default case if we do not pass any acpi_osi= string), the acpi_videoX interface's backlight control is relayed to GPU driver. Can you please double check: boot with "acpi_backlight=video drm.debug=0xe" cmdline option, and manually change brightness file of both acpi_videoX and intel_backlight see if backlight change works, and after the test, capture dmesg and upload it, thanks. -- You are receiving this mail because: You are watching the assignee of the bug. ------------------------------------------------------------------------------ _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
