To make sure the methods are being called I tried to make the brightness keys change the volume instead, and it works. I have tried to use a modified DSDT table to remove OS checks on the screen brightness key methods and try several tricks like emitting a specific brightness code (just like the other simpler Fn keys do) to no avail. I have yet to notice any weird behaviour resulting from "acpi_osi=" argument, but it could be a problem later. I have tried "xev", cat /dev/input/eventX and even modifying the asus-wmi module to print messages of the commands it receives, and it doesn't receive the screen brightness key commands.
The key command never seems to reach linux. Therefore I don't get the "pretty" notifications of screen brightness changes. I tried the various "acpi_osi" and "acpi_backlight" options and the only thing that kind of works is passing "acpi_osi=" (empty) as a kernel option, but all this does is letting the BIOS handle the brightness itself. Screen brightness keys don't do anything on my Asus N56VZ notebook. Dmesg from v3.8 with patch from comment #19Īdd some debug print statement in acpi video moduleĭmesg from v3.8 with patch from comment #19 and comment #44ĭmesg from aarons kernel with acpi fixes and video.* flagsĪdd debug statement in intel backlight setting function
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