http://bugzilla.kernel.org/show_bug.cgi?id=13887
--- Comment #31 from vaibhav <[email protected]> 2009-12-22 18:17:56 --- Created an attachment (id=24257) --> (http://bugzilla.kernel.org/attachment.cgi?id=24257) dsdt after latest bios for acer 4736z I am attaching dsdt after bios upgrade. xrandr doesn't work in default mode, which is kernel mode. It works in native/legacy/combination mode. ----------------------------- $ xrandr --prop BACKLIGHT_CONTROL: kernel supported: native legacy combination kernel BACKLIGHT: 0 (0x00000000) range: (0,9) $ xrandr --output LVDS --set BACKLIGHT 9 It doesn't change the brightness. ------------------------------ $ xrandr --output LVDS --set BACKLIGHT_CONTROL native $ xrandr --prop BACKLIGHT: 2890 (0x00000b4a) range: (0,2890) reducing the value of backlight makes screen brighter. ------------------------------ $ xrandr --output LVDS --set BACKLIGHT_CONTROL legacy $ xrandr --prop BACKLIGHT: 208 (0x000000d0) range: (0,255) This is the best mode i can reduce the brightness to near black by increasing value of BACKLIGHT or increase brightness by going below current value 208. In other modes (native/combination) corresponding of legacy BACKLIGHT 208 is the least bright mode. e.g. native.BACKLIGHT 2890 == legacy.BACKLIGHT 208. --------------------------------- $ xrandr --output LVDS --set BACKLIGHT_CONTROL combination $ xrandr --prop BACKLIGHT: 1445 (0x000005a5) range: (0,1445) brightness increases by decreasing value of BACKLIGHT --------------------------------- I am not clear what different mode mean, I just had googled for how to change BACKLIGHT using xrandr and posted results here. Please let me know if you need something more. -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ acpi-bugzilla mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
