Starting from 392a13923eb4d44a8bdb204922230e126b188fae I can not set Backlight for my PANEL: > xrandr --output PANEL --set Backlight 150 X Error of failed request: BadValue (integer parameter out of range for operation) Major opcode of failed request: 150 (RANDR) Minor opcode of failed request: 13 (RRChangeOutputProperty) Value in failed request: 0x3c Serial number of failed request: 28 Current serial number in output stream: 29
Please report the output of 'xrandr --props'
Using f695445b386050de346211baec5e487813187cfd PANEL connected 1600x900+0+0 (normal left inverted right x axis y axis) 423mm x 238mm Backlight: 0 (0x00000000) range: (0,255) _PanningArea: _OutputNumber: 2 (0x00000002) ConnectorNumber: 2 (0x00000002) ConnectorType: Panel SignalFormat: LVDS supported: LVDS You may wonder about "0" value. That's due to bug #24617, however controlling works without problem (and reporting backlight level after first change).
Using 392a13923eb4d44a8bdb204922230e126b188fae: PANEL connected 1600x900+0+0 (normal left inverted right x axis y axis) 423mm x 238mm Backlight: 255 (0x000000ff) range: (0,255) _PanningArea: _OutputNumber: 2 (0x00000002) ConnectorNumber: 2 (0x00000002) ConnectorType: Panel SignalFormat: LVDS supported: LVDS
Can you provide a verbose log file, please?
Found it. Fixed. commit a838114e998a779ce64b894bf8cc34f93647c001 Author: Egbert Eich <eich@freedesktop.org> Date: Mon Oct 19 17:36:16 2009 +0200 Fix backlight readout thru AtomBIOS. The correct value was not read out as 'Set' was called instead of 'Get'.
(In reply to comment #5) > Found it. Fixed. > commit a838114e998a779ce64b894bf8cc34f93647c001 Thanks.
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