Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1444880
Title:
xrandr report inverted gamma values
Status in xorg package in Ubuntu:
Confirmed
Bug description:
$ xrandr --output VGA1 --gamma 1:1:1.7
$ xrandr --verbose | grep -iE '(gamma|bright)'
Gamma: 1.0:1.0:1.7
Brightness: 1.0
Gamma: 1.0:1.0:0.59
Brightness: 1.0
$ xrandr --output VGA1 --gamma 1:1:.6
$ xrandr --verbose | grep -iE '(gamma|bright)'
Gamma: 1.0:1.0:1.7
Brightness: 1.0
Gamma: 1.0:1.0:1.7
Brightness: 1.0
As you can see in output of commands above, "Gamma" values printed by
xrandr --verbose are exactly the invert of the values set: 1/<value
set>... Appart for value 1.0 which is correct.
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