Public bug reported:
$ 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.
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
$ 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
+ 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
+ Gamma: 1.0:1.0:1.7
+ Brightness: 1.0
+ Gamma: 1.0:1.0:1.7
+ Brightness: 1.0
- As you can see, "Gamma" values printed by xrandr --verbose are exactly
- 1/<value set>...
+ 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>...
** Description changed:
$ 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>...
+ set>... Appart for value 1.0 which is correct.
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Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1444880
Title:
xrandr report inverted gamma values
Status in xorg package in Ubuntu:
New
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.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1444880/+subscriptions
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