Red Hat Bugzilla – Bug 195781
Driver sets display gamma to unusable value
Last modified: 2007-11-30 17:11:35 EST
Description of problem:
Since the update to the version below the nv driver seems to honour the Gamma
value reported by my monitor (Eizo S1910). The display has a fixed gamma of 2.2.
Earlier versions of the driver, however, used to ignore that and Xorg used a
gamma of 1.0, for which the monitor is set. Thus, the picture looks quite awful
with the new gamma.
Setting "Gamma 1.0" in the Monitor section of /etc/X11/xorg.conf does not help,
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Attach monitor which reports a gamma value via DDC
2. Look in Xorg log after startup for the gamma used
Xorg uses the gamma value reported by the monitor, instead of 1.0 1.0 1.0 like
At least make this optional somehow.
I'm seeing the same thing. You can try starting X with "startx -- -gamma 1.0"
(or modifying the respective line in the gdm config accordingly) as a
workaround. That does the trick for me.
The 'xgamma' can be used to reset the gamma value.
Actually a bug in xorg-x11-server, should be fixed in rawhide.