Bug 195781

Summary:	Driver sets display gamma to unusable value
Product:	[Fedora] Fedora	Reporter:	Ralf Ertzinger <redhat-bugzilla>
Component:	xorg-x11-drv-nv	Assignee:	X/OpenGL Maintenance List <xgl-maint>
Status:	CLOSED RAWHIDE	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	dennisml
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-08-02 18:44:27 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ralf Ertzinger 2006-06-17 18:38:22 UTC

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,
either.

Version-Release number of selected component (if applicable):
xorg-x11-drv-nv-1.1.1-5

How reproducible:
Always

Steps to Reproduce:
1. Attach monitor which reports a gamma value via DDC
2. Look in Xorg log after startup for the gamma used
3.
  
Actual results:
Xorg uses the gamma value reported by the monitor, instead of 1.0 1.0 1.0 like
earlier releases

Expected results:
At least make this optional somehow.

Additional info:

Comment 1 Dennis Jacobfeuerborn 2006-06-18 23:37:22 UTC

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.

Comment 2 Joseph Sacco 2006-06-19 18:31:50 UTC

The 'xgamma' can be used to reset the gamma value.


-Joseph

Comment 3 Adam Jackson 2006-08-02 18:44:27 UTC

Actually a bug in xorg-x11-server, should be fixed in rawhide.