Description of problem: It seems that some blue colors, such as that seen on the top bar of facebook or fedoraforum.org, aren't being reproduced accurately. They seem to appear more violet/purple than blue. This is noticeable when coming from using the Nvidia proprietary driver to nouveau. I've noticed this in Fedora 11 and 12 as well for two different nvidia cards (Quadro FX1500M and Geforce 9400M) Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. When using nouveau, in a web browser, go to http://www.fedoraforum.org 2. Examine the blue logo and blue sections 3. Install the Nvidia proprietary driver 4. Repeat steps 1 and 2 Actual results: The blue colors in nouveau appear to be more purple and violet than those in the Nvidia binary driver. Expected results: The blue colors should match. Additional info:
*** Bug 596624 has been marked as a duplicate of this bug. ***
*** Bug 596621 has been marked as a duplicate of this bug. ***
Created attachment 417573 [details] Screenshot of fedoraforum.org using nouveau driver Screenshot of fedoraforum.org using nouveau driver.
Created attachment 417574 [details] Screenshot of fedoraforum.org using nvidia driver Screenshot of the same page using the nvidia binary driver.
If you compare the screenshots between nouveau and nvidia drivers, you'll see the blue color is different. The nvidia driver seems to reproduce a more faithful color (as verified in Windows) than nouveau.
How very strange. I don't actually see this issue on the 3 cards I've used so far today, and don't have much of an idea yet on how this would even happen. I initially thought it could be a difference in how it was displayed on screen (so, different CLUT settings than nvidia), but that wouldn't effect a screenshot so there goes that idea.
Oh I worked out why this happens. I installed Google Chrome and noticed it didn't have the same problem. After a bit of detective work, I found out the culprit was that my firefox config had set the gfx.color_management.mode to 0. When I reset that back to default (2), it fixed it, ie. the blue colors are now proper. :)
Correction: Before, it was set to 1, not 0.
So, not a bug?
Hmm...depends on how you look at it I guess. On the nvidia binary driver, the color_management mode made no difference, which is probably normal behaviour, while on the nouveau driver, the blue colors were wrong. It happens in Thunderbird as well.
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