Bug 194143
| Summary: | horizontal ghosting with Metacity AIGLX compositing | ||||||||
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| Product: | [Fedora] Fedora | Reporter: | Ben Liblit <liblit> | ||||||
| Component: | metacity | Assignee: | Søren Sandmann Pedersen <sandmann> | ||||||
| Status: | CLOSED WONTFIX | QA Contact: | |||||||
| Severity: | medium | Docs Contact: | |||||||
| Priority: | medium | ||||||||
| Version: | rawhide | CC: | kem | ||||||
| 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: | 2006-08-15 02:56:47 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: | |||||||||
| Attachments: |
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Created attachment 130549 [details]
test image: four crosses on white background, no antialiasing
Created attachment 130550 [details]
buggy result, magnified; note ghosting to the right of each cross
Closing bugs related to the metacity compositor, since we no longer develop it. |
Description of problem: When AIGLX and Metacity compositing are enabled, I'm seeing a slight horizontal ghosting in all color channels. Assuming a white background, any non-white pixel is slightly faded out, and a very pale "ghost" of that pixel appears offset one pixel to the right of the original. The impression is as though the screen pixel grid were slightly offset from the pixels that are to be displayed, so that what I'm actually seeing is the effect of some kind of anti-aliasing. What should be crisp vertical lines end up being a bit blurred. The entire screen therefore ends up looking a bit fuzzy. This is especially noticeable with text, though it affects *all* pixels, not just painted text. This is difficult to describe; I'll attach some test images that should make the problem more clear. Version-Release number of selected component (if applicable): System is Fedora Core 5 with serveral components installed from the FC5 AIGLX RPM repository, including: libXcomposite-0.3-4 libdrm-2.0.1-2 mesa-*-6.5-5 metacity-2.15.0-6 xorg-x11-drv-i810-1.6.0-2 xorg-x11-server-Xorg-1.0.99.901-3 How reproducible: Consistently occurs at all times when Metacity compositing manager is enabled (gconf "/apps/metacity/general/compositing_manager" set to true). Does not occur if Metacity compositing manager is disabled. Steps to Reproduce: 1. Start up your favorite drawing program, such as The GIMP. 2. Paint a single black pixel on a white background. 3. Use "xmag" to zoom in on that black pixel. 4. Examine the color of the black pixel as well as the pixel just to it right. Actual results: The single black pixel on a white background appears as color #202020. The pixel immediately to the right has color ##dfdfdf. Expected results: The single black pixel should have color #000000. The pixel immediately to the right has color ##ffffff. Additional info: Hardware is a ThinkPad X40 with Intel 82852/855GM Integrated Graphics Device.