Bug 592793

Summary: LCD picture quality regression 2.6.27 vs 2.6.33
Product: [Fedora] Fedora Reporter: sd.domrep
Component: xorg-x11-drv-intelAssignee: Adam Jackson <ajax>
Status: CLOSED NOTABUG QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 13CC: ajax, sd.domrep, xgl-maint
Target Milestone: ---   
Target Release: ---   
Hardware: i686   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Clone Of: Environment:
Last Closed: 2010-07-23 21:26:48 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
Digital photo of my LCD Fedora13/OpenSuse 11.1 none

Description sd.domrep 2010-05-16 23:01:45 UTC
Created attachment 414426 [details]
Digital photo of my LCD Fedora13/OpenSuse 11.1

Description of problem:
Please take a look at the digital picture of my screen.
Fedora 13 on the left side, OpenSuse 11.1 on the right.
It will explain you my problem clearly. 
I use i915GM video chipset and it produce screen picture which is unusable. It hurts my eyes after an hour or so.
Also output of "xrandr":  Subpixel:   horizontal rgb


Version-Release number of selected component (if applicable):
OpenSuse and Fedora 13 has all last updates.


How reproducible:


Steps to Reproduce:
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Actual results:


Expected results:


Additional info:

Comment 1 sd.domrep 2010-05-20 22:56:06 UTC
I am happy to say that I found source of my problems.
DRI2 module.

As long as I start Xorg with "Disable DRI2" in module section I have normal picture and I have normal smooth rotatin of the gears in "glxgears" test.
Output of the "glxgears" without dri2 module:
565 frames in 5.0 seconds = 112.932 FPS
559 frames in 5.0 seconds = 111.726 FPS
558 frames in 5.0 seconds = 111.590 FPS
554 frames in 5.0 seconds = 110.797 FPS
569 frames in 5.0 seconds = 113.742 FPS
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0"
      after 6301 requests (36 known processed) with 0 events remaining.

Output of TOP:
1676 vas       20   0 15784 4868 1760 R 52.6  0.3   0:03.75 glxgears
1032 root      20   0 53664  12m 7124 S 39.9  0.8   0:50.63 X

With DRI2 module i had no more then 20 FPS and unstable gears rotation.

Of course there is no H/W acceleration, bu there is no eyes problem and good picture.

Comment 2 sd.domrep 2010-07-23 21:26:48 UTC
My fault, I installed too many "freetype" on Fedora.