Bug 19363

Summary: Font corruption regression on RV250 with 6.9.0
Product: xorg Reporter: Robert Hancock <hancockrwd>
Component: Driver/RadeonAssignee: xf86-video-ati maintainers <xorg-driver-ati>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium Keywords: regression
Version: 6.9.0   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Screenshot showing font corruption
none
Xorg.0.log from X startup none

Description Robert Hancock 2009-01-01 15:27:14 UTC 
On my Compaq Presario X1000 laptop with ATI Mobility Radeon 9000 chipset, I am getting corruption of text displays with garbage lines of pixels above the characters in some situations. Will attach screenshot.

This is with xorg-x11-drv-ati from Fedora 10: xorg-x11-drv-ati-6.9.0-63.fc10.i386

With Fedora 9 which used the 6.8.0 driver I did not see this problem.
Comment 1 Robert Hancock 2009-01-01 15:28:36 UTC 
Created attachment 21621 [details]
Screenshot showing font corruption

See the junk pixels in the first body text under "Comment #9" and in the header text for "Comment #10".
Comment 2 Robert Hancock 2009-01-01 15:29:07 UTC 
Created attachment 21622 [details]
Xorg.0.log from X startup
Comment 3 Michel Dänzer 2009-01-02 03:15:56 UTC 
Does it still happen with 6.9.0.91 or current xf86-video-ati Git?

Does Option "RenderAccel" "off" work around it?
Comment 4 Robert Hancock 2009-01-04 14:26:21 UTC 
Disabling RenderAccel appears to work around the problem. I will try and get a newer version of the driver built and try that.
Comment 5 Robert Hancock 2009-01-04 15:31:58 UTC 
Current git does not appear to have the problem.. question is if there's a patch that could be backported into the Fedora 10 version..
Comment 6 Michel Dänzer 2009-01-05 00:37:38 UTC 
(In reply to comment #5)
> Current git does not appear to have the problem.. question is if there's a
> patch that could be backported into the Fedora 10 version..

git bisect should help isolate the change that fixed it.
Comment 7 Alex Deucher 2009-01-05 06:46:17 UTC 
It's probably:
783cdb7374941bb1d2b63eea375fbf2f1b808cc3
Comment 8 Robert Hancock 2009-01-05 16:27:08 UTC 
I don't think so, that commit refers to this Fedora bug:

https://bugzilla.redhat.com/show_bug.cgi?id=469556

which states the patch is in xorg-x11-drv-ati-6.9.0-61.fc10, so if that fixed it I would not be seeing this problem. Also that refers to EXA only, whereas this problem shows up in both XAA and EXA.
Comment 9 Robert Hancock 2009-10-11 13:07:23 UTC 
No longer a problem in Fedora 11.

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