Bug 79165

Summary: Firefox address bar text corruption (1 of 2)
Product: xorg Reporter: Christopher Chavez <chrischavez>
Component: Driver/intelAssignee: Chris Wilson <chris>
Status: RESOLVED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: chrischavez, goetzchrist
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
Xorg.0.log for i865G
none
another Xorg.0.log for i865G
none
working, new Xorg.0.log none

Description Christopher Chavez 2014-05-24 04:52:57 UTC 
Note: The component may be Lib/Xrender but Driver/intel was chosen due to platform-specific issues.

This is the first of two bug reports I am filing, since the symptoms are distinct.

I am using Ubuntu 14.04 with an Intel 82865G.
I and a few other users encountered an issue in Firefox (also using certain Intel IGPs, various distributions) where a recent feature added to Firefox (essentially, an auto-disappearing forward button) causes text in the address bar to become obscured/replaced by rectangles: see link.
https://bugzilla.mozilla.org/show_bug.cgi?id=1005501

While the Firefox team is considering implementing their own workaround, the underlying problem is through Xrender, since the proposed workaround is to disable it in Firefox. I am adding this bug report to document this as an example, given the number of various corruption bugs out there, to see if this can be connected with others, feedback on additional information to collect, and possibly help to get a fix from Xrender.


Side note: documentation from Intel says that the video BIOS (aka VBIOS) is sometimes responsible for the corruption of graphics, however for most users the only way this can be updated is by a system BIOS update, which I know in my case is not available.
http://www.intel.com/support/graphics/sb/CS-029985.htm
I am looking into a if it is possible to apply a VBIOS update e.g. using MEMDISK (from the SYSLINUX project) while in Grub2 (before booting Linux).
Comment 1 Chris Wilson 2014-05-24 06:30:42 UTC 
*** Bug 79166 has been marked as a duplicate of this bug. ***
Comment 2 Chris Wilson 2014-05-24 06:31:26 UTC 
Most important is your Xorg.0.log so that we identify driver versions and likely known bugs.
Comment 3 Christopher Chavez 2014-05-24 07:01:59 UTC 
Sure, I will get the Xorg.0.log later today, I know however that a couple other users with this particular issue are using the 852GM/855GM with "driverVersion": "1.3 Mesa 10.1.0".
Comment 4 Götz 2014-05-24 14:35:47 UTC 
Created attachment 99710 [details]
Xorg.0.log for i865G

Thanks Christopher for opening this report.

Chris, I'm one of the Firefox i865G users affected by this bug (xf86-video-intel 2.99.911). 
I have noticed that when I set UXA (or none) as acceleration method, Firefox renders the text correctly. And (using SNA) when setting gfx.xrender.enabled to false in Firefox, the bug goes away.
Comment 5 Christopher Chavez 2014-05-24 15:33:23 UTC 
Created attachment 99716 [details]
another Xorg.0.log for i865G

Comparing with Götz', I am obviously not on the latest, so I will check out the xorg ppa's and see what happens.
Comment 6 Christopher Chavez 2014-05-24 16:00:29 UTC 
Created attachment 99719 [details]
working, new Xorg.0.log

I have updated to the ppa:xorg-edgers/ppa on launchpad and the issue is no longer present. This bug can be closed.
Comment 7 Chris Wilson 2014-05-24 18:23:13 UTC 
This is either bug 77201 or bug 75818.
.

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