522046 - [ubuntu] Firefox fails to render with antialiasing correctly

Status: UNCONFIRMED

(Core :: Graphics, defect)

Description

[Teej]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-GB; rv:1.9.0.14) Gecko/2009090216 Ubuntu/9.04 (jaunty) Firefox/3.0.14
Build Identifier: 

In firefox 3.5.3 on Ubuntu 9.04 and 9.10 development beta, certain fonts are rendered incorrectly, with blue/red edges, i.e. subpixel antialiased rendering is blurred. This does not appear in any other applications with the same font, except OpenOffice. 

The bug is being tracked at Launchpad at https://bugs.launchpad.net/ubuntu/+source/firefox-3.5/+bug/67226 where more debugging information is present.

Reproducible: Always

Comment 1

[Teej]

From Launchpad bug report:

"After reading all the replies I came up with a solution that works, in my case, and based on the suggestion by Jean-Philippe Fleury:

My /.fonts.conf looked like this:

<?xml version='1.0'?>
<!DOCTYPE fontconfig SYSTEM 'fonts.dtd'>
<fontconfig>
    <match target="font" >
        <edit mode="assign" name="rgba" >
            <const>none</const>
        </edit>
    </match>
    <match target="font" >
        <edit mode="assign" name="hinting" >
            <bool>true</bool>
        </edit>
    </match>
    <match target="font" >
        <edit mode="assign" name="hintstyle" >
            <const>hintfull</const>
        </edit>
    </match>
    <match target="font" >
        <edit mode="assign" name="antialias" >
            <bool>true</bool>
        </edit>
    </match>
    <dir>/home/jack/.fontmatrix</dir>
</fontconfig>

After deleting:

    <match target="font" >
        <edit mode="assign" name="hintstyle" >
            <const>hintfull</const>
        </edit>
    </match>

everything seems to be fixed."

Comment 2

[Teej]

Note: Firefox still does not respect the original settings.

Comment 3

[Teej]

From bug report:
"I noticed that in /etc/fonts/conf.d there were the following links:

10-antialias.conf
10-hinting.conf
10-hinting-full.conf
10-hinting-slight.conf
11-lcd-filter-lcddefault.conf

Removing 10-hinting-slight.conf and adding 10-sub-pixel-rgb.conf worked for me."

Don't know if this helps locate the problem?

Comment 4

[Marcin Wisniowski]

I can confirm the above tip worked for me:
Ubuntu 9.10 x86 | NVIDIA GeForce 7300 LE