Comment 12 for bug 305394

This is on Ubuntu Intrepid (the upcoming 8.10), with fontconfig 2.6.0.
No user specified font config, no KDE.

$ grep -l rgba /etc/fonts/* /etc/fonts/conf.d/* ~/.fonts.conf | xargs ls -l
lrwxrwxrwx 1 root root 42 2008-09-20 16:35 /etc/fonts/conf.d/10-no-sub-pixel.conf -> /etc/fonts/conf.avail/10-no-sub-pixel.conf
-rw-r--r-- 1 root root 257 2006-09-15 19:21 /etc/fonts/conf.d/no-sub-pixel.conf
-rw-r--r-- 1 root root 256 2006-09-15 19:21 /etc/fonts/conf.d/sub-pixel.conf

hm, this is strange.

$ cat /etc/fonts/conf.d/no-sub-pixel.conf
<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!-- conf.d/sub-pixel.conf -->
<fontconfig>
<!-- Enable sub-pixel rendering -->
  <match target="font">
    <edit name="rgba" mode="assign"><const>none</const></edit>
  </match>
</fontconfig>

$ cat /etc/fonts/conf.d/sub-pixel.conf
<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!-- conf.d/sub-pixel.conf -->
<fontconfig>
<!-- Enable sub-pixel rendering -->
  <match target="font">
    <edit name="rgba" mode="assign"><const>rgb</const></edit>
  </match>
</fontconfig>

$ cat /etc/fonts/conf.d/10-no-sub-pixel.conf
<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
<!-- Enable sub-pixel rendering -->
  <match target="font">
    <edit name="rgba" mode="assign"><const>none</const></edit>
  </match>
</fontconfig>