I've not yet tested patch from comment 165 - but with regards to Firefox
and Cairo -  I'm also seeing errors in  i.e. pidgin - where status icons
looks occasionally damaged.

And my rawhide has these related packages:

cairo-1.13.1-0.1.git337ab1f.fc21.x86_64
cairo-gobject-1.13.1-0.1.git337ab1f.fc21.x86_64
pidgin-2.10.7-9.fc21.x86_64
xorg-x11-server-Xorg-1.15.0-1.fc21.x86_64
libX11-1.6.1-1.fc20.x86_64


 ldd /bin/pidgin
        linux-vdso.so.1 =>  (0x00007fff323ad000)
        libX11.so.6 => /lib64/libX11.so.6 (0x00007f6f151af000)
        libXext.so.6 => /lib64/libXext.so.6 (0x00007f6f14f9c000)
        libXss.so.1 => /lib64/libXss.so.1 (0x00007f6f14d98000)
        libSM.so.6 => /lib64/libSM.so.6 (0x00007f6f14b90000)
        libICE.so.6 => /lib64/libICE.so.6 (0x00007f6f14973000)
        libgtkspell.so.0 => /lib64/libgtkspell.so.0 (0x00007f6f1476c000)
        libgtk-x11-2.0.so.0 => /lib64/libgtk-x11-2.0.so.0 (0x00007f6f140e7000)
        libgdk-x11-2.0.so.0 => /lib64/libgdk-x11-2.0.so.0 (0x00007f6f13e25000)
        libpangocairo-1.0.so.0 => /lib64/libpangocairo-1.0.so.0 
(0x00007f6f13c18000)
        libatk-1.0.so.0 => /lib64/libatk-1.0.so.0 (0x00007f6f139f4000)
        libcairo.so.2 => /lib64/libcairo.so.2 (0x00007f6f136ce000)
        libgdk_pixbuf-2.0.so.0 => /lib64/libgdk_pixbuf-2.0.so.0 
(0x00007f6f134aa000)
        libgio-2.0.so.0 => /lib64/libgio-2.0.so.0 (0x00007f6f1312b000)
        libpangoft2-1.0.so.0 => /lib64/libpangoft2-1.0.so.0 (0x00007f6f12f15000)
        libpango-1.0.so.0 => /lib64/libpango-1.0.so.0 (0x00007f6f12cca000)
        libfontconfig.so.1 => /lib64/libfontconfig.so.1 (0x00007f6f12a8e000)
        libfreetype.so.6 => /lib64/libfreetype.so.6 (0x00007f6f127e9000)
        libpurple.so.0 => /lib64/libpurple.so.0 (0x00007f6f124af000)
        libdbus-glib-1.so.2 => /lib64/libdbus-glib-1.so.2 (0x00007f6f12287000)
        libdbus-1.so.3 => /lib64/libdbus-1.so.3 (0x00007f6f1203e000)
        libfarstream-0.1.so.0 => /lib64/libfarstream-0.1.so.0 
(0x00007f6f11e29000)
        libgstbase-0.10.so.0 => /lib64/libgstbase-0.10.so.0 (0x00007f6f11bd5000)
        libgstinterfaces-0.10.so.0 => /lib64/libgstinterfaces-0.10.so.0 
(0x00007f6f119c2000)
        libgstreamer-0.10.so.0 => /lib64/libgstreamer-0.10.so.0 
(0x00007f6f116d9000)
        libgobject-2.0.so.0 => /lib64/libgobject-2.0.so.0 (0x00007f6f11487000)
        libgmodule-2.0.so.0 => /lib64/libgmodule-2.0.so.0 (0x00007f6f11282000)
        libgthread-2.0.so.0 => /lib64/libgthread-2.0.so.0 (0x00007f6f11080000)
        libglib-2.0.so.0 => /lib64/libglib-2.0.so.0 (0x00007f6f10d54000)
        libxml2.so.2 => /lib64/libxml2.so.2 (0x00007f6f109ea000)
        libidn.so.11 => /lib64/libidn.so.11 (0x00007f6f107b7000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f6f104b1000)
        libnsl.so.1 => /lib64/libnsl.so.1 (0x00007f6f10296000)
        libresolv.so.2 => /lib64/libresolv.so.2 (0x00007f6f1007b000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f6f0fe5d000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f6f0fa95000)
        libxcb.so.1 => /lib64/libxcb.so.1 (0x00007f6f0f874000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f6f0f670000)
        libuuid.so.1 => /lib64/libuuid.so.1 (0x00007f6f0f46a000)
        libenchant.so.1 => /lib64/libenchant.so.1 (0x00007f6f0f25e000)
        libXfixes.so.3 => /lib64/libXfixes.so.3 (0x00007f6f0f058000)
        libXrender.so.1 => /lib64/libXrender.so.1 (0x00007f6f0ee4d000)
        libXinerama.so.1 => /lib64/libXinerama.so.1 (0x00007f6f0ec4a000)
        libXi.so.6 => /lib64/libXi.so.6 (0x00007f6f0ea3a000)
        libXrandr.so.2 => /lib64/libXrandr.so.2 (0x00007f6f0e82f000)
        libXcursor.so.1 => /lib64/libXcursor.so.1 (0x00007f6f0e624000)
        libXcomposite.so.1 => /lib64/libXcomposite.so.1 (0x00007f6f0e421000)
        libXdamage.so.1 => /lib64/libXdamage.so.1 (0x00007f6f0e21d000)
        libharfbuzz.so.0 => /lib64/libharfbuzz.so.0 (0x00007f6f0dfc8000)
        libpixman-1.so.0 => /lib64/libpixman-1.so.0 (0x00007f6f0dd1a000)
        libEGL.so.1 => /lib64/libEGL.so.1 (0x00007f6f0daf7000)
        libpng16.so.16 => /lib64/libpng16.so.16 (0x00007f6f0d8c4000)
        libxcb-shm.so.0 => /lib64/libxcb-shm.so.0 (0x00007f6f0d6c0000)
        libxcb-render.so.0 => /lib64/libxcb-render.so.0 (0x00007f6f0d4b6000)
        libz.so.1 => /lib64/libz.so.1 (0x00007f6f0d2a0000)
        libGL.so.1 => /lib64/libGL.so.1 (0x00007f6f0d037000)
        librt.so.1 => /lib64/librt.so.1 (0x00007f6f0ce2f000)
        libffi.so.6 => /lib64/libffi.so.6 (0x00007f6f0cc26000)
        libselinux.so.1 => /lib64/libselinux.so.1 (0x00007f6f0ca02000)
        libexpat.so.1 => /lib64/libexpat.so.1 (0x00007f6f0c7d7000)
        liblzma.so.5 => /lib64/liblzma.so.5 (0x00007f6f0c5b2000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f6f15521000)
        libXau.so.6 => /lib64/libXau.so.6 (0x00007f6f0c3ad000)
        libgraphite2.so.3 => /lib64/libgraphite2.so.3 (0x00007f6f0c191000)
        libX11-xcb.so.1 => /lib64/libX11-xcb.so.1 (0x00007f6f0bf8e000)
        libxcb-dri2.so.0 => /lib64/libxcb-dri2.so.0 (0x00007f6f0bd89000)
        libxcb-xfixes.so.0 => /lib64/libxcb-xfixes.so.0 (0x00007f6f0bb82000)
        libxcb-shape.so.0 => /lib64/libxcb-shape.so.0 (0x00007f6f0b97d000)
        libgbm.so.1 => /lib64/libgbm.so.1 (0x00007f6f0b775000)
        libwayland-client.so.0 => /lib64/libwayland-client.so.0 
(0x00007f6f0b567000)
        libwayland-server.so.0 => /lib64/libwayland-server.so.0 
(0x00007f6f0b355000)
        libglapi.so.0 => /lib64/libglapi.so.0 (0x00007f6f0b12e000)
        libudev.so.1 => /lib64/libudev.so.1 (0x00007f6f0af1c000)
        libdrm.so.2 => /home/kabi/soft/glx-test/lib/libdrm.so.2 
(0x00007f6f0ad0f000)
        libxcb-glx.so.0 => /lib64/libxcb-glx.so.0 (0x00007f6f0aaf5000)
        libXxf86vm.so.1 => /lib64/libXxf86vm.so.1 (0x00007f6f0a8ee000)
        libpcre.so.1 => /lib64/libpcre.so.1 (0x00007f6f0a687000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f6f0a470000)


So while the Firefox is the easiest one to see those errors (it's always enough 
to play for a while with some input box), it's probably not tied with its 
built-in version of Cairo library.

-- 
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/1098334

Title:
  [gen4 sna] Font corruption

Status in X.org xf86-video-intel:
  In Progress
Status in “xserver-xorg-video-intel” package in Ubuntu:
  Incomplete

Bug description:
  After enabling the SNA acceleration method and rebooting, I noticed
  that graphical glitches appeared in the letters on Chromium's tab bar
  during the mouse hover animation. I've attached a screenshot
  illustrating this, particularly with the letter "g" in the screenshot.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: xorg 1:7.7+1ubuntu4
  ProcVersionSignature: Ubuntu 3.7.0-7.15-generic 3.7.0
  Uname: Linux 3.7.0-7-generic x86_64
  ApportVersion: 2.8-0ubuntu1
  Architecture: amd64
  Date: Thu Jan 10 16:00:55 2013
  InstallationDate: Installed on 2012-09-24 (107 days ago)
  InstallationMedia: Kubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120822.2)
  MarkForUpload: True
  SourcePackage: xorg
  UpgradeStatus: Upgraded to raring on 2012-09-25 (107 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1098334/+subscriptions

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