Font glyphs do not render correctly in some applications after suspend

[Ethan Blanton]

After suspend/resume of my laptop, some applications do not reliably render Xft fonts, leaving the areas where such fonts should be rendered entirely blank. Both rxvt-unicode and awesome show this problem. Installed versions of these packages are rxvt-unicode 9.21-1build1 and awesome 3.5.6-1build1.

Other applications (VMware 11, not an Ubuntu package) render fonts, but with corruption -- I believe this to be related but cannot be sure.

This appears to be the same bug as Freedesktop.org bug 88584 (https://bugs.freedesktop.org/show_bug.cgi?id=88584) and OpenSUSE bug 913425 (https://bugzilla.novell.com/show_bug.cgi?id=913425). In particular, a workaround named on those bugs (setting COGL_ATLAS_DEFAULT_BLIT_MODE=framebuffer in /etc/environment) appears to correct the problem here.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.39-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
Date: Sun May 8 14:39:02 2016
InstallationDate: Installed on 2015-06-04 (338 days ago)
InstallationMedia: Lubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to xenial on 2016-04-22 (16 days ago)

[Ethan Blanton (eblanton)]

The COGL_ATLAS_DEFAULT_BLIT_MODE workaround was not permanent. After a good long sleep (several hours), fonts are no longer rendering in awesome.