As Moritz, I still get the missing characters in Trusty with following packages and SNA enabled:
$ uname -a Linux [snip] 3.16.0-37-generic #51~14.04.1-Ubuntu SMP Wed May 6 15:23:14 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux $ dpkg -l | grep video-intel | grep ii ii xserver-xorg-video-intel-lts-utopic 2:2.99.914-1~exp1ubuntu4.3~trusty1 amd64 X.Org X server -- Intel i8xx, i9xx display driver @timo: Does your kernel packages differ from .51? -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/1432194 Title: Graphics unstable on Ubuntu 14.04 and 14.10 using Intel HD Graphics 5500 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1432194/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp