[ilk] Font and screen corruption in GTK+ applications
Submitted by Tristan Miller
Assigned to Chris Wilson
After running my system for some time (several hours or days), certain text characters in GTK+ applications become blank or garbled. This renders these applications completely unusable until I restart. (See the attached screenshots.) Qt applications are unaffected.
I'm not sure if this is related, but in addition to the font corruption, sometimes I get black boxes or black streaking over non-text elements of GTK+ applications.
It's not clear to me what the cause of the problem is. There's a Debian bug report at https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=760435 which suggests that the problem is in libglib. However, there are also several freedesktop.org bug reports for the Intel video driver which describe similar symptoms. In particular, my font corruption looks just like Attachment 35720 of Bug 28151 and Attachment 37173 of Bug 20560. I think it's more likely a problem with the Intel driver than with libglib, since I didn't notice any problems after my last update to libglib (from 2.38.2 to 2.42.0 on 3 December 2014) but I did start enountering this problem after migrating my OS from a system with an Nvidia card to one with a Core Processor Integrated Graphics Controller.
I am running KDE 4.14.3 on openSUSE 13.2 for x86-64. I am using xorg 7.6 and version 2.99.916 of the i915 driver. My graphics card is a Elsewhere on the web this problem has been reported on ArchLinux and Kubuntu: https://bbs.archlinux.org/viewtopic.php?id=186783 I have reported the problem downstream on the openSUSE bug tracker: https://bugzilla.novell.com/show_bug.cgi?id=913425