Version: (using KDE 4.4.2) OS: Linux Installed from: Ubuntu Packages The Antialiasing settings in System Settings-> Appearance -> Fonts occasionally can cause font corruption, depending on the settings. It occurs randomly, only for that particular character on that screen. By character, I mean that for example, all "Y"s that are in the application are corrupted. This occurs if the antialiasing settings are set to "enbled" and with the following combinations of settings SubPixel Rendering: RGB | Hinting Style: None SubPixel Rendering: RGB | Hinting Style: Slight SubPixel Rendering: RGB | Hinting Style: Medium SubPixel Rendering: RGB | Hinting Style: Full SubPixel Rendering: Disabled | Hinting Style: Medium SubPixel Rendering: Disabled | Hinting Style: Full and does not occur with SubPixel Rendering: Disabled | Hinting Style: None SubPixel Rendering: Disabled | Hinting Style: Slight Ive taken a screenshot, so please take a look -> http://img52.imageshack.us/img52/7463/snapshot1x.png
It is definately not a kwin bug (not responsible for window content) and I doubt it is a KDE bug, but for that I have some questions: * Does it happen with other applications than Synaptics? * Does it only happen for applications using GTK+ (as Synaptics is a GTK+ application)? * Does it happen for applications not run as system user (as Synaptics is run as root and should use it's own font settings)? * Does changing the fonts settings for GTK+ applications in systemsettings change the behaviour?
if this occurs for one particular combination of font/glyph/hinting it could be a fontconfig bug, otherwise (randomly hits glyphs across all fonts and hintings) it's the glyph cache on the server. for nvidia use "nvidia-settings -a GlyphCache=0" to turn it off, otherwise i don't know. you'll have to gg for your gpu/driver. notce that _not_ caching glyphs makes text rendering slow.
*Yes, this happens for all applications *Nope. Happens for KDE applications as well *Exists for both root & non root users *Ive tried 20+ fonts with no effect.