[Konsole-devel] [konsole] [Bug 365622] New: konsole uses 100% cpu since the upgrade of freetype to 2.6.5

Timo Gurr via KDE Bugzilla bugzilla_noreply at kde.org
Wed Jul 13 16:26:45 UTC 2016


            Bug ID: 365622
           Summary: konsole uses 100% cpu since the upgrade of freetype to
           Product: konsole
           Version: 16.04.2
          Platform: Exherbo Packages
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
          Assignee: konsole-devel at kde.org
          Reporter: timo.gurr at gmail.com

The latest freetype release offers new subpixel hinting options:


When freetype 2.6.5 is compiled with "TT_CONFIG_OPTION_SUBPIXEL_HINTING  2"
which according the the information in the freetype commit is the new default
mode, then konsole is lagging and utilizing 100% CPU usage when switching tabs
or redrawing the screen, e.g. when opening/closing a file in vi, showing a git
diff --cached and so on.

Why I'm reporting this here and not on the freetype bugtracker is because
everything else seems to work fine, it's only konsole showing that extreme CPU
usage and lag. Attaching a screenshot of ksysguard showing the intense CPU
usage causing lags and delays when trying to work with konsole.

Reproducible: Always

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