I tested with upstream source of gimp-2.8.18.tar.bz2 [https://download.gimp.org/mirror/pub/gimp/v2.8/]. It is specifically compiled against gegl-0.2.
Ubuntu 16.04 has gegl-0.3 (and not gegl-0.2). Debian and Ubuntu both use bump_Babl-GEGL_versions.patch: -PKG_CHECK_MODULES(GEGL, gegl-0.2 >= gegl_required_version) +PKG_CHECK_MODULES(GEGL, gegl-0.3 >= gegl_required_version) I made this modification and compiled upstream gimp-2.8.18.tar.bz2. And encountered same startup warnings. --- I installed gegl-0.2 (runtime+devel) from Ubuntu-14.04 (It needs also these old packages: libopenexr6 libilmbase6 libumfpack5.6.2 libamd2.3.1 libcholmod2.1.2 libcamd2.3.1 libccolamd2.8.0 libcolamd2.8.0). Then I compiled Ubuntu-16.04's version of gimp, gimp-2.8.16-1ubuntu1 against gegl-0.2 (dropping gegl-part of bump_Babl-GEGL_versions.patch and tuning debian/control). Now this gimp does NOT have these warnings. So the base reason for these gegl-warnings seems to be too new gegl. (Or some of those other dependency libraries). --- bump_Babl-GEGL_versions.patch seems to relate this debian bugreport: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=790421 (migrating from gegl-0.2 to gegl-0.3). ** Bug watch added: Debian Bug tracker #790421 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=790421 -- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to gimp in Ubuntu. Matching subscriptions: Ubuntu Studio Bugs https://bugs.launchpad.net/bugs/1576977 Title: Lots of GEGL-gegl-operation.c-WARNING on starting gimp Status in gimp package in Ubuntu: Confirmed Bug description: Ubuntu 16.04 gimp: 2.8.16-1ubuntu1 rm ~/.gimp-2.8/ LANG=en gimp (gimp:413): GLib-GObject-WARNING **: g_object_set_valist: object class 'GeglConfig' has no property named 'cache-size' (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A3410 from "gimp:point-layer-mode" to "gimp :dissolve-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A39B0 from "gimp:point-layer-mode" to "gimp :behind-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A4090 from "gimp:point-layer-mode" to "gimp :multiply-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A43A0 from "gimp:point-layer-mode" to "gimp :screen-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A4790 from "gimp:point-layer-mode" to "gimp :overlay-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A4BC0 from "gimp:point-layer-mode" to "gimp :difference-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A5800 from "gimp:point-layer-mode" to "gimp :addition-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A5BC0 from "gimp:point-layer-mode" to "gimp :subtract-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A5F80 from "gimp:point-layer-mode" to "gimp :darken-only-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A63D0 from "gimp:point-layer-mode" to "gimp :lighten-only-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A68E0 from "gimp:point-layer-mode" to "gimp:hue- mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A6B40 from "gimp:point-layer-mode" to "gimp :saturation-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A6F70 from "gimp:point-layer-mode" to "gimp:color- mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A73E0 from "gimp:point-layer-mode" to "gimp:value- mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A7760 from "gimp:point-layer-mode" to "gimp :divide-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A7BE0 from "gimp:point-layer-mode" to "gimp:dodge- mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A7F50 from "gimp:point-layer-mode" to "gimp:burn- mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A83A0 from "gimp:point-layer-mode" to "gimp :hardlight-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A8740 from "gimp:point-layer-mode" to "gimp :softlight-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A8B40 from "gimp:point-layer-mode" to "gimp:grain- extract-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A90A0 from "gimp:point-layer-mode" to "gimp:grain- merge-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A93C0 from "gimp:point-layer-mode" to "gimp:color- erase-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20A9730 from "gimp:point-layer-mode" to "gimp:erase- mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20AA080 from "gimp:point-layer-mode" to "gimp :replace-mode" (gimp:413): GEGL-gegl-operation.c-WARNING **: Cannot change name of operation class 0x20AA450 from "gimp:point-layer-mode" to "gimp:anti- erase-mode" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gimp/+bug/1576977/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : ubuntustudio-bugs@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp