Package: gnome-screenshot Version: 3.16.2-1 Severity: important Tags: patch upstream
gnome-screenshot runs into an endlees loop when capturing a fullscreen picture. This may be related to a similar bug in reported for GTK 3.8 described here: https://bugzilla.gnome.org/show_bug.cgi?id=695132 Apparently, this happens especially in scenarios when a compositing window manager like compiz, unity, or gnome-shell, changes opacity settings during the "fade effect" of gnome-screenshot, so the final opacity setting of (default) 0.1, that is checked for in src/cheese-flash.c, is never reached. A possible solution could be completely removing the "flash" effect timer loop. Instead of this, in the patch attached, the final opacity setting has just been increased to 0.05, which keeps the visual effect working, but seems to be high enough to circumvent the iopacity setting rounding effect that triggers the inifinite loop. -- System Information: Debian Release: 8.2 APT prefers stable APT policy: (990, 'stable'), (500, 'stable-updates'), (500, 'unstable'), (500, 'testing'), (1, 'experimental') Architecture: i386 (x86_64) Kernel: Linux 4.2.0-64 (SMP w/2 CPU cores; PREEMPT) Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages gnome-screenshot depends on: ii dconf-gsettings-backend 0.22.0-1 simple configuration storage syste ii libc6 2.19-20 GNU C Library: Shared libraries ii libcairo2 1.14.2-2 Cairo 2D vector graphics library ii libcanberra-gtk3-0 0.30-2.1 GTK+ 3.0 helper for playing widget ii libcanberra0 0.30-2.1 simple abstract interface for play ii libgdk-pixbuf2.0-0 2.31.1-2+deb8u2 GDK Pixbuf library ii libglib2.0-0 2.44.1-1.1 GLib library of C routines ii libgtk-3-0 3.16.6-1 GTK+ graphical user interface libr ii libx11-6 2:1.6.3-1 X11 client-side library ii libxext6 2:1.3.3-1 X11 miscellaneous extension librar gnome-screenshot recommends no packages. gnome-screenshot suggests no packages. -- no debconf information
Description: Increase FLASH_LOW_THRESHOLD to avoid loop-forever --- gnome-screenshot-3.16.2.orig/src/cheese-flash.c +++ gnome-screenshot-3.16.2/src/cheese-flash.c @@ -44,7 +44,7 @@ #define FLASH_ANIMATION_RATE 120 /* When to consider the flash finished so we can stop fading */ -#define FLASH_LOW_THRESHOLD 0.01 +#define FLASH_LOW_THRESHOLD 0.05 G_DEFINE_TYPE (CheeseFlash, cheese_flash, G_TYPE_OBJECT);
