The problem is easily solved by uninstalling the package overlay-scrollbars. It does not seem to handle the case well in which there is very little room for a scrollbar or something like that. Running wireshark from the console yields messages like: (wireshark:3889): Gtk-CRITICAL **: gtk_range_get_adjustment: assertion 'GTK_IS_RANGE (range)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkOrientable' (wireshark:3889): Gtk-CRITICAL **: gtk_orientable_get_orientation: assertion 'GTK_IS_ORIENTABLE (orientable)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkScrollbar' (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkWidget' (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject' (wireshark:3889): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion 'G_IS_OBJECT (object)' failed (wireshark:3889): Gtk-CRITICAL **: gtk_widget_set_name: assertion 'GTK_IS_WIDGET (widget)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject' (wireshark:3889): GLib-GObject-CRITICAL **: g_object_set_qdata_full: assertion 'G_IS_OBJECT (object)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkRange' (wireshark:3889): Gtk-CRITICAL **: gtk_range_get_adjustment: assertion 'GTK_IS_RANGE (range)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkOrientable' (wireshark:3889): Gtk-CRITICAL **: gtk_orientable_get_orientation: assertion 'GTK_IS_ORIENTABLE (orientable)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkScrollbar' (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkWidget' (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject' (wireshark:3889): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion 'G_IS_OBJECT (object)' failed (wireshark:3889): Gtk-CRITICAL **: gtk_widget_set_name: assertion 'GTK_IS_WIDGET (widget)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject' (wireshark:3889): GLib-GObject-CRITICAL **: g_object_set_qdata_full: assertion 'G_IS_OBJECT (object)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkRange' (wireshark:3889): Gtk-CRITICAL **: gtk_range_get_adjustment: assertion 'GTK_IS_RANGE (range)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkOrientable' (wireshark:3889): Gtk-CRITICAL **: gtk_orientable_get_orientation: assertion 'GTK_IS_ORIENTABLE (orientable)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkScrollbar' (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkWidget' (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject' (wireshark:3889): GLib-GObject-CRITICAL **: g_object_get_qdata: assertion 'G_IS_OBJECT (object)' failed (wireshark:3889): Gtk-CRITICAL **: gtk_widget_set_name: assertion 'GTK_IS_WIDGET (widget)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GObject' (wireshark:3889): GLib-GObject-CRITICAL **: g_object_set_qdata_full: assertion 'G_IS_OBJECT (object)' failed (wireshark:3889): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkRange' (wireshark:3889): Gtk-CRITICAL **: gtk_range_get_adjustment: assertion 'GTK_IS_RANGE (range)' failed These messages go on and on. Running wireshark in gdb and pressing CTRL-C when wireshark stops responding and before it actually crashes yields the following: Program received signal SIGINT, Interrupt. 0x00007ffff12c535d in write () at ../sysdeps/unix/syscall-template.S:81 81 ../sysdeps/unix/syscall-template.S: No such file or directory. (gdb) bt #0 0x00007ffff12c535d in write () at ../sysdeps/unix/syscall-template.S:81 #1 0x00007ffff1a41d90 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #2 0x00007ffff1a425ce in g_log_default_handler () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #3 0x00007ffff1a42ae1 in g_logv () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #4 0x00007ffff1a42d72 in g_log () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #5 0x00007fffe8906ebf in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #6 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #7 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #8 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #9 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #10 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #11 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #12 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #13 0x00007fffe8907005 in ?? () ---Type to continue, or q to quit--- from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #14 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #15 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #16 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #17 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #18 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #19 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #20 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #21 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #22 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #23 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #24 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so ---Type to continue, or q to quit--- #25 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #26 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #27 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #28 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #29 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #30 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #31 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #32 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #33 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #34 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #35 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #36 0x00007fffe8907116 in ?? () ---Type to continue, or q to quit--- from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #37 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #38 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #39 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #40 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #41 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #42 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #43 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #44 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #45 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #46 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #47 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so ---Type to continue, or q to quit--- #48 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #49 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #50 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #51 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #52 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #53 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #54 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #55 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #56 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #57 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #58 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #59 0x00007fffe8907005 in ?? () ---Type to continue, or q to quit--- from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #60 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #61 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #62 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #63 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #64 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #65 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #66 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #67 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #68 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #69 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #70 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so ---Type to continue, or q to quit--- #71 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #72 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #73 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #74 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #75 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #76 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #77 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #78 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #79 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #80 0x00007fffe8907116 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so #81 0x00007fffe8907005 in ?? () from /usr/lib/x86_64-linux-gnu/gtk-3.0/modules/liboverlay-scrollbar.so And so on, and so on. The stack depth was at least 1200 in my case, after which I stopped looking. As stated, removing overlay-scrollbars solved the problem for me.