Comment # 3 on bug 1039792 from Peter Geerds

A compositing manager is running (kde, gnome ...).
ardesia -V (verbose mode)
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
Enabled Device in screen 2. 0x1252800: "Virtual core pointer" (Type: 0)
DEBUG: Annotation window get screen-changed event
DEBUG: Annotation window get configure event (1366,768)
Clear screen
The save point
/tmp/ardesia/ardesia_project_2017-21-5_16:39:42/images/ardesia_1_vellum.png has
been stored in file
Acquire grab
The pen with colour FF0000FF has been selected
The pen with colour FF0000FF has been selected
The pen with colour FF0000FF has been selected
DEBUG: Annotation window get expose event
Restore surface
The save-point
/tmp/ardesia/ardesia_project_2017-21-5_16:39:42/images/ardesia_1_vellum.png has
been loaded from file
DEBUG: Annotation window get configure event (1366,768)
Device 'Virtual core pointer': Button 1 Down at (x,y)= (663,566223 :
364,471497)
Select colour FF0000FF
Device 'Virtual core pointer': Button 1 Up at (x,y)= (663,57 : 364,47)
The save point
/tmp/ardesia/ardesia_project_2017-21-5_16:39:42/images/ardesia_2_vellum.png has
been stored in file
Device 'Virtual core pointer': Button 1 Down at (x,y)= (663,566223 :
364,471497)
Select colour FF0000FF
Select colour FF0000FF
Select colour FF0000FF
Select colour FF0000FF
...