dogtail-devel [Bug 429347] New: Dogtail's utils.screenshot() not working properly on exported display

["dogtail (bugzilla.gnome.org)" <bugzilla-daemon bugzilla gnome org>]

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  dogtail | Framework | Ver: 0.6.1
           Summary: Dogtail's utils.screenshot() not working properly on
                    exported display
           Product: dogtail
           Version: 0.6.1
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: major
          Priority: Normal
         Component: Framework
        AssignedTo: dogtail-maint gnome bugs
        ReportedBy: atodorov redhat com
         QAContact: dogtail-maint gnome bugs
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Please describe the problem:
When an application is running on the same host but is shown on another display
using Dogtail's utils.screenshot() function produces pure black images.
However using other procedural API (e.g. click("Next")) is working fine.

Steps to reproduce:
1. Start a second GNOME session on the same machine.
2. $ export DISPLAY=:0   ## we are running at :1.0
3. $ python
Python 2.4.3 (#1, Dec 11 2006, 11:39:03) 
[GCC 4.1.1 20061130 (Red Hat 4.1.1-43)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> from dogtail.utils import *
Creating logfile at /tmp/dogtail/logs/log_20070413-151513_debug ...
>>> screenshot()
GTK Accessibility Module initialized
Screenshot taken: /tmp/dogtail/screenshot_20070413-151517.png
'/tmp/dogtail/screenshot_20070413-151517.png'
>>> Ctrl+D
4. Open the image with EOG. It is black.

Actual results:
The produced screenshot is pure black color.

Expected results:
The produced screenshot must show the applications visible on user's desktop.

Does this happen every time?
yes

Other information:


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