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I'm running an raspberry pi with a display connected to the hdmi port. With a remote computer I want to view the actual graphic desktop (started with startx) of the pi which one can see on the display.

Is it something with export DISPLAY? But I have no idea about the correct parameters. I have a ssh connection via putty and a RDP connection. But the RDP desktop I see on the remote computer is different from the desktop of the hdmi display.

I appreciate any help. Thanks.

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Have you tried VNC yet? – dtmland Jul 12 '13 at 19:26
X forwarding won't give you the actual desktop being displayed on the Pi's local framebuffer; for that you need VNC. (I'm not sure how you got RDP working, but that's going to give you a separate login session as well, rather than the console's X session.) – Aaron Miller Jul 12 '13 at 20:20
Some desktop systems have a VNC server built in, it just needs activated. KDE has one, memory says Gnome has something similar. – Jeremy J Starcher Jul 13 '13 at 2:26
Yes, VNC! I installed x11vnc - and it works great! – hildwin Jul 14 '13 at 0:58

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