Observed with linux machine trying to connect to another linux machine with xrdp installed.
[ozgur@ozgur ~]$ rdesktop -u <USERNAME> -p <PASSWORD> <IP>
Connection established using plain RDP.
Clipboard(error): xclip_handle_SelectionNotify(), XGetWindowProperty failed
Clipboard(error): xclip_handle_SelectionNotify(), unable to find a textual target to satisfy RDP clipboard text request
Clipboard(error): xclip_handle_SelectionNotify(), XGetWindowProperty failed
Clipboard(error): xclip_handle_SelectionNotify(), XGetWindowProperty failed
Clipboard(error): xclip_handle_SelectionNotify(), XGetWindowProperty failed
Clipboard(error): xclip_handle_SelectionNotify(), XGetWindowProperty failed
Clipboard(error): xclip_handle_SelectionNotify(), XGetWindowProperty failed
Clipboard(error): xclip_handle_SelectionNotify(), XGetWindowProperty failed
Clipboard(error): xclip_handle_SelectionNotify(), XGetWindowProperty failed
X Error of failed request: BadAtom (invalid Atom parameter)
Major opcode of failed request: 17 (X_GetAtomName)
Atom id in failed request: 0x6374652f
Serial number of failed request: 2797
Current serial number in output stream: 2797
since the protocol is carried over ssh, we need to edit ssh_config and sshd_config of the host and going machine. (This is happening because you are forwarding the X session over ssh. Make sure you have)
ForwardX11Trusted yes
ForwardX11 yes
rdesktop -g 90% <server_ip>
or
rdesktop -g 1280x1024 <server_ip>
rdesktop/rdesktop#251 try this