Problem mit Enigmail/GnuPG

Send operation aborted.


Error - encryption command failed


gpg command line and output:
/usr/bin/gpg
gpg: can't connect to the agent - trying fall back
No protocol specified
xprop:  unable to open display ':982.0'
usage:  xprop [-options ...] [[format [dformat]] atom] ...


where options include:
	-grammar                   	print out full grammar for command line
	-display host:dpy          	the X server to contact
	-id id                     	resource id of window to examine
	-name name                 	name of window to examine
	-font name                 	name of font to examine
	-remove propname           	remove a property
	-set propname value        	set a property to a given value
	-root                      	examine the root window
	-len n                     	display at most n bytes of any property
	-notype                    	do not display the type field
	-fs filename               	where to look for formats for properties
	-frame                     	don't ignore window manager frames
	-f propname format [dformat]   formats to use for property of given name
	-spy                       	examine window properties forever


No protocol specified


(pinentry-gtk-2:12487): Gtk-WARNING **: cannot open display: :982.0
gpg-agent[12486]: can't connect to the PIN entry module: End of file
gpg: problem with the agent: End of file
gpg: skipped "<KEY>": General error
gpg: [stdin]: clearsign failed: General error