[Bug 18448] Wine does not support X primary selections

http://bugs.winehq.org/show_bug.cgi?id=18448

--- Comment #5 from Dmitry Timoshkov   2009-05-12 22:35:18 ---
> From dlls/winex11.drv/clipboard.c:

*    Wine's internal clipboard is exposed to external apps via the X
 *    selection mechanism.
 *    Currently the driver asserts ownership via two selection atoms:
 *    1. PRIMARY(XA_PRIMARY)
 *    2. CLIPBOARD
 *
 *    In our implementation, the CLIPBOARD selection takes precedence over
PRIMARY,
 *    i.e. if a CLIPBOARD selection is available, it is used instead of
PRIMARY.

So it's an intentional choice. And as  Vitaliy said there is a registry key
(UsePrimarySelection) which changes the behaviour.