<AWT Dev> [9] Review request for 8081371: [PIT] Test closed/java/awt/FullScreen/DisplayMode/CycleDMImage.java switches Linux to the single device mode

[Alexander Zvegintsev]

Hello,

please review the fix
http://cr.openjdk.java.net/~azvegint/jdk/9/8081371/00/
for the issue
https://bugs.openjdk.java.net/browse/JDK-8081371

As known we are currently return a wrong list of display modes in multi 
screen environment[0].
Apparently the recent fullscreen mode fix[1] enables setDisplayMode() in 
such case. As result user gets an unwanted result.
This fix disables display mode change support for multi screen cases but 
keeps exclusive fullscreen support enabled.

[0] https://bugs.openjdk.java.net/browse/JDK-8022810 Cannot list all the 
available display modes on Ubuntu linux in case of two screen devices
[1] https://bugs.openjdk.java.net/browse/JDK-8051617 Fullscreen mode is 
not working properly on Xorg

-- 
Thanks,

Alexander.