Ubuntu does not have a true "print screen" function as people know it, but a hack; if you hold "print screen" a little dialogue appears to save the screenshot; however you can see it's a hack if you, say, right-click the windowbar to make the list of options (minimize through close) appear, and then try to "print screen": it won't and can't do it. There are other ways to see that Ubuntu's "print screen" implementations is somewhat of a dirty hack, but this is sufficient.
I read on some thread that there is some kind of clipboard functionality in either the gnome or linux code on a dev thread for firefox somewhere (they can't do "copy picture" without that) and supposedly it should be fixed by now (the mozilla team says so, I think) yet those functions are yet to appear in ubuntu...at all: the same stuff preventing a true "print screen". Linux needs a true "clipboard" for true functionality: to actually copy web pics, to actually "print screen" as in "save screen" (which we all know it as), and so on...I was wanting to copy the menu to do a mock-up for a gui suggestion to improve the interface...and can't even use this basic operation to do this!
So it's worth for those who have the ability to check into the status of those features and what they depend on. You can read about the status for the moz team here:
https://bugzilla.mozilla.org/show_bug.cgi?id=234716
and the dependency [which are solved by now...so why isn't this fixed yet!!!?] here:
https://bugzilla.mozilla.org/show_bug.cgi?id=21747
The reason this stuff has been impossible is because the clipboard didn't support images; but if mozilla fixed this...then supposedly is based on the clipboard being fixed, and so many other features (like copying and pasting throughout the system) should also be fixed by now and enabled to use this functionality and not make graphics and document-layout work a pain and waste-of-time on linux anymore!
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