Overlay scrollbars don't work in Emacs

[Andrea Cimitan]

If you disable the blacklisted emacs in overlay scrollbars, you'll see how they are not working. If you grab them, you can't scroll the page (but the thumb moves)

[Anna Glasgall (aglasgall)]

Overlay scrollbars still break in the same fashion in emacs development snapshots and, considering that the release of 24 is nigh, presumably will in 24 as well. I've attached a patch adding emacs-snapshot{-gtk} and emacs24 to the blacklist.

[Ogilvierothchild (ogilvierothchild)]

More discussion here http://bugs.freepascal.org/view.php?id=19266, eg

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The overlay scroll bars are the culprit. Ubuntu is maintaining a blacklist of applications that don't work with these new, IMO ugly, scroll bars. On an almost daily basis apps are added to the blacklist. Examples: https://bugs.launchpad.net/ubuntu/natty/+source/overlay-scrollbar/+bug/770304, [^] https://launchpad.net/ubuntu/natty/+source/overlay-scrollbar/+changelog, [^] etc. The blacklist is apparently not a simple file that can be edited.

To disable the overlay scroll bars for all applications(from terminal):
sudo su
echo "export LIBOVERLAY_SCROLLBAR=0" >> /etc/X11/Xsession.d/80overlayscrollbars

Log out and you are back to the old scroll bars.

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This is ubuntu unity + liboverlay problem not fixable by us. export LIBOVERLAY_SCROLLBAR=0 is solution.

[Valery Ushakov (v-ushakov)]

FWIW, this is still an issue with Ubuntu 18.04 and emacs 25.2.2