https://bugzilla.redhat.com/show_bug.cgi?id=1197661
--- Comment #9 from Fredy Neeser <nfd(a)zurich.ibm.com> ---
Further testing shows that the Eclipse editor window corruption/smudging after
scrolling occurs only if I have both my laptop screen and an external monitor
screen enabled, configured as adjacent screens in the KDE Display
Configuration. In this configuration, the problem is present regardless of
whether Eclipse is placed on the laptop or external screen. Note that the
external monitor is supported via the nouveau driver -- it's a Lenovo W530
laptop with integrated Intel + discrete Nvidia graphics ("Optimus" technology).
The problem does NOT occur if I disable the external monitor and work on the
laptop screen only.
Note also that Eclipse LUNA (with GKT2) on Fedora 21 (on a different system)
works fine, but that system has a single monitor and uses Intel graphics only.
Any ideas how to narrow down this issue are much appreciated :-)
How to reproduce
----------------
The smudging on scroll problem can be reproduced easily by first minimizing and
then un-minimizing the Eclipse application. Next, move a scrollbar vertically
or horizontally, scroll via the mouse wheel, or click a scroll up/down arrow
within the editor window, and only some parts of the editor window are updated,
leaving it in a corrupted state until I click the background or another window.
- Note that this occurs *only* with the Eclipse editor window.
Scrolling works as usual with the Eclipse project explorer window.
Also, scrolling works fine in native KDE apps and in Firefox.
- Problem is present regardless of whether I use Clearlooks or Adwaita
as my theme for GTK2 in
KDE Desktop Settings > Application Style > GNOME Application Style
- Same problem with Eclipse LUNA SR1a (4.4.1) and Eclipse LUNA SR2 (4.4.2)
Configuration notes
-------------------
KDE Plasma 5.3.2
Qt 5.4.2
$ uname -r
4.1.3-201.fc22.x86_64
$ cat /etc/eclipse.ini | grep launcher.GTK -A1
--launcher.GTK_version
2
$ rpm -qa | egrep -i "^eclipse" | egrep -i "platform|swt"
eclipse-swt-4.4.2-6.fc22.x86_64
eclipse-platform-4.4.2-6.fc22.x86_64
$ rpm -qa | egrep -i "^gtk2"
gtk2-engines-2.20.2-9.fc22.x86_64
gtk2-2.24.28-1.fc22.x86_64
gtk2-devel-2.24.28-1.fc22.x86_64
gtk2-2.24.28-1.fc22.i686
(Uninstalling gtk2-devel and gtk2-engines, as well as reinstalling gtk2 made no
difference).
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