https://bugs.kde.org/show_bug.cgi?id=395381
--- Comment #11 from ahc <ali.h.calis...@protonmail.com> ---
Martin is right, it is a Xwayland bug, and nothing to do with kwin or plasma.
I'm able to use plasma-5.13.1 without this issue by setting QT_QPA_PLATFORM to
QT_QPA_PLATFORM=wayland. For time being I've patched plasma-workspace to set
QT_QPA_PLATFORM to wayland, while I'm waiting for the Xwayland bug to be fixed.
Here is the patch:
--- a/shell/main.cpp 2018-06-21 19:32:15.233320641 +0200
+++ b/shell/main.cpp 2018-06-21 19:32:57.733320349 +0200
@@ -63,13 +63,8 @@
QQuickWindow::setDefaultAlphaBuffer(true);
- const bool qpaVariable = qEnvironmentVariableIsSet("QT_QPA_PLATFORM");
KWorkSpace::detectPlatform(argc, argv);
QApplication app(argc, argv);
- if (!qpaVariable) {
- // don't leak the env variable to processes we start
- qunsetenv("QT_QPA_PLATFORM");
- }
KLocalizedString::setApplicationDomain("plasmashell");
// The executable's path is added to the library/plugin paths.
--- a/krunner/main.cpp 2018-06-21 19:35:05.889986144 +0200
+++ b/krunner/main.cpp 2018-06-21 19:35:40.136652576 +0200
@@ -44,14 +44,9 @@
qunsetenv("QT_DEVICE_PIXEL_RATIO");
QCoreApplication::setAttribute(Qt::AA_DisableHighDpiScaling);
- const bool qpaVariable = qEnvironmentVariableIsSet("QT_QPA_PLATFORM");
KWorkSpace::detectPlatform(argc, argv);
QQuickWindow::setDefaultAlphaBuffer(true);
QApplication app(argc, argv);
- if (!qpaVariable) {
- // don't leak the env variable to processes we start
- qunsetenv("QT_QPA_PLATFORM");
- }
KLocalizedString::setApplicationDomain("krunner");
KQuickAddons::QtQuickSettings::init();
--- a/startkde/startplasmacompositor.cmake 2018-06-21 19:37:31.296651839
+0200
+++ b/startkde/startplasmacompositor.cmake 2018-06-21 19:38:21.243318161
+0200
@@ -218,6 +218,10 @@
XDG_CURRENT_DESKTOP=KDE
export XDG_CURRENT_DESKTOP
+#enforce wayland QPA
+QT_QPA_PLATFORM=wayland
+export QT_QPA_PLATFORM
+
# kwin_wayland can possibly also start dbus-activated services which need env
variables.
# In that case, the update in startplasma might be too late.
if which dbus-update-activation-environment >/dev/null 2>/dev/null ; then
--
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