*** This bug is a duplicate of bug 1851160 ***
https://bugs.launchpad.net/bugs/1851160
I spent quite some time today trying various things to get rid of this
issue. Below is what I figured out:
* I did a fresh install of Budgie 19.10 and faced the issue described.
* Installing Budgie 19.04 and performing an in-place update rather than a fresh
install seems to avoid the problem.
* I tried the 20.04 daily from today (2019-11-22) and faced the same problem.
Hence I cannot confirm that 20.04 does not have this issue.
* I compared qt5 packages installed in Budgie 19.04 and 19.10.
qt5-gtk2-platformtheme is present in 19.10 but not in 19.04. As written in the
beginning of this thread removing this package makes the problem disappear but
also theming of the affected apps is gone. On the other hand theming in 19.04
is perfectly fine even without the mentioned package. Furthermore 19.04 has the
packages qt5-style-platform-gtk2 and qt5-style-plugin-gtk2 without a dependency
to qt-gtk2-platformtheme. I tried installing the same set of packages on 19.10
which was not possible without breaking dependencies since those packages
depend on qt-gtk2-platformtheme in 19.10.
* Forcing the same set of packages directly using dpkg also did not bring back
proper theming.
* Version of all those *gtk2* packages are the same in 19.04 and 19.10 so that
I suspect that the problem lies somewhere else.
* I can also confirm that using dbus-launch makes the applications start fast.
However, integration into Budgie desktop is lost and it has the penalty of
additional dbus processes.
Hope this helps finding the root cause of this issue.
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https://bugs.launchpad.net/bugs/1852935
Title:
In Ubuntu Budgie, QT apps take a long time to open
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