https://bugs.kde.org/show_bug.cgi?id=411415
--- Comment #6 from Rylsm <ry...@outlook.com> ---
Looks like the hang occurs when these warning messages started to appear on
after I do anything related to Meta key press.
[warning 17:50:40.907907] - Expected JSON property "X-Plasma-Provides" to be a
single string. but it is a stringlist
[warning 17:51:10.945945] - QProcess: Destroyed while process ("kreadconfig5")
is still running.
[warning 17:51:40.974974] - Expected JSON property "X-Plasma-Provides" to be a
single string. but it is a stringlist
[warning 17:52:11.012012] - QProcess: Destroyed while process ("kreadconfig5")
is still running.
[warning 17:52:41.023023] - Expected JSON property "X-Plasma-Provides" to be a
single string. but it is a stringlist
[warning 17:53:11.062062] - QProcess: Destroyed while process ("kreadconfig5")
is still running.
[warning 17:53:41.092092] - Expected JSON property "X-Plasma-Provides" to be a
single string. but it is a stringlist
[warning 17:54:11.128128] - QProcess: Destroyed while process ("kreadconfig5")
is still running.
Also the process "kreadconfig5" owned by latte-dock turns to a zombie process
during the hang and then "disappear"/clean properly after a while or it will
just hang indefinitely and killing the latte-dock process is the only solution.
ps aux | grep kreadconfig5
xxxxx 4406 0.0 0.0 0 0 pts/3 Z+ 17:50 0:00 [kreadconfig5]
<defunct>
xxxxx 4522 0.0 0.0 0 0 pts/3 Z+ 17:51 0:00 [kreadconfig5]
<defunct>
xxxxx 4532 0.0 0.0 0 0 pts/3 Z+ 17:52 0:00 [kreadconfig5]
<defunct>
xxxxx 4593 0.0 0.0 6276 2372 pts/4 R+ 17:53 0:00 grep --color
kreadconfig5
pstree -p -s 4406
systemd(1)───yakuake(1414)───zsh(3936)───latte-dock(4323)───kreadconfig5(4406)
pstree -p -s 4522
systemd(1)───yakuake(1414)───zsh(3936)───latte-dock(4323)───kreadconfig5(4522)
pstree -p -s 4532
systemd(1)───yakuake(1414)───zsh(3936)───latte-dock(4323)───kreadconfig5(4532)
The only part of Latte Dock code that explicitly call QProcess to kreadconfig5
is here:
https://phabricator.kde.org/source/latte-dock/browse/master/?grep=kreadconfig
What do you think? Is this Qt bug? Race condition?
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