https://bugs.kde.org/show_bug.cgi?id=485215
Bug ID: 485215
Summary: [Plasma 6 REGRESSION] KRDC hangs when trying to
connect to VNC host
Classification: Applications
Product: krdc
Version: 24.02.1
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: VNC
Assignee: uwol...@kde.org
Reporter: chemob...@gmail.com
Target Milestone: ---
SUMMARY
I just upgraded from Fedora 39 to 40, i.e. I moved from KDE Plasma 5 to Plasma
6. KRDC connections using VNC plugin stopped working: KRDC hangs before even
trying to create a network connection.
STEPS TO REPRODUCE
1. start connection to host using vnc protocol
OBSERVED RESULT
Nothing: krdc application stops responding. E.g. disconnect or close window
leads to "krdc application does not respond" dialog.
According to networking status krdc hangs before even trying to create a
network connection. I.e. this problem can even be reproduced by trying to
connect to a non-existing VNC host.
EXPECTED RESULT
Connection to VNC host succeeds.
SOFTWARE/OS VERSIONS
Operating System: Fedora Linux 40
KDE Plasma Version: 6.0.3
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.8.2-300.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
* I tried on two different systems: same result
* I used tigervnc client to connect to VNC host: works fine
* I tried "krdc --platform xcb": no result
* I deleted all KRDC configurations from my home directory and then tried to
create a new connection: same result (i.e. not caused by old Plasma 5 settings)
* I enabled TEST plugin and created a connection using "test:" protocol: works
fine, i.e. I get a window with yellow background (I guess that is what the test
plugin generates). I can successfully disconnect from this connection
* (I don't have a RDP host available for real testing, sorry) I created a RDP
connection to a non-existing host: KRDC tries to connect to the host and
returns after a short while "can't connect to host", i.e. it seems that RDP
plugin works fine.
When I run "krdc" from the konsole the only messages I get are these at
startup:
~~~
kf.coreaddons: The plugin "/usr/lib64/qt6/plugins/krdc/libkrdc_vncplugin.so"
explicitly states an Id in the embedded metadata, which is different from the
one derived from the filename The Id field from the KPlugin object in the
metadata should be removed
kf.coreaddons: The plugin "/usr/lib64/qt6/plugins/krdc/libkrdc_testplugin.so"
explicitly states an Id in the embedded metadata, which is different from the
one derived from the filename The Id field from the KPlugin object in the
metadata should be removed
kf.coreaddons: The plugin "/usr/lib64/qt6/plugins/krdc/libkrdc_rdpplugin.so"
explicitly states an Id in the embedded metadata, which is different from the
one derived from the filename The Id field from the KPlugin object in the
metadata should be removed
qt.core.qobject.connect: QObject::connect: No such signal
KBookmarkManager::changed(QString,QString)
~~~
There are no additional messages when I try to create the VNC connection
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