https://bugs.kde.org/show_bug.cgi?id=526464
Bug ID: 526464
Summary: KRDC RDP plugin cannot transfer clipboard images while
xfreerdp 3.32.1 can
Classification: Applications
Product: krdc
Version First unspecified
Reported In:
Platform: Other
OS: Other
Status: REPORTED
Severity: normal
Priority: NOR
Component: RDP
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Environment
- Kubuntu 26.04
- KDE Plasma 6
- KRDC
- FreeRDP 3.32.1 built from upstream sources
Problem
Clipboard text transfer works correctly.
Clipboard image transfer does not work in KRDC.
The same remote Windows host allows clipboard image transfer when using
xfreerdp 3.32.1 directly.
Investigation
I initially experienced severe clipboard problems with the Ubuntu-packaged
FreeRDP 3.32.0 libraries. To eliminate FreeRDP as a potential cause, I built
and installed upstream FreeRDP 3.32.1 into:
/opt/freerdp-3.32.1
I then forced KRDC to load those libraries via LD_LIBRARY_PATH and verified the
result using ldd.
Verification
Command:
LD_LIBRARY_PATH=/opt/freerdp-3.32.1/lib \
ldd /usr/lib/x86_64-linux-gnu/qt6/plugins/krdc/krdc_rdpplugin.so \
| egrep 'freerdp|winpr'
Result:
libfreerdp-client3.so.3 =>
/opt/freerdp-3.32.1/lib/libfreerdp-client3.so.3
libfreerdp3.so.3 =>
/opt/freerdp-3.32.1/lib/libfreerdp3.so.3
libwinpr3.so.3 =>
/opt/freerdp-3.32.1/lib/libwinpr3.so.3
This confirms that KRDC is using the exact same FreeRDP 3.32.1 libraries as the
standalone xfreerdp client.
Comparison
Using KRDC:
- Text clipboard works
- Image clipboard does not work
Using xfreerdp 3.32.1:
- Text clipboard works
- Image clipboard works
- File clipboard works
Test conditions
- Same Linux workstation
- Same KDE session
- Same Windows server
- Same user account
- Same FreeRDP 3.32.1 libraries
Conclusion
Because xfreerdp 3.32.1 successfully transfers clipboard images while KRDC does
not, despite both using the exact same FreeRDP 3.32.1 libraries, the issue
appears to be located in KRDC's RDP clipboard implementation rather than in
FreeRDP itself.
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