https://bugs.kde.org/show_bug.cgi?id=513865
Bug ID: 513865
Summary: KRDC on Plasma6/ wayland: Client does not support
H.264 in YUV420 mode!
Classification: Applications
Product: krdc
Version First 25.12.0
Reported In:
Platform: Ubuntu
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: RDP
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
SUMMARY
2025-12-26T20:10:27.753432-08:00 PC1 krdpserver[19144]: org.kde.krdp: Session
setup completed, start processing...
2025-12-26T20:10:43.940659-08:00 PC1 krdpserver[19144]: org.kde.krdp: New
client connected: Unspecified platform Unspecified version
2025-12-26T20:10:43.940884-08:00 PC1 krdpserver[19144]: org.kde.krdp:
Attempting authenticating user with PAM
2025-12-26T20:10:44.001416-08:00 PC1 krdpserver[19144]: org.kde.krdp: PAM
authentication succeeded for user "dte"
2025-12-26T20:10:44.005197-08:00 PC1 krdpserver[19144]: org.kde.krdp: Video
stream initialized
2025-12-26T20:10:44.005379-08:00 PC1 krdpserver[19144]: org.kde.krdp:
Initializing Freedesktop Portal Session
2025-12-26T20:10:44.010299-08:00 PC1 kded6[2755]: Registering
":1.129/StatusNotifierItem" to system tray
2025-12-26T20:10:44.019048-08:00 PC1 krdpserver[19144]: org.kde.krdp: Received
caps:
2025-12-26T20:10:44.019074-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_8 AVC: false YUV420: false
2025-12-26T20:10:44.019089-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_81 AVC: false YUV420: false
2025-12-26T20:10:44.019113-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_10 AVC: false YUV420: false
2025-12-26T20:10:44.019128-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_101 AVC: true YUV420: false
2025-12-26T20:10:44.019141-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_102 AVC: false YUV420: false
2025-12-26T20:10:44.019162-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_103 AVC: false YUV420: false
2025-12-26T20:10:44.019175-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_104 AVC: false YUV420: true
2025-12-26T20:10:44.019188-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_105 AVC: false YUV420: true
2025-12-26T20:10:44.019201-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_106 AVC: false YUV420: true
2025-12-26T20:10:44.019214-08:00 PC1 krdpserver[19144]: org.kde.krdp:
UNKNOWN_VERSION AVC: false YUV420: false
2025-12-26T20:10:44.019228-08:00 PC1 krdpserver[19144]: org.kde.krdp:
RDPGFX_CAPVERSION_107 AVC: false YUV420: true
2025-12-26T20:10:44.019241-08:00 PC1 krdpserver[19144]: org.kde.krdp: Client
does not support H.264 in YUV420 mode!
2025-12-26T20:10:44.019262-08:00 PC1 krdpserver[19144]: [20:10:44:019]
[19144:00004c14] [ERROR][com.freerdp.core.peer] - [rdp_set_error_info]:
ERRINFO_GRAPHICS_SUBSYSTEM_FAILED [0x0001112F]
STEPS TO REPRODUCE
OBSERVED RESULT
Latest snap install or remmina works though.
EXPECTED RESULT
SOFTWARE/OS VERSIONS
KRDC 25.12.0
cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=26.04
DISTRIB_CODENAME=resolute
DISTRIB_DESCRIPTION="Ubuntu Resolute Raccoon (development branch)"
Operating System: Kubuntu 26.04
KDE Plasma Version: 6.5.4
KDE Frameworks Version: 6.21.0
Qt Version: 6.9.2
Kernel Version: 6.18.0-8-generic (64-bit)
Graphics Platform: Wayland
ADDITIONAL INFORMATION
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