Bug 469424

Summary:	Krdc blue screen when connecting
Product:	[Applications] krdc	Reporter:	raldone01
Component:	VNC	Assignee:	Urs Wolfer <uwolfer>
Status:	RESOLVED WORKSFORME
Severity:	grave	CC:	aacid
Priority:	NOR
Version First Reported In:	23.04.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description raldone01 2023-05-06 17:41:48 UTC

SUMMARY
When connecting to x11vnc.
The vnc server is run with the following command.
`bash -c "x11vnc -display :0 -rfbauth /root/.vnc/passwd -auth $(find /var/run/sddm/ -type f | head -n 1) -shared -many -forever -reopen"`

STEPS TO REPRODUCE
Connect to the vnc server.

OBSERVED RESULT
Blue screen.

EXPECTED RESULT
The actual screen.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.27.4
KDE Frameworks Version: 5.105.0
Qt Version: 5.15.9
Kernel Version: 6.3.1-zen1-1-zen (64-bit)
Graphics Platform: X11/Wayland doesn't matter
Graphics Processor: Mesa Intel® Xe Graphics

ADDITIONAL INFORMATION
I run krdc on another arch linux machine and it works fine there WITH the same vnc server.
I made sure to install all listed optional dependencies.

Pacman information on the machine where it is not working:
```
?> pacman -Qi krdc
Name            : krdc
Version         : 23.04.0-1
Description     : Remote Desktop Client
Architecture    : x86_64
URL             : https://apps.kde.org/krdc/
Licenses        : GPL  LGPL  FDL
Groups          : kde-applications  kde-network
Provides        : None
Depends On      : kcmutils  kdnssd  knotifyconfig  kactivities
Optional Deps   : libvncserver: VNC support [installed]
                  libssh: VNC support [installed]
                  freerdp: RDP support [installed]
                  keditbookmarks: to edit bookmarks [installed]
Required By     : None
Optional For    : None
Conflicts With  : None
Replaces        : None
Installed Size  : 3.49 MiB
Packager        : Antonio Rojas <arojas@archlinux.org>
Build Date      : Fri Apr 14 14:28:15 2023
Install Date    : Sun Apr 23 15:52:25 2023
Install Reason  : Explicitly installed
Install Script  : No
Validated By    : Signature
```

Comment 1 raldone01 2023-05-06 17:44:49 UTC

What can I do to acquire more debug information. I couldn't find a verbose or log option of krdc.

Comment 2 Albert Astals Cid 2023-05-07 20:47:04 UTC

Just to confirm, you run the server with the same command line in two machines and the client in the same machine and when connecting to  one of the servers it works fine and when connecting to the other it does not?

Comment 3 raldone01 2023-05-07 22:06:14 UTC

No I have 3 machines.

Machine A is running the server.

Machines B and C are running the krcd clients.
One can connect the other shows a blue screen.
I did not connect them simultaneously.

Comment 4 Albert Astals Cid 2023-05-08 21:49:57 UTC

If you have two machines and one works and the other doesn't, that would seem a setup problem in one of your machines not an actual bug, i am not really sure what we can do since there's proof that it works.

Comment 5 Bug Janitor Service 2023-05-23 03:45:49 UTC

Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!

Comment 6 Bug Janitor Service 2023-06-07 03:45:36 UTC

This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!