Bug 458040

Summary: Java Application gets no input focus when displayed through ETX
Product: [Plasma] kwin Reporter: cparg
Component: generalAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: major CC: nate
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: RedHat Enterprise Linux   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description cparg 2022-08-18 17:38:08 UTC 
SUMMARY
* Java Application on ETX does not get input focus


STEPS TO REPRODUCE
1. Local KDE-Plasama Desktop (kwin window manager)
2. Start a seamless ETX (Exceed Turbo X from OpenText) session
3. Start any Java Application on the remote side

OBSERVED RESULT
- The Minimize button is missing on the Window decorations
- The application does not "active" color
- If another non-Java application is behind the Java application, any input event (mouse or keyboard) goes to the window behind, although the (java) window is on top.

I know this is very specific to ETX and KDE as local window manager and Java Applications on the remote side.
I don't know how to further debug this. I suspect some WM properties or X11 events get lost through the ETX channell, but how to prove that to OpenText, the vendor of ETX ?
It is also very specific to kwin! 
metacity WM, fvwm, twm do not behave like that.
What is kwin doing differently? Can it be put into a less sophisticated mode to behave like those other WMs ?

EXPECTED RESULT
- Java applications on ETX shall get the intended X11 events

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: 5.x
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
- Please help debugging this issue. Many thanks.
Comment 1 Nate Graham 2022-08-22 23:48:00 UTC 
What Plasma/KWin version are you seeing this problem with?
Comment 2 Bug Janitor Service 2022-09-06 04:36:17 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 3 Bug Janitor Service 2022-09-21 04:47:23 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!