Current KDE prevents Server GUI from exiting

[rdica]

Discussed in https://github.com/orgs/jamulussoftware/discussions/3006

^{Originally posted by pcar75 February 9, 2023}
Bonjour,
On my dual boot PC, I can shutdown Jamulus server in Windows 10. However I can't do that in Linux, because I believe it installs itself as a service. Is there a nicer (GUI) way of shuting down Jamulus server, instead of running a script or terminal with killall -I "jamulus" ?

Context : dual Boot PC : Windows 10 / Ubuntu Studio 22.04.1 LTS (Plasma KDE).
On Windows
Jamulus server (3.9.1) with GUI
Menu > Window > Exit (Ctrl+Q) : OK terminates process & threads
X Button : OK terminates process & threads
On Ubuntu Studio 22.04.1 LTS
Jamulus server (3.9.1) with GUI and Icon in system tray bar
Menu > Window > Exit (Ctrl+Q) : Hides GUI only
X (Close) Button : Hides GUI only
Sys tray Exit (Icon menu buttons = Exit, Show, Hide...) : Hides GUI if it was visible ( ~ Exit ICON menu).

EDIT : added precision : Ubuntu Studio 22.04.1 LTS and Qt is 5.15.3 as mentioned below (rdica).

It seems that latest KDE on at least Ubuntu 22.04+ and Fedora37 has introduced a change that prevents exiting the server process when the server GUI is started. Exiting merely closes the GUI window, but leaves the tray icon running as well as the server process itself.

As noted in the original discussion thread, disabling the tray icon functionality returns proper exit behaviour.
Personally I feel this is a bug and as current and future linux distros using KDE desktops will continue to experience the problem, it should be addressed as such, however it's been deemed not a bug, so the following request.

Request that either the tray icon be removed altogether, or a toggle be added to disable it.

Thanks!

[pljones]

@rdica does this happen if you run the Jamulus server GUI from a shell prompt? Or is it only if you use the provided desktop shortcut?

(I run my Linux KDE desktop remoted to Windows over VcXsvr and I can't reproduce the problem - I don't use the KDE desktop itself, though - just the windows, managed by MS Windows 11.)

[rdica]

@pljones Yes, also happens when started from shell prompt.

[pljones]

Thanks. Can you write down the full command line you use?

[rdica]

jamulus -s

[pljones]

OK.

• Run the server GUI as above and then in another terminal do ps -ef | grep "jamulus -s" and paste the results
• Use "Window -> Exit" (or Ctrl+Q) in the server GUI to exit and then in the other terminal do ps -ef | grep "jamulus -s" and paste the results again

Thanks.

[rdica]

Startup:

ardy@daw1:~$ ps -ef|grep "jamulus -s"
ardy        7762    3240  1 12:21 pts/2    00:00:00 jamulus -s

After closing:

ardy@daw1:~$ ps -ef|grep "jamulus -s"
ardy        7762    3240  0 12:21 pts/2    00:00:00 jamulus -s

[pljones]

Strange... Can you do ls -l .config/Jamulus/ and paste here, please.

[rdica]

ardy@daw1:~$ ls -l .config/Jamulus/
total 376
-rw-rw-r-- 1 ardy ardy 74660 Aug 12 22:24 Jamulus.ini
-rw-rw-r-- 1 ardy ardy 74616 Mar  1 13:42 Jamulus.ini-bak-20230228
-rw-rw-r-- 1 ardy ardy 72061 Jan 22  2023 Jamulus.ini.orig
-rw-rw-r-- 1 ardy ardy   547 Aug 13 12:28 Jamulusserver.ini
-rw-rw-r-- 1 ardy ardy 74053 Jul 31 18:42 KEYS.ini
-rw-rw-r-- 1 ardy ardy 72123 Feb 13 13:47 test.ini

cat .config/Jamulus/Jamulusserver.ini 
<server>
 <winposmain_base64>AdnQywADAAAAAAUWAAAAOwAAB2EAAALBAAAFFgAAADsAAAdhAAACwQAAAAAAAAAAB4AAAAUWAAAAOwAAB2EAAALB</winposmain_base64>
 <directorytype>-1</directorytype>
 <name>Disabled Icon Tray</name>
 <city>Home</city>
 <country>225</country>
 <norecord>0</norecord>
 <welcome>VWJ1bnR1IFN0dWRpbyAyMi4wNA==</welcome>
 <language>en</language>
 <recordingdir_base64></recordingdir_base64>
 <directoryaddress></directoryaddress>
 <directoryfile_base64></directoryfile_base64>
 <autostartmin>0</autostartmin>
 <delaypan>1</delaypan>
</server>

[pljones]

Right... digging deeper (and getting out of my depth :) )...

Could you run Jamulus Server with strace, catching all the output:

strace jamulus -s > log 2>&1

then hit Ctrl-Q to quit once the window opens. Then run

grep -v '^\(writev\|getrandom\|futex\|brk\|poll\|recvmsg\|mmap\|munmap\|mprotect\|.*fonts\|.*fontconfig\|.*opt.Qt\|read.*ELF\|.*\.so\.\)' log | tail -40

to see the last 40 lines of the log (with boring bits removed) and paste the result, please.

(Or drag-n-drop the log file complete.)

[rdica]

Did the latter as I couldn't ensure the last 40 lines would reflect attempt to close. File created using strace -o jamulusserver.log jamulus -s, then attempt to close window, then exit program.

jamulusserver.log