Bug 483734

Summary:	Dolphin Fails to Remember Default Applications in Non-KDE Environments
Product:	[Applications] dolphin	Reporter:	raven2cz <tonda.fischer>
Component:	general	Assignee:	Dolphin Bug Assignee <dolphin-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	dolphin-bugs-null, ray.parker, tuxnix
Priority:	NOR	Keywords:	qt6
Version First Reported In:	24.02.0
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description raven2cz 2024-03-16 09:00:53 UTC

SUMMARY
***
Dolphin forgets default applications for file extensions outside of KDE environments, such as in awesomeWM, requiring re-assignment after each restart.
***

### STEPS TO REPRODUCE
1. Set default applications for various file extensions in Dolphin. The apps are remembered and called correctly.
2. Restart PC.
3. Open Dolphin and try to open files with previously set default applications. Information is lost. Necessary to insert default app again...

### OBSERVED RESULT
Dolphin does not remember the set default applications for any file extensions and prompts for default application selection again. After a system restart, Dolphin still does not remember any default applications for file extensions.

### EXPECTED RESULT
Dolphin should remember the default applications for file extensions across different desktop environments and sessions, similar to its behavior within KDE Plasma 5 environments. This expected behavior indicates a potential issue with Dolphin's integration or use of `xdg-open` or similar mechanisms for handling default applications in non-KDE environments.

### SOFTWARE/OS VERSIONS
Operating System: Arch Linux
KDE Plasma Version: 6.0.2
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2
Kernel Version: 6.7.9-zen1-1-zen (64-bit)
Graphics Platform: X11
Processors: 12 × AMD Ryzen 5 3600 6-Core Processor
Memory: 31.3 GiB of RAM
Graphics Processor: AMD Radeon RX 6700 XT
Manufacturer: Gigabyte Technology Co., Ltd.
Product Name: X570 AORUS ULTRA
System Version: -CF

### ADDITIONAL INFORMATION
This issue seems specific to Dolphin; other applications do not exhibit this problem and correctly remember their default application settings across sessions and different window managers. This might suggest a problem with how Dolphin interacts with the system's default application settings outside of KDE environments, possibly related to `xdg-open` or another mechanism Dolphin uses to manage default applications.

Comment 1 Ray7 2024-03-16 10:01:06 UTC

I can confirm this for the "Dolphin" / "File Manger Super User Mode". Only for example "show sidebar" saves with settings only with "unlock sidebar"; make changes an then "lock sidebar".

Comment 2 Ray7 2024-03-16 10:02:24 UTC

I can confirm this for the "Dolphin" / "File Manger Super User Mode". Only for example "show sidebar" saves with settings only with "unlock sidebar"; make changes an then "lock sidebar". 

(Open Suse Tumbleweed, Plasma 6.0.2, KDE-Framework 6.0.0, Qt 6.6.2)

Comment 3 raven2cz 2024-03-31 06:39:28 UTC

I have to manually start /bin/kded6 which ensures handling mime types and default apps. It seems that this is some "gap" in the service dependencies between kded6 and dolphin.

Comment 4 tuxnix 2024-12-28 01:36:11 UTC

I can confirm this.
I'm using sway desktop on Arch Linux. When I'm using systemsettings 6.2.4-1 mime-types will not be saved.
Although with dolphin, kmail, kate ect.  
On terminal I get this output from kcmshell6 filetypes:

```
$ kcmshell6 filetypes
"video/mp2t" hasDefinitionFile: false
kf.service.services: KServiceFactory: unexpected object entry in KSycoca database (type= 306 )
kf.service.services: KServiceFactory: unexpected object entry in KSycoca database (type= 306 )
kf.coreaddons: The plugin "/usr/lib/qt6/plugins/kf6/parts/markdownpart.so" explicitly states an 'Id' in the embedded metadata. This value should be removed, the resulting pluginId will not be affected by it
Mimetype Comment Dirty: old= "PKCS#12 Personal Key and Certificates" m_comment= "PKCS#12-Zertifikatpaket"
Mimetype Comment Dirty: old= "Word-Dokument" m_comment= "Microsoft Word Document"
Mimetype Comment Dirty: old= "ODB-Datenbank" m_comment= "OpenDocument Database"
Mimetype Comment Dirty: old= "PKCS#12-Zertifikatpaket" m_comment= "PKCS#12 Personal Key and Certificates"
Mimetype Comment Dirty: old= "PKCS#7-Datei" m_comment= "PKCS#7-Zertifikatpaket"
Mimetype Comment Dirty: old= "OVF-Datenträgerabbild" m_comment= "Open Virtualization Format Archive"
Mimetype Comment Dirty: old= "VDI-Datenträgerabbild" m_comment= "Virtual Disk Image"
Mimetype Comment Dirty: old= "VHD-Datenträgerabbild" m_comment= "Virtual Hard Disk"
Mimetype Comment Dirty: old= "VMDK-Datenträgerabbild" m_comment= "Virtual Machine Disk Format"
Mimetype Comment Dirty: old= "X.509-Zertifikat" m_comment= "DER/PEM/Netscape-verschlüsseltes X.509-Zertifikat"
Mimetype Comment Dirty: old= "PKCS#12 Personal Key and Certificates" m_comment= "PKCS#12-Zertifikatpaket"
Entry  "application/pkcs12"  is dirty. Saving.
Mimetype Comment Dirty: old= "PKCS#12 Personal Key and Certificates" m_comment= "PKCS#12-Zertifikatpaket"
writing "/home/matthias/.local/share/mime/packages/application-pkcs12.xml"
Mimetype Comment Dirty: old= "Word-Dokument" m_comment= "Microsoft Word Document"
Entry  "application/vnd.ms-word"  is dirty. Saving.
Mimetype Comment Dirty: old= "Word-Dokument" m_comment= "Microsoft Word Document"
writing "/home/matthias/.local/share/mime/packages/application-vnd.ms-word.xml"
Mimetype Comment Dirty: old= "ODB-Datenbank" m_comment= "OpenDocument Database"
Entry  "application/vnd.sun.xml.base"  is dirty. Saving.
Mimetype Comment Dirty: old= "ODB-Datenbank" m_comment= "OpenDocument Database"
writing "/home/matthias/.local/share/mime/packages/application-vnd.sun.xml.base.xml"
Mimetype Comment Dirty: old= "PKCS#12-Zertifikatpaket" m_comment= "PKCS#12 Personal Key and Certificates"
Entry  "application/x-pkcs12"  is dirty. Saving.
Mimetype Comment Dirty: old= "PKCS#12-Zertifikatpaket" m_comment= "PKCS#12 Personal Key and Certificates"
writing "/home/matthias/.local/share/mime/packages/application-x-pkcs12.xml"
Mimetype Comment Dirty: old= "PKCS#7-Datei" m_comment= "PKCS#7-Zertifikatpaket"
Entry  "application/x-pkcs7-certificates"  is dirty. Saving.
Mimetype Comment Dirty: old= "PKCS#7-Datei" m_comment= "PKCS#7-Zertifikatpaket"
writing "/home/matthias/.local/share/mime/packages/application-x-pkcs7-certificates.xml"
Mimetype Comment Dirty: old= "OVF-Datenträgerabbild" m_comment= "Open Virtualization Format Archive"
Entry  "application/x-virtualbox-ova"  is dirty. Saving.
Mimetype Comment Dirty: old= "OVF-Datenträgerabbild" m_comment= "Open Virtualization Format Archive"
writing "/home/matthias/.local/share/mime/packages/application-x-virtualbox-ova.xml"
Mimetype Comment Dirty: old= "VDI-Datenträgerabbild" m_comment= "Virtual Disk Image"
Entry  "application/x-virtualbox-vdi"  is dirty. Saving.
Mimetype Comment Dirty: old= "VDI-Datenträgerabbild" m_comment= "Virtual Disk Image"
writing "/home/matthias/.local/share/mime/packages/application-x-virtualbox-vdi.xml"
Mimetype Comment Dirty: old= "VHD-Datenträgerabbild" m_comment= "Virtual Hard Disk"
Entry  "application/x-virtualbox-vhd"  is dirty. Saving.
Mimetype Comment Dirty: old= "VHD-Datenträgerabbild" m_comment= "Virtual Hard Disk"
writing "/home/matthias/.local/share/mime/packages/application-x-virtualbox-vhd.xml"
Mimetype Comment Dirty: old= "VMDK-Datenträgerabbild" m_comment= "Virtual Machine Disk Format"
Entry  "application/x-virtualbox-vmdk"  is dirty. Saving.
Mimetype Comment Dirty: old= "VMDK-Datenträgerabbild" m_comment= "Virtual Machine Disk Format"
writing "/home/matthias/.local/share/mime/packages/application-x-virtualbox-vmdk.xml"
Mimetype Comment Dirty: old= "X.509-Zertifikat" m_comment= "DER/PEM/Netscape-verschlüsseltes X.509-Zertifikat"
Entry  "application/x-x509-ca-cert"  is dirty. Saving.
Mimetype Comment Dirty: old= "X.509-Zertifikat" m_comment= "DER/PEM/Netscape-verschlüsseltes X.509-Zertifikat"
writing "/home/matthias/.local/share/mime/packages/application-x-x509-ca-cert.xml"
Entry  "video/mp2t"  is dirty. Saving.
kf.service.services: KServiceFactory: unexpected object entry in KSycoca database (type= 306 )
kf.coreaddons: The plugin "/usr/lib/qt6/plugins/kf6/parts/markdownpart.so" explicitly states an 'Id' in the embedded metadata. This value should be removed, the resulting pluginId will not be affected by it
"video/mp2t" hasDefinitionFile: false

```