[dolphin] [Bug 445065] New: Dolphin gets stuk when using Samba after the NAS falls asleep

[John van Spaandonk]

https://bugs.kde.org/show_bug.cgi?id=445065

            Bug ID: 445065
           Summary: Dolphin gets stuk when using Samba after the NAS falls
                    asleep
           Product: dolphin
           Version: 21.08.3
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: grave
          Priority: NOR
         Component: general
          Assignee: dolphin-bugs-null at kde.org
          Reporter: john at van-spaandonk.nl
                CC: kfm-devel at kde.org
  Target Milestone: ---

Created attachment 143273
  --> https://bugs.kde.org/attachment.cgi?id=143273&action=edit
system log showing a problem with dolphin - the kde file system

SUMMARY
I use a QNAP NAS wit a samba filesystem, the drives are mounted via fstab - see
below.
Sometimes, but not always, Dolphin gets stuck when writing or reading NAS
files.
This problem occurs much more in the last one or two months.
Also I often get a 1 to 2 -second delay when I first click on a NAS directory
in Dolphin.
(This occurs mainly in the last month or so separate issue, not topic of this
bug report).
I realize that this situation difficult to reproduce for the typical developer
working on a local filesystem on a laptop.
Let me know what extra info I need to provide / what experiments to do to
stabilize the network scenario for KDE.
I gave the bug a high priority since it prevents the use of KDE in a
professional environment with networked storage.

STEPS TO REPRODUCE
1. Try to open or save a file on the NAS, mounted with smb, especially after it
has fallen asleep
2.
3. 

OBSERVED RESULT
Dolphin stuck, everything using the file system stuck, such as the upload
dialog window for creating this bug report.
If I open a konsole window then I can normally access the NAS.
After a while the whole of KDE freezes and I I cannot shutdown the PC anymore
because after a while nothing reacts anymore in KDE, the keyboard does not work
anymore, only the mouse cursor still moves.

EXPECTED RESULT
1. If the NAS is sleeping I expect a delay of up to 10 seconds for the NAS
drives to spin up and the NAS, 
    and thus KDE, to react again.
2. I expect a message from Dolphin that a network storage is not responding /
Dolphin and KDE as a whole should never 
   get stuck due to a network problem.
(This has always always the main problem for me with KDE since I started using
it on a daily basis some 20 years ago)


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
The last line shows how the relevant NAS directory is mounted

# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sdc2 during installation
UUID=440e0d66-6a8d-4c7d-b0e4-7db611d24385 /               ext4   
errors=remount-ro 0       1
# /boot/efi was on /dev/sdc1 during installation
#UUID=C2C4-CCA8  /boot/efi       vfat    umask=0077      0       1
/swapfile                                 none            swap    sw           
  0       0

# ssd data directory, for downloads, thunderbird email, dropbox
UUID=d4f31c28-01ee-4252-bde7-671b459317fe       /media/ssd_data ext4    rw     
0       2
# QNAP TS219P+
//192.168.1.2/data      /media/nas_data  cifs   
user=xxxx,password=xxxx,rw,user,nosuid,uid=1000,gid=100,_netdev,vers=1.0    0  
    0

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