Thumbnails not working KDE plasma 6

[gordotito]

Hi community,

I’m writing a new topic because i need some help.
Since i did the last update, suddenly the thumbnails are not being shown in dolphin, even the monitor switcher do not show the logos.

My system:

inxi -Faz                                                                                                                 ✔
System:
  Kernel: 6.1.90-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 13.2.1
    clocksource: tsc avail: hpet,acpi_pm
    parameters: BOOT_IMAGE=/boot/vmlinuz-6.1-x86_64
    root=UUID=81e6cfa7-8060-4d99-80d0-3f7a5dd0ab6a rw acpi_osi=!
    "acpi_osi=Windows 2009" quiet
    resume=UUID=34c3ce69-a7a3-44aa-a141-51b765907742 udev.log_priority=3
  Desktop: KDE Plasma v: 6.0.4 tk: Qt v: N/A info: frameworks v: 6.1.0
    wm: kwin_wayland with: krunner vt: 1 dm: SDDM Distro: Manjaro
    base: Arch Linux

This is the last update i have done before it stopped working correctly (i don’t know if some of this packages have something to do):

[2024-05-19T10:40:16+0200] [PACMAN] Running 'pacman -Syu'
[2024-05-19T10:40:16+0200] [PACMAN] synchronizing package lists
[2024-05-19T10:40:18+0200] [PACMAN] starting full system upgrade
[2024-05-19T10:41:08+0200] [ALPM] running '00-timeshift-autosnap.hook'...
[2024-05-19T10:41:08+0200] [ALPM-SCRIPTLET] ==> skipping timeshift-autosnap due skipRsyncAutosnap in /etc/timeshift-autosnap.conf set to TRUE.
[2024-05-19T10:41:08+0200] [ALPM] transaction started
[2024-05-19T10:41:08+0200] [ALPM] removed qtermwidget5 (1.4.0-1)
[2024-05-19T10:41:08+0200] [ALPM] installed qtermwidget (1.4.0-2)
[2024-05-19T10:41:08+0200] [ALPM] upgraded octopi (0.15.0-6 -> 0.15.0-7)
[2024-05-19T10:41:08+0200] [ALPM] upgraded spectre-meltdown-checker (0.46+23+g0f2edb1-1 -> 0.46+26+gbd0c7c9-1)
[2024-05-19T10:41:09+0200] [ALPM] transaction completed
[2024-05-19T10:41:09+0200] [ALPM] running '30-systemd-update.hook'...
[2024-05-19T10:41:09+0200] [ALPM] running '90-packagekit-refresh.hook'...
[2024-05-19T10:41:09+0200] [ALPM] running 'gtk-update-icon-cache.hook'...
[2024-05-19T10:41:09+0200] [ALPM] running 'update-desktop-database.hook'...
[2024-05-19T10:41:42+0200] [PAMAC] synchronizing package lists
[2024-05-19T10:42:25+0200] [ALPM] transaction started
[2024-05-19T10:42:25+0200] [ALPM] installed ninja (1.12.0-2)
[2024-05-19T10:42:25+0200] [ALPM] installed python-tqdm (4.66.4-1)
[2024-05-19T10:42:25+0200] [ALPM] installed uasm (2.56.2-1)
[2024-05-19T10:42:25+0200] [ALPM] installed meson (1.4.0-5)
[2024-05-19T10:42:26+0200] [ALPM] transaction completed
[2024-05-19T10:42:26+0200] [ALPM] running '30-systemd-update.hook'...
[2024-05-19T10:42:26+0200] [ALPM] running '90-packagekit-refresh.hook'...
[2024-05-19T10:42:53+0200] [ALPM] running '00-timeshift-autosnap.hook'...
[2024-05-19T10:42:53+0200] [ALPM-SCRIPTLET] ==> skipping timeshift-autosnap due skipRsyncAutosnap in /etc/timeshift-autosnap.conf set to TRUE.
[2024-05-19T10:42:53+0200] [ALPM] transaction started
[2024-05-19T10:42:53+0200] [ALPM] upgraded 7-zip (23.01-1 -> 24.05-1)
[2024-05-19T10:42:54+0200] [ALPM] transaction completed
[2024-05-19T10:42:54+0200] [ALPM] running '30-systemd-update.hook'...
[2024-05-19T10:42:54+0200] [ALPM] running '90-packagekit-refresh.hook'...
[2024-05-19T10:42:59+0200] [PAMAC] synchronizing package lists
[2024-05-19T10:43:31+0200] [PAMAC] synchronizing package lists

As i mentioned before, thumbnails stopped working, for img, files, pdf, everything, but it does work in the dolphin information panel:

The display switcher:

I copied an IMG to the desktop, and i realised that the thumbnail would be shown in the monitor that was set to seconday, if i change the monitor config it would be shown in the second monitor.
Anyway if i open any file, they are all just fine.

I removed the thumbnails cache, and restarted dolphin, but nothing change, and i got this message in the terminal:

rm -r ~/.cache/thumbnails 

dolphin &

kf.kio.gui: Cannot read information about filesystem under path "/home/user/.cache/thumbnails/"
qt.gui.icc: fromIccProfile: failed minimal tag size sanity
qt.gui.imageio: libpng warning: profile matches sRGB but writing iCCP instead

permissions:

ls -ld ~
drwx------ 57 user user 4096 may 22 11:53 /home/user

~ ls -ld ~/.cache
drwxr-xr-x 86 user user 4096 may 22 11:53 /home/user/.cache

~ ls -ld ~/.cache/thumbnails
drwxr-xr-x 6 user user 4096 ago 16  2021 /home/user/.cache/thumbnails

I also change the dolphin config, and setted it back to default, but it did not help.

If i login in a NEW Profile account, everything works just fine.

I would really appreciate any advice that could help me to solve this inconvenience.
Thanks!!

[omano]

Logout. Delete your ~/.cache folder. Login.

[linux-aarhus]

For known issues and solutions - please see → [Stable Update] 2024-05-18 - Linux-Firmware, PHP, Gitlab, Qt6 - #2 by philm

[gordotito]

When i run dolphin & and open an image, i get this message in the terminal:

kf.kio.core: An error occurred during write. The worker terminates now.                                                                    
kf.i18n.kuit: "Unknown subcue ':whatsthis,' in UI marker in context {@info:whatsthis, %1 the action's text}."
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-aptus-mos"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-arq"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-bay"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-bmq"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-cap"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-cine"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-cs1"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-dc2"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-drf"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-dxo"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-epson-eip"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-epson-erf"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-fff"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-hasselblad-3fr"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-iiq"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-kodak-dcs"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-kodak-kc2"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-mamiya-mef"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-mfw"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-minolta-mdc"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-mng"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-obm"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-ori"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-ptx"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-pxn"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-qtk"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-r3d"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-raw"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-rdc"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-rwl"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-rwz"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-samsung-srw"
org.kde.kdegraphics.gwenview.lib: Unresolved mime type  "image/x-sti"
org.kde.kdegraphics.gwenview.lib: Unresolved raw mime type  "image/x-samsung-srw"

Shall i try to Reset KDE Configuration (is it safe?):

mv ~/.config/kde.org ~/.config/kde.org.backup
mv ~/.config/kdeglobals ~/.config/kdeglobals.backup
mv ~/.config/dolphinrc ~/.config/dolphinrc.backup

[gordotito]

I’ve already done it.
When logged out i entered to the virtual console and deleted ~/.cache, but when go back to the GUI and login to my user, everything continues the same way.

[gordotito]

SOLVED
The problem was that the Show preview (F12) in the Dolphin configuration was deactivated.
menu > more > view > show preview
So simple.

The “Display Switch” or “Display Configuration” is still not working as mentioned before, but for the moment it is not a big deal, besides it should be a simple solution.

Thanks!