[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-03-21 Thread olive
*** This bug is a duplicate of bug 2047256 ***
https://bugs.launchpad.net/bugs/2047256

for me the bug has disappeared since the version of Gnome 46

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Title:
  nautilus not generating thumbnails anymore

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-28 Thread Sebastien Bacher
*** This bug is a duplicate of bug 2047256 ***
https://bugs.launchpad.net/bugs/2047256

** This bug has been marked a duplicate of bug 2047256
   Ubuntu 24.04 Some image thumbnails no longer displayed

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Title:
  nautilus not generating thumbnails anymore

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-27 Thread Sebastien Bacher
it seems another fallout from the new apparmor restriction described in
bug #2046844 and probably a conflict with the sandboxing in
https://gitlab.gnome.org/GNOME/gnome-desktop/-/blob/master/libgnome-
desktop/gnome-desktop-thumbnail-script.c

** Changed in: nautilus (Ubuntu)
   Importance: Undecided => High

** Tags added: rls-nn-incoming

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Re: [ext] [Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-27 Thread Ralf Hildebrandt
* olive <2054...@bugs.launchpad.net>:

> the solution to not lose the configuration after the reboot :

by creating a file in /etc/sysctl.d, e.g.
/etc/sysctl.d/10-fix_nautilus
containing
kernel.apparmor_restrict_unprivileged_userns=0

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-26 Thread olive
the solution to not lose the configuration after the reboot :

sudo nano /etc/rc.local

The bash:
#!/bin/bash
# Votre commande ici
sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0

sudo chmod +x /etc/rc.local

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  nautilus not generating thumbnails anymore

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-21 Thread corrado venturini
THANKS, I hadn't emptied the folder ~/.cache/thumbnails/fail/gnome-
thumbnail-factory

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Re: [ext] [Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-19 Thread Ralf Hildebrandt
* corrado venturini <2054...@bugs.launchpad.net>:
> Suggested command seems ok but thumbnail generation still does not work (also 
> after reboot)

A reboot resets the "kernel.apparmor_restrict_unprivileged_userns" back
to its default value, so you must not reboot :)

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-18 Thread corrado venturini
In my system not upgraded but installed from ISO Ubuntu 24.04 LTS "Noble 
Numbat" - Daily amd64 (20240215) I have the same problem but my 
.cache/thumbnails is as follows
corrado@corrado-n4-nn-0215:~/.cache/thumbnails$ tree -d
.
├── fail
│   └── gnome-thumbnail-factory
├── large
└── normal

gnome-thumbnail-factory contains more than 200 .png files 1 × 1 pixel
large and normal contains few .png files

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-18 Thread corrado venturini
Suggested command seems ok but thumbnail generation still does not work (also 
after reboot)
corrado@corrado-n4-nn-0215:~$ sudo sysctl -w 
kernel.apparmor_restrict_unprivileged_userns=0
[sudo] password for corrado: 
kernel.apparmor_restrict_unprivileged_userns = 0
corrado@corrado-n4-nn-0215:~$

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  nautilus not generating thumbnails anymore

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-18 Thread Launchpad Bug Tracker
Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: nautilus (Ubuntu)
   Status: New => Confirmed

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-17 Thread Ralf Hildebrandt
After some digging I found
https://github.com/flatpak/flatpak/issues/5462
and alas:
sudo sysctl -w kernel.apparmor_restrict_unprivileged_userns=0
makes thumbnail generation work again.

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[Bug 2054183] Re: nautilus not generating thumbnails anymore

2024-02-17 Thread Ralf Hildebrandt
I id some tests, and while root was able to create thumbnails in
nautilus, I checked the logs and found:

Feb 17 09:20:51 comet kernel: audit: type=1400 audit(1708158051.561:1699): 
apparmor="DENIED" operation="userns_create" class="namespace" info="User 
namespace creation restricted" error=-13 profile="unconfined" pid=142479 
comm="bwrap" requested="userns_create" denied="userns_create"
Feb 17 09:20:51 comet kernel: audit: type=1400 audit(1708158051.565:1700): 
apparmor="DENIED" operation="userns_create" class="namespace" info="User 
namespace creation restricted" error=-13 profile="unconfined" pid=142480 
comm="bwrap" requested="userns_create" denied="userns_create"
Feb 17 09:20:51 comet kernel: audit: type=1400 audit(1708158051.569:1701): 
apparmor="DENIED" operation="userns_create" class="namespace" info="User 
namespace creation restricted" error=-13 profile="unconfined" pid=142481 
comm="bwrap" requested="userns_create" denied="userns_create"

This coincides with me deleting the bogus 1x1 thumbnails an re-entering
the folder...

** Bug watch added: github.com/flatpak/flatpak/issues #5462
   https://github.com/flatpak/flatpak/issues/5462

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