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...
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(170815805 1.561:1699) : 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" 1.565:1700) : 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" 1.569:1701) : 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"
Feb 17 09:20:51 comet kernel: audit: type=1400 audit(170815805
Feb 17 09:20:51 comet kernel: audit: type=1400 audit(170815805
This coincides with me deleting the bogus 1x1 thumbnails an re-entering the folder...