This work around may not work for some cameras as gnome-raw-thumbnailer is not in active development and has not been updated in years.
People wishing to use ufraw for thumbnail duties should amend the exec line to read
exec=/usr/bin/ufraw-batch --embedded-image --out-type=png --size=%s %u --overwrite --silent --output=%o
Giving
[Thumbnailer Entry] Exec=/usr/bin/ufraw-batch --embedded-image --out-type=png --size=%s %u --overwrite --silent --output=%o MimeType=image/x-3fr;image/x-adobe-dng;image/x-arw;image/x-bay;image/x-canon-cr2;image/x-canon-crw;image/x-cap;image/x-cr2;image/x-crw;image/x-dcr;image/x-dcraw;image/x-dcs;image/x-dng;image/x-drf;image/x-eip;image/x-erf;image/x-fff;image/x-fuji-raf;image/x-iiq;image/x-k25;image/x-kdc;image/x-mef;image/x-minolta-mrw;image/x-mos;image/x-mrw;image/x-nef;image/x-nikon-nef;image/x-nrw;image/x-olympus-orf;image/x-orf;image/x-panasonic-raw;image/x-pef;image/x-pentax-pef;image/x-ptx;image/x-pxn;image/x-r3d;image/x-raf;image/x-raw;image/x-rw2;image/x-rwl;image/x-rwz;image/x-sigma-x3f;image/x-sony-arw;image/x-sony-sr2;image/x-sony-srf;image/x-sr2;image/x-srf;image/x-x3f;
The genuine fix is all package maintainers repackage all Ubuntu raw thumbnailers to support the current gnome desktop method of producing thumbnails.
This work around may not work for some cameras as gnome-raw- thumbnailer is not in active development and has not been updated in years.
People wishing to use ufraw for thumbnail duties should amend the exec line to read
exec=/usr/ bin/ufraw- batch --embedded-image --out-type=png --size=%s %u --overwrite --silent --output=%o
Giving
[Thumbnailer Entry] bin/ufraw- batch --embedded-image --out-type=png --size=%s %u --overwrite --silent --output=%o image/x- 3fr;image/ x-adobe- dng;image/ x-arw;image/ x-bay;image/ x-canon- cr2;image/ x-canon- crw;image/ x-cap;image/ x-cr2;image/ x-crw;image/ x-dcr;image/ x-dcraw; image/x- dcs;image/ x-dng;image/ x-drf;image/ x-eip;image/ x-erf;image/ x-fff;image/ x-fuji- raf;image/ x-iiq;image/ x-k25;image/ x-kdc;image/ x-mef;image/ x-minolta- mrw;image/ x-mos;image/ x-mrw;image/ x-nef;image/ x-nikon- nef;image/ x-nrw;image/ x-olympus- orf;image/ x-orf;image/ x-panasonic- raw;image/ x-pef;image/ x-pentax- pef;image/ x-ptx;image/ x-pxn;image/ x-r3d;image/ x-raf;image/ x-raw;image/ x-rw2;image/ x-rwl;image/ x-rwz;image/ x-sigma- x3f;image/ x-sony- arw;image/ x-sony- sr2;image/ x-sony- srf;image/ x-sr2;image/ x-srf;image/ x-x3f;
Exec=/usr/
MimeType=
The genuine fix is all package maintainers repackage all Ubuntu raw thumbnailers to support the current gnome desktop method of producing thumbnails.