It is not a lightdm bug, the log said "Permission denied".
Could you provide the output of "sudo ls -l /home/bruce/Library/Graphics/Wallpapers/1440x900/_99.jpg" to me?
It is not a lightdm bug, the log said "Permission denied".
Could you provide the output of "sudo ls -l /home/bruce/ Library/ Graphics/ Wallpapers/ 1440x900/ _99.jpg" to me?