Please upgrade Ghostscript to 9.15 or later, if possible. Ghostscript 9.10 (the version in trusty) that we currently use fails on some PDF files (T110821: PDF file entirely rendered as a set of blank pages). I did not check in which version this problem was fixed, but 9.15 is definitely good and could possibly be backported from vivid?
|Open||None||T43371 Thumbnail/imagescaler (tracking)|
|Resolved||None||T50178 Error creating thumbnail: "Warning: File has insufficient data for an image."|
|Resolved||None||T110821 PDF file entirely rendered as a set of blank pages|
|Resolved||MoritzMuehlenhoff||T110849 Upgrade Ghostscript to 9.15 or later|
Doable, but not without a cost. Backported packages do not receive automatic security updates. Ghostscript has had severe security vulnerabilities before, including arbitrary code execution via specially-crafted files.
Is there any way of knowing how wide-spread T110821 is? Are there ways of working around it?
No idea, but it seems to affect specific files only (never seen it before this bug report). I submitted a patch to T110821 that will at least correctly produce an error message for the thumbnail instead of a broken image, that should allow us to at least see the error in some logs or such.