Hi,
I'm not sure if the problem is similar, I've just tried LyX 2.3.4 on Ubuntu 20.04.1, and noticed that after inserting a
PDF file/graphics, LyX has problems in converting the image into PNG, as needed to show the preview on-screen.
One way I could work around it, was to comment out the PDF rule/filter in the
security policy coming with ImageMagick 6:
(not understanding yet the full implications of this, though)
tommaso@laptom$ grep PDF /etc/ImageMagick-6/policy.xml
<!-- <policy domain="module" rights="none" pattern="{PS,PDF,XPS}" /> -->
<!-- <policy domain="coder" rights="none" pattern="PDF" /> -->
Now, the question I wanted to ask is: when reconfiguring LyX looking for existence of the various converters, would it
make sense for LyX to have a means to try the converters one by one (at least a known subset of them), to be sure they
work and they've not been forbidden, so to exclude those ones that don't actually work ?
Or, is there some other way to handle the problem in a user-friendly way ?
FYI, the user perception of the issue shows up like this:
tommaso@laptom$ lyx placement.lyx
convert-im6.q16: attempt to perform an operation not allowed by the security policy `PS' @
error/constitute.c/IsCoderAuthorized/408.
convert-im6.q16: no images defined `/tmp/lyx_tmpdir.pPGlFCzHmrqd/gconvertDiWwGs.png' @
error/convert.c/ConvertImageCommand/3258.
and, in LyX, the generic error on the image "spot" saying "cannot convert".
Thanks,
T.
On 03/07/19 15:43, Cor Blom wrote:
Dear LyX devs,
Because of the following bug
https://bugzilla.opensuse.org/show_bug.cgi?id=1139928
I have become aware of the strict security settings in openSUSE which limits capabilities of ImageMagick. There is an
alternative setting that the user can activate, but most users will not know this.
I am just writing this, so you are aware of this. I don't know a solution.
Regards,
Cor
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