Further investigation of my backups shows that I never had a "jpeg-quality" setting in GNOME settings on this machine before ("HOME=/path/to/restored/homedir dconf dump /org/gnome/simple-scan/").
I do have jpeg-quality=75 on the old machine that was connected to the scanner until 5 years ago...
So it looks like there is a problem with the default value if the "jpeg-quality" setting does not exist (i.e. has never been changed and saved?).
However, data/org.gnome.SimpleScan.gschema.xml does show a suitable default:
<key name="jpeg-quality" type="i">
<range min="0" max="100"/>
<default>75</default>
<summary>Quality value to use for JPEG compression</summary>
<description>Quality value to use for JPEG compression.</description>
</key>
Further investigation of my backups shows that I never had a "jpeg-quality" setting in GNOME settings on this machine before ("HOME= /path/to/ restored/ homedir dconf dump /org/gnome/ simple- scan/") .
I do have jpeg-quality=75 on the old machine that was connected to the scanner until 5 years ago...
So it looks like there is a problem with the default value if the "jpeg-quality" setting does not exist (i.e. has never been changed and saved?).
src/app- window. vala: quality_ adjustment. value = settings.get_int ("jpeg-quality");
However, data/org. gnome.SimpleSca n.gschema. xml does show a suitable default:
<key name="jpeg-quality" type="i"> default> 75</default> summary> Quality value to use for JPEG compression< /summary> description> Quality value to use for JPEG compression. </description>
<range min="0" max="100"/>
<
<
<
</key>