ERROR: Settings schema 'org.gnome.SimpleScan' does not contain a key named 'brightness'

[Michael Nagel]

I grabbed the trunk today from bzr and built it on my Fedora 17 system. Reason? the version in the Fedora repos (simple-scan-3.4.1-1.fc17) is old and buggy.

I also grabbed the Fedora source RPM and looked at the .spec file to figure out build dependencies.

Then I built as per the README.md. The build seemed fine. But when I run it:

$ ./install/bin/simple-scan --debug
[+0.04s] DEBUG: simple-scan.vala:582: Starting Simple Scan 3.6.0, PID=12918
[+0.04s] DEBUG: Connecting to session manager
[+0.11s] WARNING: g_object_set_valist: invalid object type `GtkAdjustment' for value type `GtkWidget'
[+0.12s] ERROR: Settings schema 'org.gnome.SimpleScan' does not contain a key named 'brightness'
Trace/breakpoint trap (core dumped)

I don't know what that means. Where are these settings? Why are they indigestible? What should I do to make it work?

[Robert Ancell (robert-ancell)]

(Answered in the question)

[Dan S. (dan4launchpad)]

Similar issue building on Arch trying to follow the directions. For me (4 years later) it's missing 'page-delay'. What was the resolution to this bug? If it's a user config issue, what's missing? Thanks!

[Robert Ancell (robert-ancell)]

You need to set the XDG_DATA_DIRS environment variable to point to the updated schema. In the case above you would need:

$ XDG_DATA_DIRS=install/share:$XDG_DATA_DIRS ./install/bin/simple-scan

[Dan S. (dan4launchpad)]

Thank you, that works!

When I first tried building, I was running a command to `set` XDG_DATA_DIRS, which didn't work. For others' future reference, it will work if you `export` the variable.