I've recently started using f.lux and settled on this program for when
I'm using Linux. I ran into this and investigated  the issue a bit. It
appears that the problem is hostip.info simply isn't reliable. Geoclue
via hostip was working fine until my ability to reach the server ended.
I assume the problem lies with hostip server and when it cannot even
establish a connection geoclueinstantly fails rather than ping it on
some schedule.

For those wanting to use this program reliably without having to depend
on either geoclue OR gnome-clock as a location provider, I'd recommend
manual configuration. You can do this using the legacy manual lat/lon
command. Find your current location using another service such as
http://www.itouchmap.com/latlong.html. Some people above seemed confused
by the format for redshift's manual command, it follows standard +/-
notation where +latitude is north and - latitude is south and +
longitude is east while -longitude is west.

Command example:
redshift -t 6500:3400 -l 43.63:-79.33 &

The above command starts redshift with coordinates for Toronto area of
Canada, I have also provided new defaults for daytime/night color values
(same values as f.lux) with -t. The & makes the process execute in the
background.

Likely redshift should find a more reliable internet mechanism than
hostip.info for the future though it isn't really the programs fault.

As a final note, if you are like me and don't want to have to execute
that on each reboot. I'd advise putting that in a tiny script and having
it execute on startup via whatever startup manager/process your flavor
of Ubuntu uses.

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https://bugs.launchpad.net/bugs/868904

Title:
  Redshift fails to start with session due to geoclue failure

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