When I ran my tests, I did notice that it had a little warning about the
fact that I was running on batteries, suggesting that it might be safer
to plug in.
You suggest removing the power manager. I had considered removing the
gnome-power-manager package, but I was under the *mistaken* impression
that it would also remove a whole list of other things because of
cascading dependencies. I tried again just now, and I see that apt
simply removes two packages: gnome-power-manager itself and also
"ubuntu-desktop", a meta-package that brings in all of the basic GNOME
stuff in a single sweep. This is to be expected, since I am removing
one of its dependencies.
So now I have removed the gnome-power-manager completely with no ill
effects. Thanks for the suggestion. Now I have two completely suitable
work-arounds ("sudo chmod -x /usr/bin/gnome-power-manager" and "sudo
apt-get remove gnome-power-manager"). Both of these solutions work for
me, because I am on a single-user machine, and so it's OK for me to make
my preferences global.
However, this bug report is not about "fixing my system" but about
making update-manager work better. So below, I will focus on that.
After removing g-p-m completely, I ran update-manager again. I was
surprised that it still gave me the "it's safer to connect the computer
to AC power before updating" message. So apparently it is smart enough
to figure that out even if gnome-power-manager is not running (or even
installed).
So the bottom line for this particular bug is that if you have gnome-
power-manager INSTALLED but it's not currently running, for whatever
reason, update-manager will run it for you. Note that on a multi-user
system, it might be perfectly normal for g-p-m to be installed, but
started by some users and not started by others. In fact, now I am
curious what would happen if a different user (say, my wife) were logged
in using a different desktop environment, something besides GNOME.
So I am not sure if having update-manager start up g-p-m is what one
would expect. In fact, the way that update-manager is currently
reporting my own battery/AC state even after I removed the g-p-m package
suggests that it might not be entirely necessary to query g-p-m at all.
Alan
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https://bugs.launchpad.net/bugs/714356
Title:
update-manager starts gnome-power-manager
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