I figured I'd follow-up on this in case someone else had the same problem.
I had been using aptitude (on Ubuntu 12.04) to install libgtk-3-dev. It asked
me whether to accept a solution it offered regarding missing dependencies. I
was answering "Y". The problem is that solution meant removing the
ubuntu-desktop amongst many other things. The correct action would've been for
me to say 'n' and then wait for aptitude to offer another solution which
upgraded what needed to be upgraded without removing anything. Strangely,
apt-get offers the correct solution first. The second solution aptitude offered
was the correct one.
It might have been wise for me to do an "sudo aptitude upgrade" before
installing libgtk.
Anyway, as one guy pointed out to me, ultimately the user is responsible for
replying with a "Y" to aptitude's solutions. From now on, I will look very
carefully at solutions aptitude offers.
Dave
________________________________
From: David Buchan <pdbuc...@yahoo.com>
To: gtk-list list <gtk-list@gnome.org>
Sent: Friday, June 29, 2012 9:08 AM
Subject: libgtk-3-dev seems to break Ubuntu 12.04 LTS Unity Interface
Hi,
I've been using Ubuntu 10.04 and libgtk2.0-dev and glade for a long time and
recently attempted to bring myself into the present by doing a fresh install of
12.04 LTS.
But once I installed libgtk-3-dev and glade from the repository, I wasn't able
to log back into the computer unless I typed cntl-alt-F1 and went to TTY. The
graphical login screen accepts my credentials but then the screen very briefly
shows a broken pipe message at the top-left of a TTY screen and then the login
screen re-appears.
Scouring the web shows that many people have similar problems, but that there
are many possible causes. I tried a number of solutions and one that allows me
to get past the login while still in a graphical session, is to first go to TTY
and sudo aptitude install gnome-panel. The problem with this solution is that
Unity isn't rendered properly and is really unusable.
I *think* I saw that when I installed libgtk-3-dev, all kinds of gnome stuff is
removed. Anway, it was either libgtk-3-dev or glade, because that's all I
installed after the OS was installed.
I had tried going to a newer Ubuntu last year with the same results (maybe
different cause?), so I stayed with 10.04. What's really extraordinary, is that
last night I re-installed 10.04 when 12.04 failed as described above, and now
10.04 has the same problem (but with libgtk2.0-dev and glade)! Could it be that
those libgtk packages have recently been changed and broke the Ubuntu
interface? Seems unlikely.
Has anybody got suggestions and how to approach this? I saw some people talking
about lightdm versus gdm. I also tried that (uninstall lightdm, install gdm),
but *if* I recall (it was a late late night) although I got past login, Unity
was all buggered with that too.
Dave
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