[Bug 1304805] Re: KDE desktop login failure: "Could not start d-bus. Can you call qdbus?"

[Carniolian]

Some details may have changed since April, but the problem remained.
After upgrading to Trusty yesterday, I got the same unpleasant message
with qdbus. In my /usr/bin/startkde file, the crucial line reads:

alias qdbus="QT_SELECT=qt4 qdbus"

After removing the quotes, KDE launched successfully, but this simply means that it actually works WITHOUT qdbus! Removing the quotes makes a substantial difference! Without quotes, the command alias:
 * sets qdbus to be expanded to QT_SELECT=qt4
 * lists the alias for qdbus
Thus, the program qdbus is no longer called. With quotes, however, the command qdbus first sets $QT_SELECT to qt4 and then calls the qdbus program. It would be probably more acceptable to write:

alias qdbus="QT_SELECT=qt4; qdbus"

Though I do not exactly know the role of qdbus, I suppose that KDE may
once crash when it really needs it. It may be a good idea to have it
anyway. After entering qdbus in the command line, I got the following
message:

qdbus: could not exec '/usr/lib/x86_64-linux-gnu/qt4/bin/qdbus': No such
file or directory

This all happened on my 64-bit computer. On the other hand, I have
another 32-bit computer, where there were no problems with qdbus. Thus,
I concluded that the qdbus library has been only written for the 32-bit
architecture. As a result, my solution is:

sudo mkdir /usr/lib/x86_64-linux-gnu/qt4/bin
sudo chmod a+rx /usr/lib/x86_64-linux-gnu/qt4/bin
sudo ln -s /usr/lib/i386-linux-gnu/qt4/bin/qdbus /usr/lib/x86_64-linux-gnu/qt4/bin/qdbus

At least in my case, it works!

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https://bugs.launchpad.net/bugs/1304805

Title:
  KDE desktop login failure: "Could not start d-bus. Can you call
  qdbus?"

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