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I installed Trusty Tahr on my old Dell Studio 1537 a few hours ago. Since then I've been trying to install pipelight and failed miserably. I get the unmet dependencies problem as many people have before me. I've tried several suggestions that I've found both here and in other forums.

# Clean + -f install #
sudo apt-get clean
sudo apt-get -f install
sudo dpkg --configure -a
sudo apt-get -f install
# Output: 0 upgraded, 0 newly installed, 0 to remove, and 0 not upgraded.

I've also tried removing the repository and adding it again with no luck. I tried purging the repository then adding it again as suggested by this post and now terminal won't even find the package, much less try to install. I also tried installing aptitude as I've read that it may be able to install packages somewhat forcibly (also failed, because I also get unmet dependencies when trying to install aptitude). Lastly I also get unmet dependencies when trying to install gimp, which leads me to believe it might be a system problem instead of a package/dependency problem, so I went so far as to re-install the system from scratch with no luck. So far the only things I managed to install in the system are the firmware-b43-installer for the wireless (Broadcom BCM4312) card and ubuntu-restricted-extras.

So now, I'm looking for solutions that I haven't tried yet or something I might have missed. Any suggestions?

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  • In order to increase the chances of a helpful answer, please provide the 2 most important missing parts in the question: 1) What exact command was typed at first, and 2) What error message was seen (e.g. what unmet dependencies did you get?) expressions like "failed miserably" and "no luck" are not helpful and not a substitute for the actual facts. Similarly for "add the repository" (which one?) etc.
    – arielf
    Jan 3, 2016 at 2:33
  • After OS installation I installed the broadcom driver (sudo apt-get install firmware-b43-installer) and restricted extras (sudo apt-get install ubuntu-restricted-extras). Then I tried installing pipelight, with "sudo add-apt-repository ppa:pipelight/stable", and "sudo apt-get install pipelight-multi". I also tried using the command available at the pipelight main page "sudo apt-get install --install-recommends pipelight-multi". All attempts resulted in the error in first the link 'pipelight'.
    – Renata Dis
    Jan 3, 2016 at 12:25

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Okay, I don't know if this qualifies as an answer, but I re-installed the system one more time and third time was the charm. Pipelight installed this time. I still don't know why it didn't install before, but the problem got solved anyway, so thanks to everyone who at least took a look at this question. And thanks to arielf for trying to help me make clearer questions, I'll try to improve on that next time :)

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  • Glad you solved it yourself. That's the best way to learn. I suspect what happened here may have been the order of commands. For a totally new repo, (like ppa:pipelight/stable above), the repository needs to be added first, then an apt-get update is needed to update the index of packages, latest versions available, etc. Finally apt-get install <package_name> needs to be issued for the actual install. Adding new repositories is a relatively rare operation (and needs to be done only once per repo).
    – arielf
    Jan 4, 2016 at 19:07

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