Well, I think that we can rule out the proprietary Spotify client, as I haven't been able to use it recently because of a missing (deprecated) dependency. My current 15.04 installation is fairly new, as I returned to 14.04.2 for a while, but decided again to use the newest development version. I have to say that I don't see this bug that much often as I used to, I only came across it once throughout two weeks of everyday usage. I only had free software running then, available in the main repositories, namely Firefox, Nautilus, Terminal, qBittorrent. I started to close windows in this order: qBittorrent, Nautilus, Firefox. After closing Firefox, the performance was normal again. Note that I left the terminal window open.
I am using the recommended proprietary Nvidia drivers, and I am affected by an another bug (having thick black borders around GUI elements), which occurs after a sleep/resume cycle. I will do some experiments to find out whether this bug is also connected to suspending the system. That's all for now. I would like to offer some of my free time for further investigation, I will just need some tips on how to proceed. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1447570 Title: Unity suffers severe performance drops occasially To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1447570/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs