<html><head></head><body>Michael, I found a curious thing: I did change /etc/bumblebee/bumbleebee.conf from no idea - current to nvidia-331 but I did not Un - blacklist the 331 driver in the etc modprobe.d folder. I don't think I have any other nvidia driver installed. Question is why did option work with these configuration files? Any idea? <div class="gmail_quote">On April 29, 2014 5:04:00 PM CDT, Michael Lueck <mlueck@lueckdatasystems.com> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <pre class="k9mail">Greetings Lutz, You could +1 subscribe to a bug I opened against this area of concern about Xubuntu: "Nvidia Optimus + bumblebee configuration not optimized by default" <a href="https://bugs.launchpad.net/bugs/1280613">https://bugs.launchpad.net/bugs/1280613</a> In other words, "Me too". I am looking for good Nvidia graphics performance for a mostly docked notebook configuration. I am thankful, </pre></blockquote></div> -- Sent from my Android device with K-9 Mail. Please excuse my brevity.</body></html>