Comment 12 for bug 1269883

> gouri, thank you for providing the requested information. Could you please test the latest mainline kernel (not 3.12-rc7) via http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-trusty/ and advise if this is reproducible?

Hello again Christopher,

* Short answer

Reproduced with 3.13.0 from URL above.
Plugged 8 times in a USB3 port. First time yield a success log, others yielded a failure log.

Interesting fact : I noticed that when device works in a USB3 port it is recognized in kernel log as "high-speed" instead of "SuperSpeed". It already happened as you can see in bug description, look for "Jan 16 18:27:45".
So, it may be that the device actually never works when correctly recognized as SuperSpeed, but works in a USB3 port only when "by accident" it is only recognized as "high speed" (USB2) ?

Regards,

* Long answer

I used a 3.12 because I aimed at the latest saucy kernel (and got it wrong, rc7 is not the latest, but anyway).

I did this :

wget -S http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-trusty/linux-headers-3.13.0-031300-generic_3.13.0-031300.201401192235_amd64.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-trusty/linux-image-3.13.0-031300-generic_3.13.0-031300.201401192235_amd64.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.13-trusty/linux-headers-3.13.0-031300_3.13.0-031300.201401192235_all.deb

sudo dpkg --install linux-headers-3.13.0-031300_3.13.0-031300.201401192235_all.deb linux-headers-3.13.0-031300-generic_3.13.0-031300.201401192235_amd64.deb linux-image-3.13.0-031300-generic_3.13.0-031300.201401192235_amd64.deb

reboot

login

Apport (or whoopsie ?) told me bbswitch failed, and indeed bumblebee was not active, with usual results (machine heats and makes a loud fan noise).

tail -f /var/log/kern.log

I plugged device, wait for a few seconds, see behavior, unplug the device.

Rest is in short answer.