Hi, I'll do my best - if you want more information, or I am unclear please let me know. I've been using Ubuntu (and Debian derived distros for about 10 years - so hopefully I'm slightly helpful). I have noticed that on Ubuntu 15.10 (on a new System76 Lemur laptop - which I believe is ACER based), and is Intel board based, that the USB 3 ports are only operational if a USB 2 device is plugged into them. If I plug a USB 3 device (thumbdrive, external HDD, any (manufacturers) USB 3 device into the laptop's USB 3 port (I have two and behaviour is the same for both) the device is not recognised. Using lsusb verifies the non-recognition of the USB 3 devices. USB 2 devices work as expected on the laptop's USB 3 ports (as well as the laptop's single USB 2 port). How can I help & what do you need from me to help isolate the issue. Regards, Andor On Thu, 2015-12-17 at 11:04 +0200, Mathias Nyman wrote: > On 16.12.2015 17:51, Andor J Kiss wrote: > > Hello Mathias, > > > > I've noticed that in Ubuntu (and some other Debian distributions, > > not sure about Debian itself) that USB 3 to USB 3 doesn't work > > (USB3 port to USB2 thumbdrive okay, USB3 thumbdrive to USB3 port > > OK). > > > > I'm using Ubuntu 15.10 (4.2.0-21-generic) and UEFI boot. I'm > > wondering if there's any way I can contribute to fixing, or help > > fixing this bug. Or, might you point me to a bug report that has > > been filed and maybe this has already been fixed upstream? > > > > Thanks, > > Andor > > Hi > > I'm not sure I understand the issue here, > Could you explain in more detail what is not working? > > What is connected and where? > > -Mathias > > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html