CC-ing Mathias. On Mon, 12 May 2014, Jorge wrote: > [1.] One line summary of the problem: > [Sony VAIO SVT13136CXS] usb2 port does not work. > > [2.] Full description of the problem/report: > My laptop has two usb ports, one 2.0 and the other 3.0. The usb 2.0 port > does nothing. It seems to have power (a mp3 player took charge, but a > cellphone did not) but shows no activity otherwise. Whatever I plug in > it nothing happens. Nothing in dmesg, nor anything changes in lsusb. > I've tried wireless mouse, pendrive, hdd, couple cellphones, and webcams. > The laptop is a Sony VAIO T13. It's a "ultrabook", with everything Intel > inside. ... > Launchpad bug report: > https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1316897 and a > previous one: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1172908 . > I found this post claiming a fix (involves editing > drivers/usb/host/pci-quirks.c): > http://community.sony.com/t5/VAIO-Software-Other-Operating/Vaio-T13-usb-2-0-don-t-work-under-ubuntu/td-p/120323 Mathis, that fix involves getting rid of the call that transfers control of the USB-2 ports from EHCI to xHCI. Apparently this laptop does not wire its USB-2 port to the xHCI controller. It looks like a quirk flag will be needed to fix this. Alan Stern -- 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
