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Date: Fri, 16 Jan 2015 10:00:11 -0800
From: Sean Bruno <sbruno@ignoranthack.me>
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To: freebsd-usb@freebsd.org
Subject: USB 3 strange behavior, lenovo x240
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I'm seeing strange behavior when I enable USB 3 support on my laptop. 
Running head @r276878:

Disabling USB 3 makes things behave "better" in that my wireless device
will actually serve traffic and /dev/video0 will really exist when I
switch over.  Using USB 3 makes things behave erratically if at all.

Devices don't appear after a reboot and I'm seeing issues using my USB 2
devices.

 % usbconfig
ugen0.1: <XHCI root HUB 0x8086> at usbus0, cfg=0 md=HOST spd=SUPER
(5.0Gbps) pwr=SAVE (0mA)
ugen1.1: <EHCI root HUB Intel> at usbus1, cfg=0 md=HOST spd=HIGH
(480Mbps) pwr=SAVE (0mA)
ugen0.2: <802.11n NIC Realtek> at usbus0, cfg=0 md=HOST spd=HIGH
(480Mbps) pwr=ON (500mA)
ugen1.2: <product 0x8000 vendor 0x8087> at usbus1, cfg=0 md=HOST
spd=HIGH (480Mbps) pwr=SAVE (0mA)
ugen0.3: <Integrated Camera SunplusIT INC.> at usbus0, cfg=0 md=HOST
spd=HIGH (480Mbps) pwr=ON (500mA)


% pciconf -lv
xhci0@pci0:0:20:0:      class=0x0c0330 card=0x221417aa chip=0x9c318086
rev=0x04 hdr=0x00
    vendor     = 'Intel Corporation'
    device     = 'Lynx Point-LP USB xHCI HC'
    class      = serial bus
    subclass   = USB

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