USB devices sometimes not seen at boot time

[Matthias Apitz]

El día jueves, junio 29, 2017 a las 11:26:48p. m. +0200, Hans Petter Selasky escribió:

> > # egrep 'uhub|ugen' dmesg-20170628-202601-good.txt
> > ugen0.1: <0x8086 XHCI root HUB> at usbus0
> > ugen1.1: <Intel EHCI root HUB> at usbus1
> > uhub0: <0x8086 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
> > uhub1: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
> > uhub0: 13 ports with 13 removable, self powered
> > uhub1: 2 ports with 2 removable, self powered
> > ugen0.2: <Identiv uTrust 3512 SAM slot Token> at usbus0
> > ugen0.3: <SunplusIT Inc HD WebCam> at usbus0
> > ugen0.4: <vendor 0x0489 product 0xe056> at usbus0
> > 
> > and this is from a bad one:
> > 
> > # egrep 'uhub|ugen' dmesg-20170628-202351-bad.txt
> > ugen1.1: <Intel EHCI root HUB> at usbus1
> > ugen0.1: <0x8086 XHCI root HUB> at usbus0
> > uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
> > uhub1: <0x8086 XHCI root HUB, class 9/0, rev 3.00/1.00, addr 1> on usbus0
> > uhub1: 13 ports with 13 removable, self powered
> > uhub0: 2 ports with 2 removable, self powered
> > ugen1.2: <vendor 0x8087 product 0x8000> at usbus1
> > uhub2 on uhub0
> > uhub2: <vendor 0x8087 product 0x8000, class 9/0, rev 2.00/0.04, addr 2> on usbus1
> > uhub2: 8 ports with 8 removable, self powered
> > 
> > The device in question it the "Identiv uTrust 3512 SAM slot Token" and
> > the rule is: When XHCI is probed as ugen0.1 and later as uhub0, all is
> > fine; else it fails.
> > 
> > Any ideas on this?  What makes the boot differ in this order?
> > 
> 
> Hi,
> 
> USB explores different root HUBs ugen0.1, ugenX.1 and so on in parallell 
> and not serial. Maybe a race or electrical issue is causing the order to 
> fail. You can try compiling a kernel without USB support and loading 
> xhci, ehci, ohci and uhci by a script using kldload. Alternate the 
> loading order.

Hi,

Thanks for the hint. I disabled the three entries for uhci, ohci and ehci:

# USB support
options         USB_DEBUG               # enable debug msgs
# device                uhci            # UHCI PCI->USB interface
# device                ohci            # OHCI PCI->USB interface
# device                ehci            # EHCI PCI->USB interface (USB 2.0)
device          xhci                    # XHCI PCI->USB interface (USB 3.0)
device          usb                     # USB Bus (required)
device          ukbd                    # Keyboard
device          umass                   # Disks/Mass storage - Requires scbus and da

and maybe this will help already. I will let you know and update the PR
later the day.

	matthias

-- 
Matthias Apitz, ✉ guru at unixarea.de, ⌂ http://www.unixarea.de/  ☎ +49-176-38902045
Public GnuPG key: http://www.unixarea.de/key.pub
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