On Mon, Mar 05, 2012 at 07:10:22AM +0100, Hans Petter Selasky wrote:
> On Monday 05 March 2012 05:17:59 Alexey Dokuchaev wrote:
> > On Sat, Mar 03, 2012 at 09:11:29AM +0100, Hans Petter Selasky wrote:
> > > On Friday 02 March 2012 20:25:32 Jung-uk Kim wrote:
> > > > Try the attached patch.  At least, it fixed my problem.
> > > 
> > > I've committed your patch with some minor modifications.
> > > 
> > > http://svn.freebsd.org/changeset/base/232448
> > 
> > Unfortunately, it does not fix resume for me; and hw.usb.no_shutdown_wait
> > flipping did not make any difference either.  Any other ideas?
> > Particularly, I'm curious why disabling all USB modules still does not
> > allow this laptop to resume.  What are USB debugging techniques?
> 
> USB debugging:
> 
> Have "options USB_DEBUG" in kernel config. Then set xxx.debug = 15 under 
> hw.usb, typically hw.usb.uhub.debug=15

Today I've csupped to latest RELENG_8 (hoping that maybe the problem was
fixed during last few months), rebuilt the kernel with USB_DEBUG option.

After fresh reboot, the following snippet releately pop up on the console
(hand-copied):

  usb_needs_explore:
  usb_bus_powerd: bus=0xc55cccf0                <-- bus= number changes
  usb_bus_powerd: Recomputing power masks
  uhub_explore: udev=0xc5647400 addr=1          <-- udev= number changes
  uhub_read_port_status: port 1, wPortStatus=0x0100, wPortChange=0x0000, 
err=USB_ERR_NORMAL_COMPLETION
  uhub_read_port_status: port 2, wPortStatus=0x0100, wPortChange=0x0000, 
err=USB_ERR_NORMAL_COMPLETION

(USB<->CRC32 has plugged in, no other USB devices)

Aroung zzz(8) time (keyboard die upon wake-up as described earlier with
100% CPU load -- fans are at full burst) debug mode yielded these:

  uhub_child_pnpinfo_string: device not on bub
  uhub_child_location_string: device not on bub
  uhub_child_pnpinfo_string: device not on bub
  usb_bus_powerd: bus=0xc55e2c78
  usb_bus_powerd: Recomputing power masks
  uhub_read_port_status: port 1, wPortStatus=0x0500, wPortChange=0x0000, err=USB
  uhub_read_port_status: port 2, wPortStatus=0x0500, wPortChange=0x0000, err=USB
  ... up to port 8 ...
  uhub_read_port_status: port 8, wPortStatus=0x0500, wPortChange=0x0000, err=USB
  << usual "(disconnected)" messages >>
  usb_buf_port_set_device: bus 0xc55cccf0 devices[2] = 0
  usb_needs_explore:
  usb_needs_explore:
  usb_needs_explore:
  usb_needs_explore:
  usb_needs_explore:
  uhub0: <Intel EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus4
  uhub0: <Intel UHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus1
        ... UHCI also found on usbus 2, 3, 0 (in that order)
  uhub_attach: depth=0 selfpowered=1, parent=0, parent->selfpowered=0
  uhub_attach: Getting HUB descriptior
  uhub_attach: turn on port 1 power
  uhub_attach: turn on port 1 power
  uhub_attach: turn on port 1 power
  uhub_attach: turn on port 1 power
  uhub_attach: turn on port 1 power
  uhub_attach: turn on port 2 power
  uhub_attach: turn on port 2 power
  uhub_attach: turn on port 2 power
  uhub_attach: turn on port 2 power
  uhub1: 2 ports with 2 removable, self powered
        ... usb_needs_explore: loop quoted above repeats; system unusable

Any ideas?

./danfe
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