[Trac #981] laptop sometimes boots without wireless interface present

[Zarro Boogs per Child]

#981: laptop sometimes boots without wireless interface present
----------------------+-----------------------------------------------------
 Reporter:  andrey    |       Owner:  mlj         
     Type:  defect    |      Status:  new         
 Priority:  normal    |   Milestone:  Untriaged   
Component:  hardware  |    Keywords:  usb wireless
----------------------+-----------------------------------------------------
 I've noticed a "boot without wireless" problem that has come up on both B1
 and B2 units but it can't be reproduced consistently and a hard reboot
 seems to resolve it:  the laptop will sometimes boot with the wireless
 interface missing.

 - "ifconfig -a" shows only the loopback interface (and any external USB
 interfaces we may have plugged in) and the usb8xxx module is of course not
 loaded
 - I don't see any mention of the 8388 device in dmesg and /sys, it looks
 like it's not present at all

 While this does not happen at every boot, it does seem to happen fairly
 often (I estimate one out of five boots on a particular B2 laptop).  Some
 laptops never do this, while two or three definitely do.  The build
 installed doesn't seem to be a factor and I suspect this may be a
 hardware-related issue.

 Attached are dmesg output from a "with wlan" (normal) boot and a "no wlan"
 boot.  The "no wlan" differs in that I see USB errors like these:

 {{{
 [   26.507554] Initializing USB Mass Storage driver...
 [   26.566319] usb 1-4: new high speed USB device using ehci_hcd and
 address 2
 [   26.716234] usb 1-4: device descriptor read/64, error -71
 [   26.976144] usb 1-4: device descriptor read/64, error -71
 [   27.236061] usb 1-4: new high speed USB device using ehci_hcd and
 address 3
 [   27.386003] usb 1-4: device descriptor read/64, error -71
 [   27.645913] usb 1-4: device descriptor read/64, error -71
 [   27.905839] usb 1-4: new high speed USB device using ehci_hcd and
 address 4
 [   28.355641] usb 1-4: device not accepting address 4, error -71
 [   28.505611] usb 1-4: new high speed USB device using ehci_hcd and
 address 5
 [   28.955433] usb 1-4: device not accepting address 5, error -71
 }}}

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Ticket URL: <http://dev.laptop.org/ticket/981>
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