#4476 BLOC Update.: Possible USB problem

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#4476: Possible USB problem
-----------------------+----------------------------------------------------
  Reporter:  carrano   |       Owner:  wad     
      Type:  defect    |      Status:  reopened
  Priority:  blocker   |   Milestone:  Update.1
 Component:  hardware  |     Version:          
Resolution:            |    Keywords:          
  Verified:  0         |  
-----------------------+----------------------------------------------------

Comment(by jcardona):

 I reproduced this problem on:

 {{{
 build: joyride-251
 kernel:
 http://dev.laptop.org/~dilinger/stable/kernel-2.6.22-20071106.1.olpc.392edb0680e0d8a.i586.rpm
 xo: non-ECO'd B4
 }}}

 A good test to characterize this bug:

 {{{
 # echo 0x00020000 > /sys/module/libertas/parameters/libertas_debug
 #echo 9 > /proc/sysrq-trigger
 }}}

 produces this output:

 {{{
 [78928.116648] usb8xxx usbd: 1-1:usb_submit_urb failed
 [78928.116666] usb8xxx usbd: 1-1:*** type = 1
 [78928.116684] usb8xxx usbd: 1-1:size after = 204
 [78928.116702] usb8xxx usbd: 1-1:usb_submit_urb failed
 [78928.116720] usb8xxx usbd: 1-1:*** type = 1
 [78928.116737] usb8xxx usbd: 1-1:size after = 204
 [78928.116755] usb8xxx usbd: 1-1:usb_submit_urb failed
 [78928.116774] usb8xxx usbd: 1-1:*** type = 1
 [78928.116791] usb8xxx usbd: 1-1:size after = 204
 ...
 }}}

 I had two xo's with identical software, one of them "ECO'd to C2 circuitry
 10/07/07".  Only the non-ECO'd xo failed (after 7 hours).

-- 
Ticket URL: <http://dev.laptop.org/ticket/4476#comment:13>
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