#9128 HIGH 9.1.0: 2595 suspend causes my hub-attached USB devices to stop functioning

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#9128: 2595 suspend causes my hub-attached USB devices to stop functioning
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           Reporter:  mikus      |       Owner:  dsaxena                          
               Type:  defect     |      Status:  assigned                         
           Priority:  high       |   Milestone:  9.1.0                            
          Component:  kernel     |     Version:  Development build as of this date
         Resolution:             |    Keywords:                                   
        Next_action:  reproduce  |    Verified:  0                                
Deployment_affected:             |   Blockedby:                                   
           Blocking:  1, 9       |  
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Changes (by dsaxena):

  * status:  new => assigned
  * next_action:  never set => reproduce
 * cc: dsaxena (removed)
 * cc: cjb (added)
  * component:  power manager (OHM) => kernel
  * priority:  normal => high
  * owner:  cjb => dsaxena
  * blocking:  => 1, 9


Comment:

 Replying to [comment:3 cjb]:
 > This later dmesg has a set of low-level USB errors in it.
 >
 > Deepak, think CONFIG_USB_SUSPEND might be implicated here?  Can you
 reproduce anything like this?

 Is possible, but don't have access to a hub ATM so can't try to reproduce.
 Easy way to find out would be to bisect by running the pre-USB_SUSPEND
 kernel (build 2587). I won't have access to my HW again until I am working
 from home again next week.

 I'm 110% certain this is kernel as we are seeing "ehci_hcd 0000:00:0f.5:
 port 4 reset error -110" (110 = ETIMEDOUT), so going to take this one and
 also set it as a blocker for 9.1.0

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Ticket URL: <http://dev.laptop.org/ticket/9128#comment:4>
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