#11286 NORM Not Tri: powerd should not suspend on open external serial devices

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#11286: powerd should not suspend on open external serial devices
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 Reporter:  greenfeld               |                 Owner:  pgf                              
     Type:  enhancement             |                Status:  new                              
 Priority:  normal                  |             Milestone:  Not Triaged                      
Component:  power manager (powerd)  |               Version:  Development build as of this date
 Keywords:                          |           Next_action:  diagnose                         
 Verified:  0                       |   Deployment_affected:                                   
Blockedby:                          |              Blocking:                                   
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 1. Attach a serial adapter (USB side) to an XO-1.5.
  2. Start Minicom as root and attach it to ttyUSB0.
  3. Let the XO go to into idle sleep after ~15 seconds; the serial adapter
 will detach from the USB port.
  4. Press a key to wake up the XO-1.5.  Minicom will show an error that it
 cannot open ttyUSB0, and dmesg will show the serial adapter now is
 allocated to ttyUSB1.
  5. Repeat 3 & 4 and the serial adapter will go back to ttyUSB0, and
 somehow Minicom (at least) figures out how to open it again.  Repeat again
 and it goes back to ttyUSB1...

 Workaround: Tell the XO-1.5 not to go sleep while using Minicom.

 Seen in 11.3.0 os7.

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Ticket URL: <http://dev.laptop.org/ticket/11286>
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