#9702 BLOC 1.5-CTe: Linux (OS42) crashes on resume on an XO-1.5 B3

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#9702: Linux (OS42) crashes on resume on an XO-1.5 B3
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 Reporter:  wad      |                 Owner:  dsaxena      
     Type:  defect   |                Status:  new          
 Priority:  blocker  |             Milestone:  1.5-CTest    
Component:  kernel   |               Version:  not specified
 Keywords:           |           Next_action:  diagnose     
 Verified:  1        |   Deployment_affected:               
Blockedby:           |              Blocking:               
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 Using a fresh installation of OS42/Q3A16 on an XO-1.5 B3 prototype (#1A
 and another).  Boot, then type "echo mem > /sys/power/state".
 The system goes to sleep, the DCON keeps the image, the power LED starts
 blinking.

 Press the power button, and the screen changes (the Y position of the
 cursor changes), but the system is now locked up hard.

 On the serial port, we see that there was memory corruption, as only a
 "+r" was printed out.

 Suspend/resume works fine from OFW (although the image on the screen
 slowly decays), so I don't believe this is a hardware problem.  It sounds
 like something is accessing memory after it is supposed to, bringing the
 memory out of self-refresh right before the processor goes to sleep (and
 stops refreshing the memory).

 This behavior is not seen on B2 prototypes.

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Ticket URL: <http://dev.laptop.org/ticket/9702>
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