#10492 LOW F14: idle sleep/suspend fails when prettyboot is inactivated

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#10492: idle sleep/suspend fails when prettyboot is inactivated
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           Reporter:  mavrothal               |       Owner:  pgf                              
               Type:  defect                  |      Status:  new                              
           Priority:  low                     |   Milestone:  F14                              
          Component:  power manager (powerd)  |     Version:  Development build as of this date
         Resolution:                          |    Keywords:  os3, XO-1                        
        Next_action:  code                    |    Verified:  0                                
Deployment_affected:  none                    |   Blockedby:                                   
           Blocking:                          |  
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Changes (by pgf):

 * cc: cjb (added)
  * next_action:  reproduce => code


Comment:

 excellent, thanks.  it seems that /dev/tty1 is the culprit.  the modtime
 of a VT tty is bumped when that tty is read or written, and powerd checks
 the modtimes on /dev/tty1 and tty2 to see if it should stay awake.
 (search for "touchfiles" to see where this is done in powerd.)  clearly
 booting with the check key is causing the continuous traffic on tty1 to
 keep the system alive.

 is this behavior new with F14?  i.e., does it happen on 10.1.3, if booted
 with the check key?

 whether traffic on the VT consoles should keep the system alive or not is
 perhaps the real question.  this is legacy behavior -- it's how ohmd
 worked, i believe.  keystrokes will keep the screen alive if one is typing
 -- the question is whether VT output should also prevent suspend.  i
 suspect not, but defer to others.

-- 
Ticket URL: <http://dev.laptop.org/ticket/10492#comment:7>
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