#9350 HIGH 10.1.3: xrandr screen rotation support

[Zarro Boogs per Child]

#9350: xrandr screen rotation support
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           Reporter:  dsd              |       Owner:  jnettlet                         
               Type:  defect           |      Status:  assigned                         
           Priority:  high             |   Milestone:  10.1.3                           
          Component:  x window system  |     Version:  Development build as of this date
         Resolution:                   |    Keywords:                                   
        Next_action:  design           |    Verified:  0                                
Deployment_affected:                   |   Blockedby:                                   
           Blocking:  10229            |  
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Comment(by Quozl):

 Yes, power consumption should rise, and a test may be warranted to
 consider the impact of software rotate on a typical deployment.  I expect
 the CPU will be used more, and the delay before lowering clock frequency
 should be longer.  The hardware that performs the acceleration remains
 powered, and is thus a dead weight.  I've no idea of the impact order of
 magnitude.

 I don't think a DMM is required.  Current in microamps, and voltage in
 microvolts, is available from /sys when operating on battery, see
 /sys/devices/platform/olpc-battery.0/power_supply/olpc-
 battery/{current,voltage}_now ... and power could be calculated from that.
 /home/olpc/power-logs might also help.  The Physics activity, with no
 objects on screen, with power management disabled, causes continuous X
 server activity (25%), and so it might be a suitable test activity.

 I agree that a static screen should cost no different, but wouldn't be
 surprised if there was something else going on that I didn't know about.
 If power remains important, test it.

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Ticket URL: <http://dev.laptop.org/ticket/9350#comment:57>
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