#10569 NORM 10.1.3: XO-1.5 blanks SISUSB external screen if power suspend requested then cancelled

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#10569: XO-1.5 blanks SISUSB external screen if power suspend requested then
cancelled
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 Reporter:  greenfeld        |                 Owner:  cjb                               
     Type:  defect           |                Status:  new                               
 Priority:  normal           |             Milestone:  10.1.3                            
Component:  x window system  |               Version:  Development source as of this date
 Keywords:                   |           Next_action:  diagnose                          
 Verified:  0                |   Deployment_affected:                                    
Blockedby:                   |              Blocking:                                    
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 An XO-1.5 blanks its SISUSB external screen display if the XO's power
 button is pressed to start a suspend then canceled by pressing a key on
 the keyboard.  No video is then displayed on the external screen until a
 workaround is performed.

  1. Attach a SISUSB VGA adapter to an XO-1.5 running 10.1.3 os360.
  2. Boot the laptop.  Wait until X windows starts and shows the display on
 the external adapter.
  3. Press the XO's power button.  The laptop will show its suspend/power
 off/wake-up graphical message.
  4. Quickly press any key on the keyboard to wake up the XO and avoid the
 suspend.

 Expected: Normal external display over the SISUSB adapter resumes.

 Actual: We get a blank screen on both the XO as well as on the external
 adapter.

 Workaround: If this happens, press Alt-F1 {neighborhood view} to get to a
 text console, then press Alt-F3 {list-of-applications/circle view} to
 restore the external X windows graphical display.

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Ticket URL: <http://dev.laptop.org/ticket/10569>
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