#12924 NORM Not Tri: hang on shutdown, black screen

[Zarro Boogs per Child]

#12924: hang on shutdown, black screen
---------------------------+--------------------------------------
     Reporter:  Quozl      |                 Owner:
         Type:  defect     |                Status:  new
     Priority:  normal     |             Milestone:  Not Triaged
    Component:  kernel     |               Version:  not specified
     Keywords:             |            Blocked By:
     Blocking:             |  Deployments affected:
Action Needed:  never set  |              Verified:  0
---------------------------+--------------------------------------
 SKU322 with a Fedora 20 build may hang on shutdown or power off, with a
 black screen (backlight off, no pixel data shown), and power LED on.

 Occurs about one out of 300 attempts.

 Kernel messages show;

 {{{
 [   52.747955] Disabling non-boot CPUs ...
 [   52.762359] IRQ45 no l
 }}}

 Sometimes the "l" is missing, but the trailing space is present.

 Normal output is;

 {{{
 [   54.006469] Disabling non-boot CPUs ...
 [   54.010772] IRQ45 no longer affine to CPU1
 [   54.012817] CPU1: shutdown
 [   54.012847] CPU1: shutdown
 [   54.023956] Restarting system.
 }}}

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Ticket URL: <http://dev.laptop.org/ticket/12924>
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