SRU request for LP#249296

[Stefan Bader]

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https://bugs.launchpad.net/cmpc/+bug/249296

SRU justification:

Impact: After suspend the classmate PC will not reboot with any of the present
boot methods, however it will reboot using the ACPI method (although its ACPI
flags clearly deny this).

Fix: The fix backports the ability to use reboot=a on the commandline from
upstream. It adds dmi exception tables to let the classmate use this method
without checking the flags and sets this method as a default for it (also by
dmi matching). So impact for other machines is not expected, since the default
of using the keyboard controller remains.

Testcase: Reboot after suspend/resume on the classmate will hang without this,
otherwise succeed.

- --

When all other means of communication fail, try words!


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