[Bug 191137] Re: [Hardy] ACPI Embedded Controller (EC) stops boot when kernel boot 'quiet' option is enabled or AC power is connected

[Stefan Bader]

SRU justification:

Impact: On several Sony laptop models the changes introduced by upstream
commit c04209a7948b95e8c52084e8595e74e9428653d3 to enable the EC handler
during scan will cause those machines to hang on boot.

Fix: There was a work-around to remove the quiet option on boot but that
very much depended on timing and probably won't always work. There have
been two upstream patches identified to solve the issue. Patches
commited to Hardy as bdbcd262d8a378984716e3bc3bdbfd70841303ab and
40e55e8f3bb152df0e883dad572d263647f3c056.

Testcase: Boot a Hardy kernel on one of the affected laptops with the
quiet option active (default) and it will hang. With the fixes this
does not happen.


** Changed in: linux (Ubuntu)
       Status: In Progress => Fix Committed

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[Hardy] ACPI Embedded Controller (EC) stops boot when kernel boot 'quiet' option is enabled or AC power is connected
https://bugs.launchpad.net/bugs/191137
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