[Nouveau] [Bug 66022] New: pwm1[_enable] faults after hibernate/restore related to automatic (or otherwise) fan management

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66022

          Priority: medium
            Bug ID: 66022
          Assignee: nouveau at lists.freedesktop.org
           Summary: pwm1[_enable] faults after hibernate/restore related
                    to automatic (or otherwise) fan management
        QA Contact: xorg-team at lists.x.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: mr.dash.four at googlemail.com
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: Driver/nouveau
           Product: xorg

This is a collection of 2 bugs, which I think are related (hence why I am
reporting them both here) as they both happen as a result of hibernate/restore:

1. After a hibernate/restore cycle, the fan management option (the value of
pwm1_enable) is not restored; and also 

2. After a hibernate/restore cycle, when automatic fan management is applied
("echo 2 > .../pwm1_enable"), this doesn't work - the nouveau driver takes the
fan speed to 2 and keeps it there *regardless* of the temperature of the video
card, which may cause the card to BURN OUT!

The kernel in use is 3.9.6 with the stock-supplied nvidia driver. For more
details please see https://bugzilla.redhat.com/show_bug.cgi?id=976658

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