[Bug 90230] intel driver hangs in waitpid() for backlight helper process on output hotplug

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90230

Chris Wilson <chris at chris-wilson.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Chris Wilson <chris at chris-wilson.co.uk> ---
Ok, I had momentary doubts thinking this meant that your panel's output was
being destroyed and was worried. However, we unconditionally call
backlight_close() expecting it only to take action if a backlight is attached.

commit e7016d30f3a0ae817c77ccbd962f776ac3e7e100
Author: Olivier Fourdan <ofourdan at redhat.com>
Date:   Wed Apr 29 10:33:19 2015 +0100

    backlight: Do not hang forever if helper pid is -1

    Backlight helper PID is set to -1 by default, if for some reason it's
    not set, we may end up with waitpid(-1, ...) which will hang forever.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=90230
    Signed-off-by: Olivier Fourdan <ofourdan at redhat.com>

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