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  1. Bug #1265544
  2. Comment #49

Comment 49 for bug 1265544

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Joseph Salisbury (jsalisbury) wrote :

The "Reverse" bisect confirmed the following commit is the fix for this bug:

commit c26fe8e5eb34c18aa9ab60fcf4c3150663a52306
Author: Paulo Zanoni <email address hidden>
Date: Fri Dec 6 17:32:41 2013 -0200

    drm/i915: don't touch the VDD when disabling the panel

    I don't see a reason to touch VDD when we're disabling the panel:
    since the panel is enabled, we don't need VDD. This saves a few sleep
    calls from the vdd_on and vdd_off functions at every modeset.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=69693
    Reviewed-by: Rodrigo Vivi <email address hidden>
    Signed-off-by: Paulo Zanoni <email address hidden>
    Signed-off-by: Daniel Vetter <email address hidden>

I'll see if I can cherry-pick this into Trusty and build a test kernel.