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* v4.14/v4.15-rc1: deferred setup in drm/fb-helper breaks entering pc3
@ 2017-11-27 18:09 Thomas Voegtle
  2017-11-28  9:18 ` Maarten Lankhorst
  0 siblings, 1 reply; 9+ messages in thread
From: Thomas Voegtle @ 2017-11-27 18:09 UTC (permalink / raw)
  To: daniel.vetter
  Cc: liviu, john.stultz, treding, linux-kernel, maarten.lankhorst


Hello,

with v4.14 I recognized that my file server (headless haswell system)
doesn't enter packages pc3 anymore and only enters pc2 according to
powertop.
In v4.13 the system used pc2 and pc3.

So I bisected that down to:

ca91a2758fcef6635626993557dd51cfbb6dd134 is the first bad commit
commit ca91a2758fcef6635626993557dd51cfbb6dd134
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Thu Jul 6 15:00:21 2017 +0200

     drm/fb-helper: Support deferred setup


Reverting this commit on top of v4.14 and v4.15-rc1 fixes the problem and
the system uses package states pc2 and pc3 again.

Nothing is connected to the VGA and DVI port.
I'm using a kernel without modules on openSUSE 42.3.
I have no "vga=xxx" or something like that on the cmdline.


Thanks,

       Thomas

^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2017-11-29 14:40 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2017-11-27 18:09 v4.14/v4.15-rc1: deferred setup in drm/fb-helper breaks entering pc3 Thomas Voegtle
2017-11-28  9:18 ` Maarten Lankhorst
2017-11-28  9:30   ` Thomas Voegtle
2017-11-28  9:48     ` Maarten Lankhorst
2017-11-28 10:28       ` Thomas Voegtle
2017-11-28 11:16         ` [PATCH] drm/fb_helper: Disable all crtc's when initial setup fails Maarten Lankhorst
2017-11-28 11:49           ` Daniel Vetter
2017-11-28 15:13             ` Thomas Voegtle
2017-11-29 14:40               ` Maarten Lankhorst

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