From: Thomas Voegtle <tv@lio96.de>
To: daniel.vetter@ffwll.ch
Cc: liviu@dudau.co.uk, john.stultz@linaro.org, treding@nvidia.com,
linux-kernel@vger.kernel.org, maarten.lankhorst@linux.intel.com
Subject: v4.14/v4.15-rc1: deferred setup in drm/fb-helper breaks entering pc3
Date: Mon, 27 Nov 2017 19:09:13 +0100 (CET) [thread overview]
Message-ID: <alpine.LSU.2.20.1711271859120.24103@er-systems.de> (raw)
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
next reply other threads:[~2017-11-27 18:18 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-27 18:09 Thomas Voegtle [this message]
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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