Messages in this thread Patch in this message | | | Subject | Re: v4.14/v4.15-rc1: deferred setup in drm/fb-helper breaks entering pc3 | From | Maarten Lankhorst <> | Date | Tue, 28 Nov 2017 10:48:32 +0100 |
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Op 28-11-17 om 10:30 schreef Thomas Voegtle: > On Tue, 28 Nov 2017, Maarten Lankhorst wrote: > >> Op 27-11-17 om 19:09 schreef Thomas Voegtle: >>> >>> 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 >>> >> Could you send some logs with drm.debug=0x1f ? >> >> ~Maarten > > dmesg attached.
Does this work? A log of a working config (4.14 or with revert) would be nice regardless. :)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 07374008f146..6d71ced16f6e 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -1809,6 +1809,7 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { DRM_INFO("Cannot find any crtc or sizes\n"); + restore_fbdev_mode(fb_helper); return -EAGAIN; }
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