Bug 65700

Summary: [SNB]<3>[drm:ironlake_disable_pch_transcoder] *ERROR* failed to disable transcoder 0
Product: DRI Reporter: lu hua <huax.lu>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: xunx.fang, yangweix.shui
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg
none
dmesg with drm debug enabled none

Description lu hua 2013-06-13 08:20:38 UTC 
Created attachment 80758 [details]
dmesg

System Environment:
--------------------------
Platform: Sandybridge
Kernel:   drm-intel-fixes 76c4259a3ad6af9f4d63b5d3bcc8088844c0c59c

Bug detailed description:
-------------------------
It happens on sandybridge with -driq kernel and -fixes kernel.

I can't catch a good commit.

CPU:Intel(R) Core(TM) i5-2400S CPU @ 2.50GHz.

Boot system, run dmesg -r | egrep "<[1-4]>" |grep drm.
<4>[    1.179153] WARNING: at drivers/gpu/drm/i915/intel_display.c:979 ironlake_crtc_disable+0xbe/0x79b [i915]()
<4>[    1.179157] Modules linked in: i915(+) video button drm_kms_helper drm mperf freq_table
<4>[    1.179159] CPU: 1 PID: 1227 Comm: udevd Not tainted 3.10.0-rc5_drm-intel-fixes_76c425_20130613_+ #3879
<4>[    1.179231]  [<ffffffffa0013cc9>] ? drm_mode_set_config_internal+0x19/0x40 [drm]
<4>[    1.179234]  [<ffffffffa004ab8a>] ? drm_fb_helper_set_par+0x54/0x9a [drm_kms_helper]
<4>[    1.179235]  [<ffffffffa004ab36>] ? drm_fb_helper_initial_config+0x459/0x459 [drm_kms_helper]
<4>[    1.179254]  [<ffffffffa004aa87>] ? drm_fb_helper_initial_config+0x3aa/0x459 [drm_kms_helper]
<4>[    1.179258]  [<ffffffffa0012532>] ? drm_mode_config_reset+0xad/0xcc [drm]
<4>[    1.179279]  [<ffffffffa000e37d>] ? drm_get_minor+0x1b5/0x20a [drm]
<4>[    1.179284]  [<ffffffffa000fd2d>] ? drm_get_pci_dev+0x14d/0x254 [drm]
<3>[    1.231224] [drm:ironlake_disable_pch_transcoder] *ERROR* failed to disable transcoder 0

Reproduce steps:
----------------
1. boot system
2. dmesg -r | egrep "<[1-4]>" |grep drm
Comment 1 Daniel Vetter 2013-06-13 08:40:13 UTC 
dmesg doesn't have drm debug enabled. Please attach a new one, thanks.
Comment 2 lu hua 2013-06-13 08:59:02 UTC 
Created attachment 80765 [details]
dmesg with drm debug enabled
Comment 3 Chris Wilson 2013-07-17 11:53:55 UTC 
I don't see the WARN from disabling a disabled output; just two WARNs tracked elsewhere. If you do capture the original warning with debug enabled, we do very much want to see it.
Comment 4 lu hua 2015-05-13 07:50:52 UTC 
I don't meet this error on the latest drm-intel-nightly and drm-intel-fixes kernel. Close it.
Comment 5 Elizabeth 2017-10-06 14:45:55 UTC 
Closing old verified.

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