Bug 91751

Summary: Display still active even though primary plane is disabled and kills the GPU
Product: DRI Reporter: Chris Wilson <chris>
Component: DRM/IntelAssignee: Intel GFX Bugs mailing list <intel-gfx-bugs>
Status: CLOSED WORKSFORME QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: normal    
Priority: medium CC: intel-gfx-bugs
Version: DRI git   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features: display/HDMI, GPU hang

Description Chris Wilson 2015-08-25 07:51:51 UTC 
CRTC info
---------
CRTC 21: pipe: A, active=yes (size=1600x1200)
	primary plane disabled
	encoder 31: type: TMDS-31, connectors:
		connector 32: type: HDMI-A-1, status: connected, mode:
		id 0:"1600x1200" freq 0 clock 0 hdisp 1600 hss 1664 hse 1856 htot 2160 vdisp 1200 vss 1201 vse 1204 vtot 1250 type 0x40 flags 0x0
	cursor visible? no, position (0, 0), size 0x0, addr 0x00000000, active? no
	underrun reporting: cpu=no pch=no 
CRTC 26: pipe: B, active=no (size=0x0)
	underrun reporting: cpu=no pch=no 

Connector info
--------------
connector 29: type VGA-1, status: disconnected
	modes:
connector 32: type HDMI-A-1, status: connected

and no mode set in x (i.e. HDMI1 connected but not enabled), I see lots of corruption on the HDMI display. In places it looks like PTE values, but inconsistent - possibly ringbuffers?
Comment 1 Chris Wilson 2015-08-25 18:45:07 UTC 
And for bonus points, it also results in GPU hangs.
Comment 3 yann 2016-04-26 14:53:31 UTC 
Chris, is this bug still occurring with latest kernel?
Comment 4 yann 2016-05-04 09:09:13 UTC 
Chris, I am closing this bug since no activity. Feel free to reopen if this is still occurring with latest kernel.
Comment 5 Chris Wilson 2016-05-04 09:15:07 UTC 
9 months and no one involved with atomic looked at the bug and then you closed it? Nor did anyone try to reproduce the issue. There really isn't much point in filing bugs, is there?
Comment 6 yann 2016-05-04 09:28:25 UTC 
Of course I am encouraging filling bug
but to have my team to try to reproduce the issue and get further, I will need a little bit more data, especially, steps to reproduce, HW to be used, your current software config ...
please reopen the bug with further details then.
thanks

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