Bug 93517

Summary:

Laptop black screen [drm:intel_dp_start_link_train [i915]] *ERROR* failed to train DP, aborting

Product:

DRI

Reporter:

Jeronimo Martinez <jeroko>

Component:

DRM/Intel

Assignee:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Status:

CLOSED FIXED

QA Contact:

Intel GFX Bugs mailing list <intel-gfx-bugs>

Severity:

major

Priority:

medium

CC:

intel-gfx-bugs

Version:

DRI git

Hardware:

x86-64 (AMD64)

OS:

Linux (All)

Whiteboard:

i915 platform:

BDW

i915 features:

display/DP

Attachments:

Description	Flags
dmesg(dmr.debug=0xe)	none

Description Jeronimo Martinez 2015-12-27 20:11:08 UTC

Created attachment 120710 [details]
dmesg(dmr.debug=0xe)

I'm using the kernel from drm-intel-nightly branch on the 2015-12-19, with the i915.fastboot=1 module parameter (otherwise I get bug 92878). The 4K laptop display shows some tearing, but it's functional. Sometimes there is a random hotplug event ([drm:intel_get_hpd_pins] hotplug event received), then it goes into training and the display goes black, I can't get it back unless I reboot the laptop. I didn't plug or do anything to trigger that hotplug event.

Comment 1 anusha 2016-06-27 18:51:10 UTC

Can you please give me your hardware configuration? Which monitor are you using? Are you using any adaptors etc.

Comment 2 Elio 2016-06-28 20:45:11 UTC

I was trying to reproduce this issue over a BDW platform with the following configuration:

4k Display through MiniDP connection.

Ubuntu 16.04, components:

++ Date : jun-WW24-01-11:31:29 

 --> Component : drm 
	 url : http://cgit.freedesktop.org/mesa/drm 
	 tag : libdrm-2.4.68 
	 commit : fc09c5a 
	 author : Kenneth Graunke <kenneth@whitecape.org> 
	 age : 6 weeks ago 
 --> Component : mesa 
	 url : http://cgit.freedesktop.org/mesa/mesa 
	 tag : mesa-11.2.2 
	 commit : 3a9f628 
	 author : Emil Velikov <emil.velikov@collabora.com> 
	 age : 4 weeks ago 
 --> Component : xf86-video-intel 
	 url : http://cgit.freedesktop.org/xorg/driver/xf86-video-intel 
	 tag : 2.99.917 
	 commit : baec802 
	 author : Chris Wilson <chris@chris-wilson.co.uk> 
	 age : 1 year 6 months ago 
 --> Component : libva 
	 url : http://cgit.freedesktop.org/libva/ 
	 tag : libva-1.7.1.pre1 
	 commit : 453876f 
	 author : Xiang Haihao <haihao.xiang@intel.com> 
	 age : 4 days ago 
 --> Component : vaapi (intel-driver) 
	 url : http://cgit.freedesktop.org/vaapi/intel-driver 
	 tag : 1.7.1.pre1 
	 commit : 2975480 
	 author : Xiang Haihao <haihao.xiang@intel.com> 
	 age : 4 days ago 
 --> Component : cairo 
	 url : http://cgit.freedesktop.org/cairo 
	 tag : 1.15.2 
	 commit : db8a7f1 
	 author : Bryce Harrington <bryce@osg.samsung.com> 
	 age : 6 months ago 
 --> Component : xserver 
	 url :  http://cgit.freedesktop.org/xorg/xserver 
	 tag : xorg-server-1.18.3 
	 commit : 9454cd5 
	 author : Adam Jackson <ajax@redhat.com> 
	 age : 9 weeks ago 
 --> Component : intel-gpu-tools 
	 url : http://cgit.freedesktop.org/xorg/app/intel-gpu-tools 
	 tag : intel-gpu-tools-1.15 
	 commit : 3ce58b6 
	 author : Marius Vlad <marius.c.vlad@intel.com> 
	 age : 6 days ago 


Kernel 4.7 nightly from:

http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-intel-nightly/2016-06-28-yakkety/

I was not able to reproduce the bug, 

Please confirm at your side.

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