Bug 82750

Summary: [BDW Bisected]Screen is frozen since kernel boot.
Product: DRI Reporter: liulei <lei.a.liu>
Component: DRM/IntelAssignee: Rodrigo Vivi <rodrigo.vivi>
Status: CLOSED DUPLICATE QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: critical    
Priority: high CC: huax.lu, intel-gfx-bugs
Version: unspecified   
Hardware: Other   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
dmesg
none
Frozen screen none

Description liulei 2014-08-18 07:54:57 UTC 
Created attachment 104800 [details]
dmesg

==System Environment==
--------------------------
Regression: Yes. Good commit:82e3b8c130f046b7dd1e7898c10e40edb52fee6d
Non-working platforms: Broadwell

==kernel==
--------------------------
-nightly: 186631131a9289dad22f51315d78b9b6ac5b425f (failed)
    drm-intel-nightly: 2014y-08m-15d-14h-55m-27s integration manifest
-queued: ecca3fd0ea82c45b558f68b1ff3bf6685b443ab1 (failed)
    drm/i915/bdw: Enable Logical Ring Contexts (hence, Execlists)
-fixes: 103ae732ad26141515f109c80b5c1ced16e457c3 (worked)
    drm/i915: Don't try to enable cursor from setplane when crtc is disabled

==Bug detailed description==
-----------------------------
Screen frozen as picture attached. testdisplay -i can't detect eDP monitor.

==Reproduce steps==
---------------------------- 
1. boot machine up

==Bisect results==
Bisect shows: ecca3fd0ea82c45b558f68b1ff3bf6685b443ab1 is the first bad commit
commit ecca3fd0ea82c45b558f68b1ff3bf6685b443ab1
Author:     Oscar Mateo <oscar.mateo@intel.com>
AuthorDate: Thu Jul 24 17:04:49 2014 +0100
Commit:     Daniel Vetter <daniel.vetter@ffwll.ch>
CommitDate: Fri Aug 15 14:48:25 2014 +0200

    drm/i915/bdw: Enable Logical Ring Contexts (hence, Execlists)

    The time has come, the Walrus said, to talk of many things.
Comment 1 liulei 2014-08-18 07:59:35 UTC 
Created attachment 104802 [details]
Frozen screen
Comment 2 Chris Wilson 2014-08-18 08:08:20 UTC 
Check your kernel config. I had similar issue on snb where I had to refresh the .config to get past unpacking the initramfs.
Comment 3 Jani Nikula 2014-08-18 08:41:21 UTC 

*** This bug has been marked as a duplicate of bug 82740 ***
Comment 4 liulei 2014-08-18 08:44:14 UTC 
(In reply to comment #2)
> Check your kernel config. I had similar issue on snb where I had to refresh
> the .config to get past unpacking the initramfs.
Yes, if I set kernel config "CONFIG_FB_EFI=y". I can kicked this issue out, but I will run into Bug 81140. What need I do for digging this issue out?

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