Bug 85835

Summary: [PNV Bisected]system boot fails
Product: DRI Reporter: lu hua <huax.lu>
Component: DRM/IntelAssignee: Daniel Vetter <daniel>
Status: CLOSED FIXED QA Contact: Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity: blocker    
Priority: highest CC: intel-gfx-bugs
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description lu hua 2014-11-04 06:39:45 UTC 
==System Environment==
--------------------------
Regression: Yes

Non-working platforms: PNV

==kernel==
--------------------------
drm-intel-nightly/782bafb46cc12737b16e5007583bd7b534c6202a

==Bug detailed description==
-----------------------------
System boot fails on PNV with -nightly and -queued kernel. It doesn't happen on -fixes kernel.

Bisect shows:7b7071a8b12a89f13888009ca176bab25c404290 is the first bad commit.
commit 7b7071a8b12a89f13888009ca176bab25c404290
Author:     Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
AuthorDate: Wed Oct 29 11:32:36 2014 +0200
Commit:     Daniel Vetter <daniel.vetter@ffwll.ch>
CommitDate: Mon Nov 3 15:46:28 2014 +0100

    drm/i915: Covert remaining platforms to choose DPLLS before disabling CRTCs

    Use the infrastructure added in a previous patch to choose shared DPLLs
    and calculate clocks before touching the hardware.

    v2: Don't set mode_set hooks since dev_priv is kzalloc()'d (Ville)

    Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
    Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

==Reproduce steps==
---------------------------- 
1. clean boot system
Comment 1 Daniel Vetter 2014-11-14 09:27:32 UTC 
commit ceb7ee9ff7b5245d46e716eeb33d769846395dae
Author: Bob Paauwe <bob.j.paauwe@intel.com>
Date:   Tue Nov 11 09:29:18 2014 -0800

    drm/i915: Use correct pipe config to update pll dividers. V2
Comment 2 lu hua 2014-11-17 01:16:08 UTC 
I found system boot successfully with latest -nightly kernel, but it still boot fail with -next-queued kernel.
Comment 3 Daniel Vetter 2014-11-18 10:09:37 UTC 
(In reply to lu hua from comment #2)
> I found system boot successfully with latest -nightly kernel, but it still
> boot fail with -next-queued kernel.

That's ok.
Comment 4 Daniel Vetter 2014-11-18 10:10:12 UTC 
Please only reopen if -nightly fails and mark as VERIFIED if -nightly works now.
Comment 5 Yi Sun 2014-11-19 05:29:34 UTC 
Verified. PNV can boot successfully on latest -nightly Kernel.
Comment 6 Jari Tahvanainen 2017-02-10 08:55:01 UTC 
Closing (>2 years) old Verified+Fixed.

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