Bug 97394 - intel_dp_start_link_train failed to update link training (no monitor plugged in)
Summary: intel_dp_start_link_train failed to update link training (no monitor plugged in)
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: DRI git
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard: PatchMerged
Keywords:
Depends on:
Blocks:
 
Reported: 2016-08-18 14:17 UTC by twelve.eighty
Modified: 2017-07-27 16:55 UTC (History)
2 users (show)

See Also:
i915 platform: HSW
i915 features: display/DP

Attachments
dmesg-2016-AUG-18.txt (338.25 KB, text/plain)
2016-08-18 14:17 UTC, twelve.eighty 		no flags Details
View All

Description twelve.eighty 2016-08-18 14:17:40 UTC 
Created attachment 125878 [details]
dmesg-2016-AUG-18.txt

I'm running drm-intel-nightly with modesetting driver to (hopefully) help provide additional information, but this error has been occurring during boot on this laptop for all kernels since at least 4.4.

I've tried searching for solutions, but most of them seem around problems with having a monitor plugged in. However, I get this error 100% of the time while booting *without* a monitor plugged in.

First time reporting a bug here, so please let me know how I can help with more info - dmesg should be attached:

Linux cirdan 4.8.0-1-drm-intel-nightly #1 SMP PREEMPT Wed Aug 17 20:46:46 MDT 2016 x86_64 GNU/Linux
Comment 1 twelve.eighty 2016-09-15 21:02:47 UTC 
Is there anything else I can try/contribute to this in terms of testing? I am willing to put some time into this, but I'll need some pointers on what test cases to run or patches to try.
Comment 2 Andrey Vihrov 2017-01-14 08:57:25 UTC 
Stable kernel 4.9.3 fixed this for me (Intel HD Graphics 5500). It contains the following commit amongst others: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=d4cb3fd9b548b8bfe2a712ec920b9ebabd3547ab
Comment 3 Ville Syrjala 2017-06-07 13:12:09 UTC 
(In reply to Andrey Vihrov from comment #2)
> Stable kernel 4.9.3 fixed this for me (Intel HD Graphics 5500). It contains
> the following commit amongst others:
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/
> commit?id=d4cb3fd9b548b8bfe2a712ec920b9ebabd3547ab

Thanks. Marking as fixed.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.