Bug 82611 - [BDW/HSW Regression ]HDMI hot plug case ERROR.
Summary: [BDW/HSW Regression ]HDMI hot plug case ERROR.
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other Linux (All)
: high normal
Assignee: Todd Previte
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2014-08-14 09:50 UTC by liulei
Modified: 2016-09-28 13:23 UTC (History)
2 users (show)

See Also:
i915 platform:
i915 features:

Attachments
dmesg (123.51 KB, text/plain)
2014-08-14 09:50 UTC, liulei 		no flags Details
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Description liulei 2014-08-14 09:50:39 UTC 
Created attachment 104611 [details]
dmesg

==System Environment==
--------------------------
Regression: Yes. Before this issue , HDMI hot plug cause system hang. 

==kernel==
--------------------------
-nightly: 723dbbfb6ce02b5662c0c4cac9be3bcdfbb11d35 (failed)
    drm-intel-nightly: 2014y-08m-12d-19h-37m-18s integration manifest
-queued: c0ee2e894256703265604a7455d614409c010ce8 (failed)
    drm/i915: Unify ivb_update_cursor() and i9xx_update_cursor()
-fixes: be71eabebaf9f142612d34d42292b454e984dcb5 (failed)
    Revert "drm/i915: Enable semaphores on BDW"

==Bug detailed description==
-----------------------------
bug 81856 block my bisect.
When I unplug or plug in HDMI monitor, ERROR message will be outputted like below: 
[  305.444350] [drm:intel_dp_start_link_train] *ERROR* failed to enable link training
[  305.446126] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
[  305.453020] [drm:drm_dp_dpcd_access] too many retries, giving up
[  305.453021] [drm:intel_dp_start_link_train] *ERROR* failed to enable link training
[  305.454789] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
[  305.461683] [drm:drm_dp_dpcd_access] too many retries, giving up
[  305.461685] [drm:intel_dp_start_link_train] *ERROR* failed to enable link training
[  305.463463] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
[  305.470267] [drm:drm_dp_dpcd_access] too many retries, giving up
[  305.470269] [drm:intel_dp_start_link_train] *ERROR* failed to enable link training
[  305.473171] [drm:intel_dp_set_signal_levels] Using signal levels 00000000
[  305.479570] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
[  305.486403] [drm:drm_dp_dpcd_access] too many retries, giving up
[  305.486405] [drm:intel_dp_start_link_train] *ERROR* failed to update link training
[  305.489126] [drm:intel_dp_set_signal_levels] Using signal levels 01000000
[  305.495960] [drm:drm_dp_dpcd_access] too many retries, giving up
[  305.495962] [drm:intel_dp_complete_link_train] *ERROR* failed to update link training
[  305.497507] [drm:drm_dp_mst_allocate_vcpi] initing vcpi for 619 16
[  305.518263] [drm:intel_mst_enable_dp] 1


==Reproduce steps==
---------------------------- 
1. unplug HDMI monitor
2. plug HDMI monitor
Comment 1 yaoming 2014-08-15 07:14:10 UTC 
This issue also happens on HSW.
Comment 3 liulei 2014-08-19 06:09:26 UTC 
Latest -nightly and -next-queued kernel works well.HDMI Hot plug doesn't cause this ERROR.
Comment 4 Chris Wilson 2014-08-19 06:14:56 UTC 
Presuming it was the hotplug worker fixes until proven otherwise.
Comment 5 Jari Tahvanainen 2016-09-28 13:23:46 UTC 
Not proven otherwise. Closing.

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