Bug 99434 - Intel 6700 HD 530 hdmi never wakes up after suspend
Summary: Intel 6700 HD 530 hdmi never wakes up after suspend
Status: CLOSED FIXED
Alias: None
Product: DRI
Classification: Unclassified
Component: DRM/Intel (show other bugs)
Version: unspecified
Hardware: Other All
: medium normal
Assignee: Intel GFX Bugs mailing list
QA Contact: Intel GFX Bugs mailing list
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2017-01-16 23:03 UTC by hnr2k6
Modified: 2017-07-24 22:39 UTC (History)
1 user (show)

See Also:
i915 platform: SKL
i915 features: display/HDMI, power/suspend-resume

Attachments
after boot (316.29 KB, text/plain)
2017-01-23 20:06 UTC, hnr2k6 		no flags Details
After boot, remove and insert hdmi (402.53 KB, text/plain)
2017-01-23 20:06 UTC, hnr2k6 		no flags Details
suspend and wake up (534.99 KB, text/plain)
2017-01-23 20:07 UTC, hnr2k6 		no flags Details
remove hdmi and rpelug after suspend and wakeup (551.57 KB, text/plain)
2017-01-23 20:07 UTC, hnr2k6 		no flags Details
Working logs with drm tip kernel 4.10 (515.92 KB, text/plain)
2017-02-09 18:56 UTC, hnr2k6 		no flags Details
View All

Description hnr2k6 2017-01-16 23:03:17 UTC 
Seems like a common problem independent of the actual OS across Intel graphics devices: http://askubuntu.com/questions/794440/no-hdmi-video-after-suspend-on-intel-nuc6i7kyk

https://techreport.com/forums/viewtopic.php?t=118272


I have tried many kernels from 4.4 to 4.9. All exhibit the same issue. Currently on Ubuntu 16.10 with the latest intel graphics drivers. 

Display port works fine. I have swapped cables and tried different monitors. Same issue. Rebooting gets nback the hdmi display. On resume, the port looks dead.

I noticed a similar issue: https://bugs.freedesktop.org/show_bug.cgi?id=94014

Please let me know how I can help to debug the issue. Thanks
Comment 1 yann 2017-01-20 17:03:27 UTC 
hnr2k6@gmail.com, can you reproduce issue with "drm.debug=0xe log_buf_len=4M" in
your boot command line and then attached your dmesg.
Thanks
Comment 2 hnr2k6 2017-01-23 20:06:24 UTC 
Created attachment 129115 [details]
after boot
Comment 3 hnr2k6 2017-01-23 20:06:42 UTC 
Created attachment 129116 [details]
After boot, remove and insert hdmi
Comment 4 hnr2k6 2017-01-23 20:07:01 UTC 
Created attachment 129117 [details]
suspend and wake up
Comment 5 hnr2k6 2017-01-23 20:07:22 UTC 
Created attachment 129118 [details]
remove hdmi and rpelug after suspend and wakeup
Comment 6 hnr2k6 2017-01-23 20:07:53 UTC 
Attached logs. The logs are cumulative containing data from previous events.

Thanks for looking.
Comment 7 hnr2k6 2017-01-26 16:43:18 UTC 
Please let me know if you need additional info.
Comment 8 hnr2k6 2017-02-07 19:12:18 UTC 
Is there any prospect of a fix from the diagnosis? Thanks.
Comment 9 Jani Nikula 2017-02-08 10:35:46 UTC 
From kernel perspective you don't have HDMI connected, just DP. Does the chassis have a HDMI connector, or are you using a DP->HDMI adapter? If the former, you probably have LSPCON, an internal DP->HDMI2.0 adapter.

Please try current drm-tip branch from https://cgit.freedesktop.org/drm-tip
Comment 10 hnr2k6 2017-02-09 18:56:16 UTC 
I tried 4.10.0.-994 from ubuntu drm-tip and that worked. I have attached the logs just in case it might be useful.

Thanks for the help!
Comment 11 hnr2k6 2017-02-09 18:56:44 UTC 
Created attachment 129447 [details]
Working logs with drm tip kernel 4.10

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