Bug 1109968 – Daisy chained DisplayPort v1.2 screens randomly doesn't resume

Bug 1109968 - Daisy chained DisplayPort v1.2 screens randomly doesn't resume


Summary:	Daisy chained DisplayPort v1.2 screens randomly doesn't resume

Status:	NEW

Classification:	openSUSE
Product:	openSUSE Distribution
Classification:	openSUSE
Component:	Kernel
Version:	Leap 15.0
Hardware:	Other Other

Priority:	P5 - None Severity: Normal (vote)
Target Milestone:	---
Assigned To:	openSUSE Kernel Bugs
QA Contact:	E-mail List

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Reported:	2018-09-27 09:00 UTC by Jan Kohoutek
Modified:	2021-12-31 13:08 UTC (History)
CC List:	3 users (show)

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Description Jan Kohoutek 2018-09-27 09:00:47 UTC

When resuming from blank power saving, sometimes some of the displays connected trough Daisy chained DisplayPort v1.2 doesn't resume.

Which one of the display doesn't wake up is random. 

GPU: Intel® HD Graphics 520 (Skylake GT2)
Displays: 2x 1920x1080 Dell U2414H

Comment 1 Jan Kohoutek 2018-09-27 09:02:54 UTC

Happen on X.Org, XW and also in console

Comment 2 Miroslav Beneš 2020-01-14 09:55:47 UTC

Jan, does it still happen with a newer distribution? We should close otherwise.

Comment 3 Jan Kohoutek 2020-01-15 15:30:28 UTC

(In reply to Miroslav Beneš from comment #2)
> Jan, does it still happen with a newer distribution? We should close
> otherwise.

I will re-investigate, as it was so annoying, that I stop using DCh some time ago.

Comment 4 Miroslav Beneš 2020-04-27 12:12:21 UTC

Jan, anything new on your side? Should we just close?

Comment 5 Jan Kohoutek 2020-04-28 13:51:24 UTC

(In reply to Miroslav Beneš from comment #4)
> Jan, anything new on your side? Should we just close?

Cannot test it as we are now grounded at home, and I don't have here screens with daisy chain support.

Comment 6 Miroslav Beneš 2021-12-31 13:08:26 UTC

Nothing has changed much since April 2020, hasn't it?