Arch Linux

vollekannehoschi

Member

Registered: 2015-03-08

Posts: 29

Monitor doesn't wake up after DPMS sleep

Hi,

I have bought a new PC with an Intel Core i7-4790K CPU. It includes the HD4600 GPU which should be able to drive my LG 34UM95-P with 3440x1440@60Hz. I connected it via DisplayPort and enabled DP 1.2 in monitor settings. But the display never wakes after the monitor goes into power save mode, instead I get this errors in my log:

Mär 10 16:48:43 maxxgubbl kernel: [drm:intel_dp_start_link_train] *ERROR* failed to enable link training
Mär 10 16:48:43 maxxgubbl kernel: [drm:intel_dp_complete_link_train] *ERROR* failed to start channel equalization

I googled already, but found only people which are never get the display working with DispalyPort and as a solution there was a kernel patch which was already accepted 2013. With HDMI it work with 3440x1440@50Hz so far.

I hope someone can help me.

Alad

Wiki Admin/IRC Op

From: Bagelstan

Registered: 2014-05-04

Posts: 2,420

Website

Re: Monitor doesn't wake up after DPMS sleep

Deja-vu:

https://bbs.archlinux.org/viewtopic.php … 5#p1509565

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Mods are just community members who have the occasionally necessary option to move threads around and edit posts. -- Trilby

vollekannehoschi

Member

Registered: 2015-03-08

Posts: 29

Re: Monitor doesn't wake up after DPMS sleep

"yeah" ^^
I posted a "me too" message at the mentioned kernel bug.