From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 27314] displayport link training fails on certain panels (channel equalization fails) Date: Sun, 27 Dec 2015 11:02:47 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0580734592==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 6506E89B96 for ; Sun, 27 Dec 2015 03:02:47 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0580734592== Content-Type: multipart/alternative; boundary="1451214167.eD2757ff1.12432"; charset="UTF-8" --1451214167.eD2757ff1.12432 Date: Sun, 27 Dec 2015 11:02:47 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=27314 Benjamin Bellec changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |b.bellec@gmail.com --- Comment #72 from Benjamin Bellec --- I bought a new screen and it looks like I have the same issue. Hardware is: GPU: Radeon HD5850 (1GB) Screen: Dell U2414H Connection: DisplayPort (GPU) / MiniDisplayPort (Screen) Software is: Fedora 23 (64-bit) Kernel 4.2.8 At Fedora loading my screens got no more signal and enter in sleep mode. If I unplug and replug the DisplayPort cable the screen connection is recovered. The log shows these 2 messages: [drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed: 5 tries [drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed -- You are receiving this mail because: You are the assignee for the bug. --1451214167.eD2757ff1.12432 Date: Sun, 27 Dec 2015 11:02:47 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" changed bug 27314
What Removed Added
CC   b.bellec@gmail.com

Comment # 72 on bug 27314 from 
I bought a new screen and it looks like I have the same issue.

Hardware is:
GPU: Radeon HD5850 (1GB)
Screen: Dell U2414H
Connection: DisplayPort (GPU) / MiniDisplayPort (Screen)

Software is:
Fedora 23 (64-bit)
Kernel 4.2.8

At Fedora loading my screens got no more signal and enter in sleep mode. If I
unplug and replug the DisplayPort cable the screen connection is recovered.

The log shows these 2 messages:
[drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed: 5 tries
[drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed

You are receiving this mail because:
  • You are the assignee for the bug.
--1451214167.eD2757ff1.12432-- --===============0580734592== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVs IG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHA6Ly9saXN0 cy5mcmVlZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWwK --===============0580734592==--