From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 104412] RX 460 HDMI 4k 60fps not working, DisplayPort is. Date: Thu, 18 Jan 2018 21:51:17 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1454498434==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 2963F6E016 for ; Thu, 18 Jan 2018 21:51:17 +0000 (UTC) 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 --===============1454498434== Content-Type: multipart/alternative; boundary="15163122771.EBC5C.26300" Content-Transfer-Encoding: 7bit --15163122771.EBC5C.26300 Date: Thu, 18 Jan 2018 21:51:17 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D104412 --- Comment #8 from Peter Weber --- Hello! I'm using a LG 27UD88-W, which featurese 1 x DP, 1 x USB-C (DP) and 2 x HDM= I. In my desktop is a Radeon RX 560 which offers DP "1.4" and HDMI "2.0b" and I also use a ThinkPad X220 which offers DP "1.1". USB-C -> No hardware available DP -> Reserved for ThinkPad, so I can use 3480x2180@30 Hz (probably even= 44 Hz [1]) HDMI -> RX 560 The DP of the RX 560 works fine at 3480x2180@60Hz, but via HDMI it fails wi= th Fedora 27 and kernel "3.14". Only 1920x1***@30Hz is possible any higher resolution results in visual garbage on the screen or "NO SIGNAL". Finally I remembered, that kernel 3.15 will over the new graphics stack "AMDGPU DC". I booted a live ISO with kernel 3.15 and passed the requried option "amdgpu.d= c=3D1" and got 3480x2180@30Hz. GNOME also offers 60Hz as option, but that fails and cannot be used, screen goes blank, until GNOME reverts the settings. I'm af= raid the previous people are right, HDMI2.0b and 4K@60Hz are broken. HINT: Don't used "DEEP COLOR" (LG OPTION for 8/10BIT COLOR?) with HDMI or everything is busted, but that is a minor issue, as for now. [1] https://medium.com/@ValdikSS/how-to-use-high-resolutions-with-older-hardwar= e-58577d91b1f8 --=20 You are receiving this mail because: You are the assignee for the bug.= --15163122771.EBC5C.26300 Date: Thu, 18 Jan 2018 21:51:17 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated

Commen= t # 8 on bug 10441= 2 from Peter Weber 
Hello!

I'm using a LG 27UD88-W, which featurese 1 x DP, 1 x USB-C (DP) and 2 x HDM=
I.
In my desktop is a Radeon RX 560 which offers DP "1.4" and HDMI &=
quot;2.0b" and I
also use a ThinkPad X220 which offers DP "1.1".

USB-C -> No hardware available
DP    -> Reserved for ThinkPad, so I can use 3480x2180@30 Hz (probab=
ly even 44
Hz [1])
HDMI  -> RX 560

The DP of the RX 560 works fine at 3480x2180@60Hz, but via HDMI it fail=
s with
Fedora 27 and kernel "3.14". Only 1920x1***@30Hz is possible =
any higher
resolution results in visual garbage on the screen or "NO SIGNAL"=
. Finally I
remembered, that kernel 3.15 will over the new graphics stack "AMDGPU =
DC". I
booted a live ISO with kernel 3.15 and passed the requried option "amd=
gpu.dc=3D1"
and got 3480x2180@30Hz. GNOME also offers 60Hz as option, but that fail=
s and
cannot be used, screen goes blank, until GNOME reverts the settings. I'm af=
raid
the previous people are right, HDMI2.0b and 4K@60Hz are broken.




HINT: Don't used "DEEP COLOR" (LG OPTION for 8/10BIT COLOR?) with=
 HDMI or
everything is busted, but that is a minor issue, as for now.














[1]
https://medium.com/@ValdikSS/how-to-use-=
high-resolutions-with-older-hardware-58577d91b1f8

You are receiving this mail because:
  • You are the assignee for the bug.
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