From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 106597] [vga_switcheroo] commit 07f4f97d7b4bf325d9f558c5b58230387e4e57e0 breaks dpm on Alienware 15R3 Date: Mon, 21 May 2018 21:47:32 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0702762822==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [IPv6:2610:10:20:722:a800:ff:fe98:4b55]) by gabe.freedesktop.org (Postfix) with ESMTP id 8D2CB6E019 for ; Mon, 21 May 2018 21:47:32 +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 --===============0702762822== Content-Type: multipart/alternative; boundary="15269392520.DE13C0.19014" Content-Transfer-Encoding: 7bit --15269392520.DE13C0.19014 Date: Mon, 21 May 2018 21:47:32 +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=3D106597 --- Comment #5 from Lukas Wunner --- Ok I found this dmesg ouput of a 4.17 kernel... https://bugs.freedesktop.org/attachment.cgi?id=3D139668 However the HDA device 0000:01:00.1 is not enumerated! It *is* enumerated in the 4.16 dmesg output you've attached. What gives? We know there are Nvidia GPUs which hide the HDA controller if no external display is attached: https://bugs.freedesktop.org/show_bug.cgi?id=3D75985 Maybe something like that is going on here despite this being an AMD GPU? Also, there are Dell machines which can be switched to one of two modes in = the BIOS: In one mode, audio is streamed to external displays via the Intel HDA= , in the other mode, it's streamed via the AMD HDA. In the former mode, the AMD = HDA serves no purpose and should thus be hidden as per this patch: https://lkml.org/lkml/2018/4/20/244 It's possible that something similar is needed here. --=20 You are receiving this mail because: You are the assignee for the bug.= --15269392520.DE13C0.19014 Date: Mon, 21 May 2018 21:47:32 +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 # 5 on bug 10659= 7 from Lukas Wunner 
Ok I found this dmesg ouput of a 4.17 kernel...
https:/=
/bugs.freedesktop.org/attachment.cgi?id=3D139668

However the HDA device 0000:01:00.1 is not enumerated! It *is* enumerated in
the 4.16 dmesg output you've attached. What gives?

We know there are Nvidia GPUs which hide the HDA controller if no external
display is attached:
https://bugs.freedesktop.org/show_bug.c=
gi?id=3D75985

Maybe something like that is going on here despite this being an AMD GPU?

Also, there are Dell machines which can be switched to one of two modes in =
the
BIOS: In one mode, audio is streamed to external displays via the Intel HDA=
, in
the other mode, it's streamed via the AMD HDA. In the former mode, the AMD =
HDA
serves no purpose and should thus be hidden as per this patch:
https://lkml.org/lkml/2018/=
4/20/244

It's possible that something similar is needed here.

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