From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 109135] R9 390 hangs at boot with DPM/DC enabled for kernels 4.19.x and above, says KMS not supported Date: Mon, 14 Jan 2019 19:19:25 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1115424910==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 70F5C6E3B1 for ; Mon, 14 Jan 2019 19:19:25 +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 --===============1115424910== Content-Type: multipart/alternative; boundary="15474935650.d8cbc94.3668" Content-Transfer-Encoding: 7bit --15474935650.d8cbc94.3668 Date: Mon, 14 Jan 2019 19:19:25 +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=3D109135 --- Comment #18 from Alex Deucher --- (In reply to rmuncrief from comment #17) > Yes, As I said in the beginning if you don't set amdgpu.dpm=3D1 the system > boots but resume doesn't work. I presume it's because power management is= n't > working. All kernels before 4.19.x work great, and have no problem with > resume so long as dpm is enabled. dynamic power management is always enabled by default. the only way to dis= able it is to set dpm=3D0. dpm=3D1 either does nothing or changes the implement= ation used in the driver depending on the asic. You shouldn't set dpm=3D unless = you are debugging something. For your asic, kernels 4.18 and older the default = was the original dpm implementation; setting dpm=3D1 used the newer powerplay c= ode.=20 For kernel 4.19 and newer, the default implementation switched to the newer powerplay code and setting dpm=3D1 switched back to the older implementatio= n. So removing dpm=3D1 is correct for 4.19 and newer. Can you elaborate on the r= esume issue? --=20 You are receiving this mail because: You are the assignee for the bug.= --15474935650.d8cbc94.3668 Date: Mon, 14 Jan 2019 19:19:25 +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

Comme= nt # 18 on bug 10913= 5 from Alex Deucher 
(In reply to rmuncrief from comment #17)
> Yes, As I said in the beginning if you don't set=
 amdgpu.dpm=3D1 the system
> boots but resume doesn't work. I presume it's because power management=
 isn't
> working. All kernels before 4.19.x work great, and have no problem with
> resume so long as dpm is enabled.

dynamic power management is always enabled by default.  the only way to dis=
able
it is to set dpm=3D0.  dpm=3D1 either does nothing or changes the implement=
ation
used in the driver depending on the asic.  You shouldn't set dpm=3D unless =
you
are debugging something. For your asic, kernels 4.18 and older the default =
was
the original dpm implementation; setting dpm=3D1 used the newer powerplay c=
ode.=20
For kernel 4.19 and newer, the default implementation switched to the newer
powerplay code and setting dpm=3D1 switched back to the older implementatio=
n.  So
removing dpm=3D1 is correct for 4.19 and newer.  Can you elaborate on the r=
esume
issue?

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