From: "Rafael J. Wysocki" <rafael@kernel.org>
To: Karol Herbst <kherbst@redhat.com>,
Mika Westerberg <mika.westerberg@intel.com>
Cc: Linux PM <linux-pm@vger.kernel.org>,
Linux PCI <linux-pci@vger.kernel.org>,
Mario Limonciello <Mario.Limonciello@dell.com>,
"Rafael J . Wysocki" <rjw@rjwysocki.net>,
LKML <linux-kernel@vger.kernel.org>,
dri-devel <dri-devel@lists.freedesktop.org>,
Bjorn Helgaas <helgaas@kernel.org>,
nouveau <nouveau@lists.freedesktop.org>
Subject: Re: [PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges
Date: Wed, 20 Nov 2019 13:11:36 +0100 [thread overview]
Message-ID: <CAJZ5v0hYLrmFup61kzQL_rUuRy9yb+3L-BdRUGfSKqkGpm-utw@mail.gmail.com> (raw)
Message-ID: <20191120121136.M-mjavixIRNQI4SnxqMTIGR_MyLinkaPeb7co1r_hQ4@z> (raw)
In-Reply-To: <CAJZ5v0ithxMPK2YxfTUx_Ygpze2FMDJ6LwKwJb2vx89dfgHX_A@mail.gmail.com>
On Wed, Nov 20, 2019 at 1:06 PM Rafael J. Wysocki <rafael@kernel.org> wrote:
>
> On Wed, Nov 20, 2019 at 12:51 PM Karol Herbst <kherbst@redhat.com> wrote:
> >
> > On Wed, Nov 20, 2019 at 12:48 PM Rafael J. Wysocki <rafael@kernel.org> wrote:
> > >
> > > On Wed, Nov 20, 2019 at 12:22 PM Mika Westerberg
> > > <mika.westerberg@intel.com> wrote:
> > > >
> > > > On Wed, Nov 20, 2019 at 11:52:22AM +0100, Rafael J. Wysocki wrote:
> > > > > On Wed, Nov 20, 2019 at 11:18 AM Mika Westerberg
> > > > > <mika.westerberg@intel.com> wrote:
> > > > > >
>
> [cut]
>
> > > > >
> > > > > Oh, so does it look like we are trying to work around AML that tried
> > > > > to work around some problematic behavior in Linux at one point?
> > > >
> > > > Yes, it looks like so if I read the ASL right.
> > >
> > > OK, so that would call for a DMI-based quirk as the real cause for the
> > > issue seems to be the AML in question, which means a firmware problem.
> > >
> >
> > And I disagree as this is a linux specific workaround and windows goes
> > that path and succeeds. This firmware based workaround was added,
> > because it broke on Linux.
>
> Apparently so at the time it was added, but would it still break after
> the kernel changes made since then?
>
> Moreover, has it not become harmful now? IOW, wouldn't it work after
> removing the "Linux workaround" from the AML?
>
> The only way to verify that I can see would be to run the system with
> custom ACPI tables without the "Linux workaround" in the AML in
> question.
Or running it with acpi_rev_override as suggested by Mika, which
effectively would be the same thing.
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next prev parent reply other threads:[~2019-11-20 12:11 UTC|newest]
Thread overview: 117+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-17 12:19 [PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges Karol Herbst
2019-11-14 19:17 ` Karol Herbst
2019-11-14 19:17 ` Karol Herbst
[not found] ` <20191017121901.13699-1-kherbst-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2019-11-19 20:06 ` Dave Airlie
2019-11-19 20:06 ` Dave Airlie
2019-11-19 21:49 ` Bjorn Helgaas
2019-11-19 21:49 ` Bjorn Helgaas
[not found] ` <20191119214955.GA223696-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2019-11-19 22:26 ` Karol Herbst
2019-11-19 22:26 ` Karol Herbst
2019-11-19 22:57 ` Bjorn Helgaas
2019-11-19 22:57 ` Bjorn Helgaas
2019-11-20 10:18 ` Mika Westerberg
2019-11-20 10:18 ` Mika Westerberg
[not found] ` <20191120101816.GX11621-3PARRvDOhMZrdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2019-11-20 10:52 ` Rafael J. Wysocki
2019-11-20 10:52 ` Rafael J. Wysocki
2019-11-20 11:22 ` Mika Westerberg
2019-11-20 11:22 ` Mika Westerberg
2019-11-20 11:48 ` Rafael J. Wysocki
2019-11-20 11:51 ` Karol Herbst
2019-11-20 11:51 ` Karol Herbst
[not found] ` <CACO55tsjj+xkDjubz1J=fsPecW4H_J8AaBTeaMm+NYjp8Kiq8g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-11-20 12:06 ` Rafael J. Wysocki
2019-11-20 12:06 ` Rafael J. Wysocki
[not found] ` <CAJZ5v0ithxMPK2YxfTUx_Ygpze2FMDJ6LwKwJb2vx89dfgHX_A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-11-20 12:09 ` Karol Herbst
2019-11-20 12:09 ` Karol Herbst
2019-11-20 12:14 ` Rafael J. Wysocki
2019-11-20 12:14 ` Rafael J. Wysocki
2019-11-20 12:19 ` Karol Herbst
2019-11-20 12:19 ` Karol Herbst
2019-11-20 12:11 ` Rafael J. Wysocki [this message]
2019-11-20 12:11 ` Rafael J. Wysocki
2019-11-20 11:51 ` Mika Westerberg
2019-11-20 11:51 ` Mika Westerberg
[not found] ` <20191120115127.GD11621-3PARRvDOhMZrdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2019-11-20 11:54 ` Karol Herbst
2019-11-20 11:54 ` Karol Herbst
[not found] ` <CACO55tsfNOdtu5SZ-4HzO4Ji6gQtafvZ7Rm19nkPcJAgwUBFMw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-11-20 11:58 ` Karol Herbst
2019-11-20 11:58 ` Karol Herbst
2019-11-20 12:09 ` Mika Westerberg
2019-11-20 12:09 ` Mika Westerberg
[not found] ` <20191120120913.GE11621-3PARRvDOhMZrdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2019-11-20 12:11 ` Karol Herbst
2019-11-20 12:11 ` Karol Herbst
2019-11-20 15:15 ` Mika Westerberg
2019-11-20 15:15 ` Mika Westerberg
2019-11-20 15:37 ` Karol Herbst
2019-11-20 15:53 ` Mika Westerberg
2019-11-20 15:53 ` Mika Westerberg
2019-11-20 16:23 ` Mika Westerberg
2019-11-20 16:23 ` Mika Westerberg
[not found] ` <20191120162306.GM11621-3PARRvDOhMZrdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2019-11-20 21:36 ` Karol Herbst
2019-11-20 21:36 ` Karol Herbst
2019-11-21 10:14 ` Mika Westerberg
2019-11-21 10:14 ` Mika Westerberg
2019-11-21 11:03 ` Rafael J. Wysocki
[not found] ` <CAJZ5v0hAgz4Fu=83AJE2PYUsi+Jk=Lrr4MNp5ySA9yY=3wr5rg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-11-21 11:08 ` Rafael J. Wysocki
2019-11-21 11:08 ` Rafael J. Wysocki
2019-11-21 11:15 ` Rafael J. Wysocki
2019-11-21 11:15 ` Rafael J. Wysocki
2019-11-21 11:17 ` Mika Westerberg
2019-11-21 11:17 ` Mika Westerberg
2019-11-21 11:31 ` Rafael J. Wysocki
2019-11-21 11:31 ` Rafael J. Wysocki
2019-11-20 21:37 ` Rafael J. Wysocki
2019-11-20 21:37 ` Rafael J. Wysocki
2019-11-20 21:40 ` Karol Herbst
2019-11-20 21:40 ` Karol Herbst
2019-11-20 22:29 ` Rafael J. Wysocki
2019-11-20 22:29 ` Rafael J. Wysocki
2019-11-21 11:28 ` Mika Westerberg
[not found] ` <20191121112821.GU11621-3PARRvDOhMZrdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2019-11-21 11:34 ` Rafael J. Wysocki
2019-11-21 11:34 ` Rafael J. Wysocki
2019-11-21 11:46 ` Mika Westerberg
2019-11-21 11:46 ` Mika Westerberg
2019-11-21 12:52 ` Mika Westerberg
2019-11-21 12:56 ` Karol Herbst
2019-11-21 12:56 ` Karol Herbst
[not found] ` <20191121125236.GX11621-3PARRvDOhMZrdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2019-11-21 15:43 ` Rafael J. Wysocki
2019-11-21 15:43 ` Rafael J. Wysocki
2019-11-21 19:49 ` Mika Westerberg
2019-11-21 19:49 ` Mika Westerberg
[not found] ` <20191121194942.GY11621-3PARRvDOhMZrdx17CPfAsdBPR1lH4CV8@public.gmane.org>
2019-11-21 22:39 ` Rafael J. Wysocki
2019-11-21 22:39 ` Rafael J. Wysocki
2019-11-21 22:50 ` Karol Herbst
2019-11-22 0:13 ` Karol Herbst
2019-11-22 0:13 ` Karol Herbst
2019-11-22 9:07 ` Rafael J. Wysocki
2019-11-22 9:07 ` Rafael J. Wysocki
[not found] ` <CAJZ5v0jNq77xPXxeYeq_JJBCfekVPVPOye1mZwpQi=+=MKSS7w-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-11-22 11:30 ` Karol Herbst
2019-11-22 11:30 ` Karol Herbst
2019-11-22 10:36 ` Mika Westerberg
2019-11-22 11:30 ` Rafael J. Wysocki
2019-11-22 11:30 ` Rafael J. Wysocki
[not found] ` <CAJZ5v0gifnGZcKr6mgc6C2EfqX13OyJnOac0uDxYNKN=A0cgMg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-11-22 11:34 ` Karol Herbst
2019-11-22 11:34 ` Karol Herbst
2019-11-22 11:54 ` Rafael J. Wysocki
2019-11-22 11:54 ` Rafael J. Wysocki
2019-11-22 11:52 ` Mika Westerberg
2019-11-22 12:15 ` Rafael J. Wysocki
2019-11-21 12:52 ` Karol Herbst
2019-11-21 12:52 ` Karol Herbst
2019-11-21 15:47 ` Rafael J. Wysocki
2019-11-21 15:47 ` Rafael J. Wysocki
2019-11-21 16:06 ` Karol Herbst
2019-11-21 16:06 ` Karol Herbst
2019-11-21 16:39 ` Rafael J. Wysocki
2019-11-21 16:39 ` Rafael J. Wysocki
2019-11-26 23:10 ` Lyude Paul
2019-11-27 11:48 ` Mika Westerberg
2019-11-27 11:48 ` Mika Westerberg
2019-11-27 11:51 ` Karol Herbst
2019-11-27 11:51 ` Karol Herbst
2019-11-27 19:51 ` Lyude Paul
2019-11-27 19:51 ` Lyude Paul
2019-12-09 11:17 ` Karol Herbst
2019-12-09 11:38 ` Rafael J. Wysocki
2019-12-09 12:24 ` Karol Herbst
2019-12-10 19:58 ` Dave Airlie
2019-12-10 20:49 ` Karol Herbst
2020-01-13 15:31 ` Karol Herbst
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