From: Ilia Mirkin <imirkin@alum.mit.edu>
To: Roland Singer <roland.singer@desertbit.com>
Cc: Emil Velikov <emil.l.velikov@gmail.com>,
Bjorn Helgaas <helgaas@kernel.org>,
Linux PCI <linux-pci@vger.kernel.org>,
"Linux-Kernel@Vger. Kernel. Org" <linux-kernel@vger.kernel.org>,
ML dri-devel <dri-devel@lists.freedesktop.org>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>
Subject: Re: Kernel Freeze with American Megatrends BIOS
Date: Tue, 30 Aug 2016 11:48:14 -0400 [thread overview]
Message-ID: <CAKb7UviJ5syj1PveX1ZeMe5PbVz8V5CyVKWSmQKMUm_dHHQjxA@mail.gmail.com> (raw)
In-Reply-To: <CAKb7UvhyCVoFXYL74eX3rXtt=V7nOnBGaTPVdcJT37v38jD8oQ@mail.gmail.com>
On Tue, Aug 30, 2016 at 11:44 AM, Ilia Mirkin <imirkin@alum.mit.edu> wrote:
> On Tue, Aug 30, 2016 at 11:25 AM, Roland Singer
> <roland.singer@desertbit.com> wrote:
>> I tried these scenarios:
>>
>> 1. Booted the system without the bbswitch module. The nouveau module
>> was loaded and is responsible for the power management of the GPU.
>> The graphical session freezes after some minutes...
>>
>> 2. Booted the system without bbswitch and with nouveau blacklisted.
>> Manually loaded bbswitch to switch off the discrete GPU.
>> Same freeze after a while or by explicitly obtaining the GPU state.
>>
>> Is there a possibility to switch off the discrete card without bbswitch?
>> If this is possible, then I could test this without nouveau and bbswitch
>> at all. If the system hangs, then it is not the video driver nor bbswitch.
>
> You can use acpi_call (a random search points to
> https://github.com/mkottman/acpi_call, but I don't know if that's the
> "official" version) - need to find the right method to call, but
> that's basically all it takes to acpi-suspend a gpu.
>
> Separately, there was a recent fix to ... something, including but not
> limited to nouveau, involving hangs on gpu suspend on newer laptops. I
> don't think it's upstream yet. Look for patches from Lukas Wunner.
Er oops. Looks like I misremembered. Patches are from Peter Wu, and at
least one of them is in v4.8-rc1:
commit 692a17dcc2922a91c6bcf11b3321503a3377b1b1
Author: Peter Wu <peter@lekensteyn.nl>
Date: Fri Jul 15 15:12:18 2016 +0200
drm/nouveau/acpi: fix lockup with PCIe runtime PM
along with a number of other related patches. It's not clear which
kernel you were trying this with... can you give v4.8-rcN a shot?
-ilia
next prev parent reply other threads:[~2016-08-30 15:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <004c7dbe-2014-c691-29d1-7a45f3b73dfa@desertbit.com>
2016-08-29 16:02 ` Kernel Freeze with American Megatrends BIOS Bjorn Helgaas
2016-08-29 18:46 ` Roland Singer
2016-08-29 19:07 ` Bjorn Helgaas
2016-08-29 19:55 ` Roland Singer
2016-08-29 23:54 ` Bjorn Helgaas
2016-08-30 10:08 ` Roland Singer
2016-08-30 13:06 ` Bjorn Helgaas
2016-08-30 14:08 ` Emil Velikov
2016-08-30 15:25 ` Roland Singer
2016-08-30 15:44 ` Ilia Mirkin
2016-08-30 15:48 ` Ilia Mirkin [this message]
2016-08-30 15:48 ` Emil Velikov
2016-08-30 17:37 ` Roland Singer
2016-08-30 17:43 ` Ilia Mirkin
2016-08-30 18:02 ` Roland Singer
2016-08-30 18:13 ` Ilia Mirkin
2016-08-30 19:21 ` Peter Wu
2016-08-31 11:12 ` Roland Singer
2016-08-31 11:11 ` Roland Singer
2016-08-30 18:09 ` Emil Velikov
2016-08-30 18:10 ` Emil Velikov
2016-08-31 10:51 ` Roland Singer
2016-08-30 19:53 ` Peter Wu
2016-08-31 11:27 ` Roland Singer
2016-08-31 11:46 ` Peter Wu
2016-08-31 12:21 ` Roland Singer
2016-08-31 12:34 ` Peter Wu
2016-08-31 13:13 ` Roland Singer
2016-08-31 20:06 ` Roland Singer
2016-08-31 20:16 ` Roland Singer
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