From: Emil Velikov <emil.l.velikov@gmail.com>
To: Roland Singer <roland.singer@desertbit.com>
Cc: Bjorn Helgaas <helgaas@kernel.org>,
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, Ilia Mirkin <imirkin@alum.mit.edu>
Subject: Re: Kernel Freeze with American Megatrends BIOS
Date: Tue, 30 Aug 2016 19:09:11 +0100 [thread overview]
Message-ID: <CACvgo52qA9YyaskNObO_f_gg51MqBZHN7mubshJhDUcgO8SZaQ@mail.gmail.com> (raw)
In-Reply-To: <43ce7a5b-8331-fec2-f598-afcb13ba3785@desertbit.com>
On 30 August 2016 at 18:37, Roland Singer <roland.singer@desertbit.com> wrote:
> I am running 4.7.2, but I also just tried the 4.8.0-rc4 mainline kernel.
> The result is the same. There is no difference if bbswitch of acpi_call
> is used. However I noticed following:
>
> 1. The nouveau driver is broken in both kernel version and is responsible
> for the freezes while gathering power state information with bbswitch.
> Sometimes while shutting the system down, everything except the LCD
> screen is switched off. This only happens with nouveau.
> I noticed following error log messages:
>
I second Ilia here. Using bbswitch in conjunction with any driver (be
that nouveau or the proprietary one) is a bad idea.
> kernel: nouveau 0000:01:00.0: fb: 6144 MiB GDDR5
> kernel: nouveau 0000:01:00.0: priv: HUB0: 10ecc0 ffffffff (1e40822c)
> kernel: nouveau 0000:01:00.0: DRM: VRAM: 6144 MiB
> kernel: nouveau 0000:01:00.0: DRM: GART: 1048576 MiB
> kernel: nouveau 0000:01:00.0: DRM: Pointer to TMDS table invalid
> kernel: nouveau 0000:01:00.0: DRM: DCB version 4.1
> kernel: nouveau 0000:01:00.0: DRM: Pointer to flat panel table invalid
>
> 2. -> Boot with nouveau module loaded
> -> switch off the discrete GPU with bbswitch or acpi_call
> -> start X11
> -> obtaining power state with bbswitch freezes the system
> -> or working with the system for some minutes freezes the system
>
(If Ilia's suggestions does not help) Confirm if the freeze is due
to/as the GPU is powered on or off.
> 3. -> Boot with nouveau module blacklisted
> -> switch off the discrete GPU
> -> start X11
> -> system immediately freezes
>
It's perfectly possible that the discrete GPU is set as boot one and X
goes angry since there's no driver/way to bring it up.
> 4. -> Boot with nouveau module blacklisted
> -> switch off the discrete GPU
> -> start Wayland
> -> system runs - Note: I tried this for couple of days with 4.6 and 4.7 mainline
> and the system freezed randomly after some time.
> However I have to test if this is still present with 4.7.2
> and 4.8 mainline. Right now it seams to be fine.
> -> running Xwayland (does not depend on the GPU power state) kills performance!
> the system freezes for several seconds...
> So working with Wayland is also no solution.
>
> My conclusion:
>
> 1. Nouveau has couple of problems with GTX 9** M Nvidia GPUs.
> I would love to help here.
>
> 2. X11 is just broken and is not capable to start the graphical session
> if the nvidia GPU is not handled by any video driver (kernel module).
> Even forcing X11 to ignore the discrete GPU doesn't help.
>
Out of curiosity: how did you force X to ignore the device ?
> Setting the command line arguments to:
>
> acpi_osi=! acpi_osi="Windows 2009"
>
> fixes the issues with X11 but other things break...
> What the hell is going on?! :/
>
You can check if it's the boot_vga assumption with
Check wh
You're a victum of the Windows specific fun (quirks?) in
> Am 30.08.2016 um 17:48 schrieb Emil Velikov:
>> On 30 August 2016 at 16:25, 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.
>>>
>> As Ilia mentioned acpi_call should do it. You can also check with the
>> nouveau/bbwswitch code to see which ones they use in your case and
>> bash it manually. It might be that the 'wrong one' gets used thus
>> things going horribly wrong.
>>
>> Regards,
>> Emil
>>
>
next prev parent reply other threads:[~2016-08-30 18:09 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
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 [this message]
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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