linux-kernel - Re: [PATCHv4] drm/amdgpu: disable ASPM on Intel Alder Lake based systems

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Message-ID: <543a9e76-ca90-984b-b155-a0647cdeacff@molgen.mpg.de>
Date:   Sun, 1 May 2022 09:08:15 +0200
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Richard Gong <richard.gong@....com>
Cc:     Dave Airlie <airlied@...ux.ie>, Xinhui Pan <xinhui.pan@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        dri-devel@...ts.freedesktop.org,
        Alex Deucher <alexdeucher@...il.com>,
        amd-gfx@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>,
        Alexander Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Mario Limonciello <mario.limonciello@....com>
Subject: Re: [PATCHv4] drm/amdgpu: disable ASPM on Intel Alder Lake based
 systems

Dear Richard,


Sorry for the late reply.

Am 26.04.22 um 15:53 schrieb Gong, Richard:

> On 4/21/2022 12:35 AM, Paul Menzel wrote:

>> Am 21.04.22 um 03:12 schrieb Gong, Richard:
>>
>>> On 4/20/2022 3:29 PM, Paul Menzel wrote:
>>
>>>> Am 19.04.22 um 23:46 schrieb Gong, Richard:
>>>>
>>>>> On 4/14/2022 2:52 AM, Paul Menzel wrote:
>>>>>> [Cc: -kernel test robot <lkp@...el.com>]
>>>>
>>>> […]
>>>>
>>>>>> Am 13.04.22 um 15:00 schrieb Alex Deucher:
>>>>>>> On Wed, Apr 13, 2022 at 3:43 AM Paul Menzel wrote:
>>>>>>
>>>>>>>> Thank you for sending out v4.
>>>>>>>>
>>>>>>>> Am 12.04.22 um 23:50 schrieb Richard Gong:

[…]

>>>>>>>> I am still not clear, what “hang during suspend/resume” means. I 
>>>>>>>> guess
>>>>>>>> suspending works fine? During resume (S3 or S0ix?), where does 
>>>>>>>> it hang?
>>>>>>>> The system is functional, but there are only display problems?
>>>>> System freeze after suspend/resume.
>>>>
>>>> But you see certain messages still? At what point does it freeze 
>>>> exactly? In the bug report you posted Linux messages.
>>>
>>> No, the system freeze then users have to recycle power to recover.
>>
>> Then I misread the issue? Did you capture the messages over serial log 
>> then?
> 
> I think so. We captured dmesg log.

Then the (whole) system did *not* freeze, if you could still log in 
(maybe over network) and execute `dmesg`. Please also paste the 
amdgpu(?) error logs in the commit message.

> As mentioned early we need support from Intel on how to get ASPM working 
> for VI generation on Intel Alder Lake, but we don't know where things 
> currently stand.

Who is working on this, and knows?


Kind regards,

Paul