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

[Gong, Richard]

Hi Paul,

On 5/1/2022 2:08 AM, Paul Menzel wrote:
> 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@xxxxxxxxx>]
> > > > >
> > > > > […]
> > > > >
> > > > > > > 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.

make a correction, the previous 'dmesg log' description was not accurate.

I referred that to the kernel log captured via 'journalctl' after 
recycling the power. I should use kernel log rather than 'dmesg log' to 
avoid the confusion.

> 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 in my "previous previous" reply, the user have to recycle 
power to reset the system.

When issue occurred, keyboard/mouse didn't work.  'demsg' and ssh didn't 
work either.

> > 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?

I have no idea.


> Kind regards,
>
> Paul

Regards,

Richard