linux-kernel - Re: s2idle stopped working with 6.6-rc on Thinkpad T14 G1 (AMD)

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Date:   Mon, 25 Sep 2023 12:44:03 -0500
From:   Mario Limonciello <mario.limonciello@....com>
To:     Thorsten Leemhuis <linux@...mhuis.info>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux kernel regressions list <regressions@...ts.linux.dev>
Subject: Re: s2idle stopped working with 6.6-rc on Thinkpad T14 G1 (AMD)

On 9/25/2023 08:45, Thorsten Leemhuis wrote:
> On 25.09.23 15:25, Mario Limonciello wrote:
>> On 9/25/2023 05:55, Thorsten Leemhuis wrote:
>>> Hi Mario! Did you by chance hear anything about lock-ups on resume with
>>> mainline affecting AMD systems? I'm asking, as s2idle stopped working
>>> for me with 6.6-rc on my Thinkpad T14 G1 (AMD).
>> You're the first report I've heard of this.
> 
> Thx for taking the time and replying.
> 
>> Yeah not too much useful stuff here unfortunately.  Can you check
>> /var/lib/systemd/pstore to see if you got a traceback for whatever
>> caused the problem?
> 
> Sadly nothing there.
> 
>>> Dmesg for 6.6-rc3 (with a USB-C dock, but problem happens without it,
>>> too):
>>> https://www.leemhuis.info/files/misc/dmesg-6.6_rc3
>>
>> Being G1, can you try "amdgpu.mcbp=0" on kernel command line?
> 
> Just tried it, but didn't help.
> 
> Guess it bisection time then...
> 
> Thx again for your reply. Ciao, Thorsten

FWIW your email prompted me to double check the two other Lenovo systems 
I have on hand at my desk:
* P14s Gen 1
* L14 Gen2a

One of them had a Ubuntu userspace (20.04 IIRC) and the other a Fedora 
38.  I built 6.6-rc3 and couldn't reproduce any issues with s2idle.

So yes; bisect is the next step, thanks.