linux-kernel - Re: REGRESSION WITH BISECT: v6.5-rc6 TPM patch breaks S3 on some Intel systems

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Date:   Fri, 18 Aug 2023 07:10:48 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Todd Brandt <todd.e.brandt@...ux.intel.com>,
        mario.limonciello@....com, linux-integrity@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, len.brown@...el.com,
        charles.d.prestopine@...el.com, rafael.j.wysocki@...el.com,
        Linux Regressions <regressions@...ts.linux.dev>
Subject: Re: REGRESSION WITH BISECT: v6.5-rc6 TPM patch breaks S3 on some
 Intel systems

On Thu, Aug 17, 2023 at 02:09:00PM -0700, Todd Brandt wrote:
> While testing S3 on 6.5.0-rc6 we've found that 5 systems are seeing a
> crash and reboot situation when S3 suspend is initiated. To reproduce
> it, this call is all that's required "sudo sleepgraph -m mem -rtcwake
> 15".
> 
> Ive created a Bugzilla to track this issue here:
> https://bugzilla.kernel.org/show_bug.cgi?id=217804
> 
> I've bisected the issue to this patch:
> 
> commit 554b841d470338a3b1d6335b14ee1cd0c8f5d754
> Author: Mario Limonciello <mario.limonciello@....com>
> Date:   Wed Aug 2 07:25:33 2023 -0500
> 
>     tpm: Disable RNG for all AMD fTPMs
>     

Thanks for the regression report. I'm adding it to regzbot:

#regzbot ^introduced: 554b841d470338
#regzbot title: Disabling RNG for AMD fTPMs breaks S3 on some Intel systems

-- 
An old man doll... just what I always wanted! - Clara

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