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Date: Fri, 14 Feb 2025 09:42:17 +0100
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Holger =?iso-8859-1?Q?Hoffst=E4tte?= <holger@applied-asynchrony.com>
Cc: stable@vger.kernel.org, patches@lists.linux.dev,
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Subject: Re: [PATCH 6.13 000/443] 6.13.3-rc1 review
Message-ID: <2025021459-guise-graph-edb3@gregkh>
References: <20250213142440.609878115@linuxfoundation.org>
 <e7096ec2-68db-fc3e-9c48-f20d3e80df72@applied-asynchrony.com>
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In-Reply-To: <e7096ec2-68db-fc3e-9c48-f20d3e80df72@applied-asynchrony.com>

On Fri, Feb 14, 2025 at 09:32:06AM +0100, Holger Hoffstätte wrote:
> On 2025-02-13 15:22, Greg Kroah-Hartman wrote:
> > This is the start of the stable review cycle for the 6.13.3 release.
> > There are 443 patches in this series, all will be posted as a response
> > to this one.  If anyone has any issues with these being applied, please
> > let me know.
> 
> Builds & runs fine BUT fails to suspend to RAM 99.99% of the time (basically
> one success but never again). Display powers down but fans stay on.
> 
> Tested on multiple systems, all x64. I first suspected amdgpu because why not :)
> but it also fails on a system without amdgpu, so that's not it.
> 
> Reverting to 6.13.2 immediately fixes everything.
> 
> Common symptom on all machines seems to be
> 
> [  +0.000134] Disabling non-boot CPUs ...
> [  +0.000072] Error taking CPU15 down: -16
> [  +0.000002] Non-boot CPUs are not disabled
> 
> "Error taking down CPUX" is always the highest number of CPU, i.e.
> 15 on my 16-core Zen2 laptop, 3 on my 4-core Sandybridge etc.
> 
> I started to revert suspects but no luck so far:
> - acpi parsing order
> - amdgpu backlight quirks
> - timers/hrtimers
> 
> Suggestions for other suspects are welcome.

Can you run 'git bisect' to try to find the offending change?

thanks,

greg k-h