Messages in this thread | | | From | Eric Blau <> | Date | Wed, 25 Sep 2019 08:04:46 -0400 | Subject | Re: [Regression] MacBook Pro - suspend does not power off - reaches dangerously hot temps |
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On Mon, Aug 12, 2019 at 5:44 PM Eric Blau <eblau@eblau.com> wrote: > > Hi all, > > I have a MacBook Pro 12,1 model where I've hit a regression since > upgrading to 5.2.x. When I enter hybrid-sleep mode with "systemctl > hybrid-sleep", the laptop appears to enter suspend (screen turns off > and keyboard backlights go out) but actually is still on with the CPU > fan powered off. > > When I first noticed this, I had put my laptop away in my bag and > noticed it got extremely hot to the point of being dangerously close > to a fire hazard. It was too hot to touch and would not resume > successfully either from suspend or, after powering off, from > hibernate. > > I've had no issues on 5.1 through 5.1.16 but every version of 5.2.x > I've tried (5.2 through 5.2.8) has exhibited this problem. Is there a > known regression in suspend handling in the kernel? I noticed some > traffic about suspend and NVMe devices but I do not have an NVMe > drive. > > If nobody else has reported this issue, I would be glad to do a bisect > to help resolve it.
I guess nobody else has hit this issue. The problem still occurs with 5.3.
I started a bisect and was able to determine that the problem is not present in 5.2 but was introduced in a later 5.2.x stable update and is present in 5.3. I will report my results when the bisect it complete but it takes several hybrid-sleep/resume cycles to be sure the issue does not exist in a given commit. If anyone else is observing this problem or has any ideas, please let me know.
Thanks, Eric Blau
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