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* Re: [Regression] MacBook Pro - suspend does not power off - reaches dangerously hot temps
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@ 2019-08-13 21:22 ` Pavel Machek
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From: Pavel Machek @ 2019-08-13 21:22 UTC (permalink / raw)
  To: Eric Blau; +Cc: linux-kernel, Rafael J. Wysocki, linux-pm

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You may want to cc maintainers...

M:      "Rafael J. Wysocki" <>
M:      Pavel Machek <>

> 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.

If you are able to push the CPU over 100C, it is a hardware
bug. Hardware should protect itself.

> 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.

You may want to try latest 5.3-rc and -next... And perform basic
debugging such as making sure that normal suspend works and normal
poweroff works.

But yes, if you can bisect it, it will make stuff easy...


(cesky, pictures)

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2019-08-13 21:22 ` [Regression] MacBook Pro - suspend does not power off - reaches dangerously hot temps Pavel Machek

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