Messages in this thread | | | Date | Tue, 13 Aug 2019 23:22:04 +0200 | From | Pavel Machek <> | Subject | Re: [Regression] MacBook Pro - suspend does not power off - reaches dangerously hot temps |
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Hi!
You may want to cc maintainers...
M: "Rafael J. Wysocki" <rjw@rjwysocki.net> M: Pavel Machek <pavel@ucw.cz> L: linux-pm@vger.kernel.org
> 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...
Pavel
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