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From: Thorsten Leemhuis <>
To: "" <>
Subject: tboot suspend broken on Lenovo T460p
Date: Fri, 29 Apr 2022 14:03:31 +0200	[thread overview]
Message-ID: <> (raw)

Hi, this is your Linux kernel regression tracker speaking.

About a week ago a regression was reported to that
seems to be handled there already, nevertheless I'd like to add to the
tracking to ensure it's not forgotten.

#regzbot introduced: 453e41085183980087f8a80dada523caf1131c3c
#regzbot from: Derek Dolney <>
#regzbot title: tboot suspend broken on Lenovo T460p
#regzbot link:


> I am using tboot (v1.10.5) to make use of intel-txt and all was
> working fine with the Linux kernel 5.10 series. However later in 5.12
> release candidates, I have  proper booting however suspend is broken.
> I am using a Lenovo T460p. Usually when suspending on this machine
> the power button LED will blink 8 times and then it goes into a sleep
> state. With newer kernels I get power LED and caps lock LED blinking,
> cpu fan runs fast, and can't get out of that state without hard
> powerdown.
> I did a git bisect on and found that commit
> 453e41085183980087f8a80dada523caf1131c3c is the one that breaks
> tboot+suspend to ram. It is part of a series of some cpu hotplug
> commits.
> Just to be clear: if I build a kernel from the commit just before
> this one, I can suspend and resume, but if I build with this commit I
> can not suspend, laptop gets stuck on blinking power LED. Let me also
> mention that, given the above commit, if I do not use tboot, I can
> suspend and resume ok. It is only within the tboot boot context that
> I have suspend&resume problems.

See the ticket for details, there were a few replies already.

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)

P.S.: As the Linux kernel's regression tracker I deal with a lot of
reports and sometimes miss something important when writing mails like
this. If that's the case here, don't hesitate to tell me in a public
reply, it's in everyone's interest to set the public record straight.

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             reply	other threads:[~2022-04-29 12:03 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-29 12:03 Thorsten Leemhuis [this message]
2022-09-26 13:37 ` tboot suspend broken on Lenovo T460p #forregzbot Thorsten Leemhuis
2022-12-08  7:06   ` Thorsten Leemhuis

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