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Date:      Sat, 03 Apr 2021 13:08:55 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 248659] Specific generations of intel chips lock up with P-states active
Message-ID:  <bug-248659-227-3uie7mrPdx@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-248659-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-248659-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D248659

--- Comment #28 from Sergei Masharov <serzh@expir.org> ---
I have updated couple more systems to RC5 and none of them have such strange
dev.cpu.0.freq_levels

As I have mentioned before, on the problematic Lenovo system it looks like=
=20
dev.cpu.0.freq_levels: 2112/-1

if I try to change the dev.cpu.0.freq it looks even more strange:
root@lenovo:/etc # sysctl dev.cpu.0.freq=3D99999
dev.cpu.0.freq: 1005 -> 936
root@lenovo:/etc # sysctl dev.cpu.0.freq=3D2112
dev.cpu.0.freq: 1005 -> 1005
root@lenovo:/etc # sysctl dev.cpu.0.freq=3D2112
dev.cpu.0.freq: 1005 -> 4222
root@lenovo:/etc # sysctl dev.cpu.0.freq=3D2112
dev.cpu.0.freq: 1005 -> 3911
root@lenovo:/etc # sysctl dev.cpu.0.freq=3D2112
dev.cpu.0.freq: 1005 -> 4222


Is it a normal and expected behavior? Because with
hint.hwpstate_intel.0.disabled=3D"1" it looks like on any other system and =
on the
versions before 13.0

If the system is idle it can work up to several hours now, but on any
significant CPU load it freezes just several minutes after.

--=20
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