From owner-freebsd-hackers@freebsd.org  Tue Sep  4 20:44:16 2018
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Date: Tue, 4 Sep 2018 23:44:14 +0300
From: Lev Serebryakov <lev@FreeBSD.org>
Reply-To: lev@FreeBSD.org
Organization: FreeBSD
Message-ID: <93104614.20180904234414@serebryakov.spb.ru>
To: FreeBSD Current <freebsd-current@freebsd.org>, freebsd-hackers@freebsd.org
Subject: Celeron J3160 with enabled Turbo mode stays at 480MHz (lowest
 setting) forever and can not lower frequency without Tuebo mode
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Hello FreeBSD,

  I'm installing latest 12-ALPHA4 on new MiniPC with Celeron J3160 CPU. It
 is 1.6GHz CPU with Turbo up to 2.somethingGHz.

  If I enable Turbo mode, after booting to FreeBSD it locks at 480MHz
 according to dev.cpu.0.freq, and simple "openssl" test confirms it.

  If I disable Turbo mode, after booting to FreeBSD it locks at 1600MHz even
 if powerd is running.

  It looks like some bug in interaction between cpufreq and Turbo mode of
 this CPU.

-- 
Best regards,
 Lev                          mailto:lev@FreeBSD.org