Date: Wed, 9 Feb 2011 13:12:19 +0200 From: Don Rosa <donrosask@gmail.com> To: freebsd-acpi@freebsd.org Subject: AMD (Phenom II x6) Turbo-Core causes random hangs Message-ID: <AANLkTing3eBOO%2B1N7_Vw=a%2Byz%2B-Zi6JmWRenDVUj=JC_@mail.gmail.com>
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When AMD TurboCore is enabled in the BIOS any version of FreeBSD I have tested (8.1R, 8.2-RC3, 3-4months old 9-Current, all AMD64) causes a hard hang (complete hardware freeze) that I am unable to debug. I haven't been able to exactly reproduce the hang, but usually the system freezes after about ~1-2hours of normal usage (eg, compiling some "light" ports) but I have also noticed that the freeze triggers a lot faster when playing something in mplayer. (Mplayer rarely lasts for more than ~40minutes of continuous playback of a simple low-definition movie). The freeze is not ports-userland/X related, as it has happened to hang/freeze in a console pure-install environment by just compiling system/ports with no extra drivers loaded. I have experimented with almost all (except TurboCore of course) BIOS settings with no good results. FreeBSD-side I have also tried various things: - Disabling/Enabling powerd - Disabling acpi_throttle - Disabling apic clock - Disabling cpufreq/hwpstate subsystems - Lowering HZ - Changing sysctl c-state settings - Changing timecounters Of which nothing worked. Finally turning off TurboCore in the BIOS solves the problem completely. I have experienced zero freezes with Turbo=off (machine rock stable), and in sum ~60 freezes with Turbo=on (while I was trying various things to solve the problem). Some extra notes: (all amd64 versions) Windows7 - no hangs ever with Turbo=on whatever the load/usage Linux - no hangs ever with Turbo=on whatever the load/usage OpenBSD 4.8 MP, usage of only 2-3 days, mainly to build stuff, no hangs with Turbo=on.
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