Date: Sun, 19 Feb 2012 23:09:00 GMT From: Stefan Krueger <stadtkind2@gmx.de> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/165303: CPU freq changing not supported on VIA VE-900 (Nano X2 L4050) Message-ID: <201202192309.q1JN8x2S023927@red.freebsd.org> Resent-Message-ID: <201202192310.q1JNA1Jn067517@freefall.freebsd.org>
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>Number: 165303 >Category: kern >Synopsis: CPU freq changing not supported on VIA VE-900 (Nano X2 L4050) >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sun Feb 19 23:10:00 UTC 2012 >Closed-Date: >Last-Modified: >Originator: Stefan Krueger >Release: FreeBSD 9.0-REL >Organization: >Environment: >Description: There's no dev.cpu.0.freq sysctl even though there's a dev.cpu.0.freq_levels sysctl, thus powerd does not work thus CPU freq changing is not supported on Via Nano X2 CPUs. # sysctl dev.cpu dev.cpu.0.%desc: ACPI CPU dev.cpu.0.%driver: cpu dev.cpu.0.%location: handle=\_PR_.P001 dev.cpu.0.%pnpinfo: _HID=none _UID=0 dev.cpu.0.%parent: acpi0 dev.cpu.0.freq_levels: 1400/0 1200/0 1000/0 800/0 dev.cpu.0.cx_supported: C1/1 dev.cpu.0.cx_lowest: C1 dev.cpu.0.cx_usage: 100.00% last 2430us dev.cpu.1.%desc: ACPI CPU dev.cpu.1.%driver: cpu dev.cpu.1.%location: handle=\_PR_.P002 dev.cpu.1.%pnpinfo: _HID=none _UID=0 dev.cpu.1.%parent: acpi0 dev.cpu.1.cx_supported: C1/1 dev.cpu.1.cx_lowest: C1 dev.cpu.1.cx_usage: 100.00% last 58451us >How-To-Repeat: Start powerd on a Via Nano x2 L4050 and notice no freq. changes are done despite: # dmesg | grep est est0: <Enhanced SpeedStep Frequency Control> on cpu0 est1: <Enhanced SpeedStep Frequency Control> on cpu1 and # sysctl dev.cpu.0.freq_levels dev.cpu.0.freq_levels: 1400/0 1200/0 1000/0 800/0 >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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