kern/165303: CPU freq changing not supported on VIA VE-900 (Nano X2
L4050)
Stefan Krueger
stadtkind2 at gmx.de
Sun Feb 19 23:10:01 UTC 2012
>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:
More information about the freebsd-bugs
mailing list