Bug 165303 - [est] CPU freq changing not supported on VIA VE-900 (Nano X2 L4050)
Summary: [est] CPU freq changing not supported on VIA VE-900 (Nano X2 L4050)
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: kern (show other bugs)
Version: Unspecified
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-bugs (Nobody)
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2012-02-19 23:10 UTC by stadtkind2
Modified: 2017-12-31 22:32 UTC (History)
0 users

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Description stadtkind2 2012-02-19 23:10:00 UTC 
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
Comment 1 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 08:00:42 UTC 
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

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