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Jean Delvare
118a102198
This script puts the vt1211 in automatic PWM mode and fools the chip into believing that there is a temp change to force the PWM outputs to specified values. This is necessary since the standard manual mode of the vt1211 doesn't seem to work. Patch from Juerg Haeflinger. git-svn-id: http://lm-sensors.org/svn/lm-sensors/branches/lm-sensors-3.0.0@5338 7894878c-1315-0410-8ee3-d5d059ff63e0
53 lines
1.8 KiB
Plaintext
53 lines
1.8 KiB
Plaintext
.TH VT1211_PWM 8 "July 2008" "lm-sensors 3"
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.SH NAME
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vt1211_pwm \- manual control of VIA vt1211 PWM outputs
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.SH SYNOPSIS
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.B vt1211_pwm
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.B -d | -i <pwm> | -r <pwm> | -s <pwm>,<val>
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.SH DESCRIPTION
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\fBvt1211_pwm\fP is a shell script that provides manual control of the two PWM
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outputs of the VIA vt1211 Super-I/O device.
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.SH OPTIONS
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.TP
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.B -d
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Display the current settings of the two PWM outputs.
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.TP
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.B -i <pwm>
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Initialize PWM \fB<pwm>\fP for manual control. Valid numbers for \fB<pwm>\fP
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are 1 or 2. This option also writes the original vt1211 register values to
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~/.vt1211_pwm\fB<pwm>\fP which is used for restoring the original settings.
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.TP
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.B -r <pwm>
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Restore PWM \fB<pwm>\fP to the orignal settings. Valid numbers for \fB<pwm>\fP
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are 1 or 2. This options reads the original settings from
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~/.vt1211_pwm\fB<pwm>\fP and writes them to the vt1211.
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.TP
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.B -s <pwm>,<val>
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Set PMW \fB<pwm>\fP output to \fB<val>\fP. Valid numbers for \fB<pwm>\fP are 1
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or 2 and valid numbers for \fB<val>\fP are 0 to 255. The \fB<val>\fP range of
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0-255 maps to an output duty-cycle of 0%-100%, i.e., output duty-cycle =
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\fB<val>\fP * 100 / 255.
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.SH REQUIREMENTS
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You need root privileges to execute the vt1211_pwm script and the vt1211 kernel
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module needs to be loaded and you obviously need to have fans connected to the
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PWM outputs of the vt1211 :-)
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.SH WARNING
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This script puts the PWM controller of the vt1211 into automatic mode and
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toggles the thermal thresholds between extrem values to fool the chip into
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believing that there is a temperature change and thus forcing the PWM outputs
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to change to the specified values. Since there is only a single PWM controller
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that controls both PWM outputs, setting the duty-cycle of one PWM output could
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affect the duty-cycle of the other PWM output. Use at you own risk!
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.SH SEE ALSO
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sensors(1)
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.SH AUTHOR
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.PP
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Juerg Haefliger <juergh at gmail.com>
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