On Mon, 16 Jan 2012, Kay Sievers wrote:
On Mon, Jan 16, 2012 at 17:35, Cottrell, Allin <cottrell@xxxxxxx> wrote:
On Mon, Jan 16, 2012 at 10:47 AM, Allin Cottrell <cottrell@xxxxxxx> wrote:
After updating to udev-177 + systemd38 I'm hitting a permissions problem
with running the thinkfan program. From syslog:
<hostname> thinkfan: thinkfan 0.7.3 starting...
<hostname> thinkfan: \
/sys/class/hwmon/hwmon2/device/pwm1_enable: \
Operation not permitted
A little more information on this: to control the Thinkpad fan
speed, the thinkpad_acpi module must be loaded with the
option fan_control=1. I have a line that arranges that in
/etc/modprobe.d/modprobe.conf. Apparently this is not
respected by kmod. I tried the experiment of
modprobe -r thinkpad_acpi
modprobe thinkpad_acpi
(using module-init-tools, that is) and now thinkfan works again.
So my next question is, how to ensure that kmod picks up on
the option. I guess I ought to be able to find that myself.
I have the same option, and it seems to work here.
$ echo 'level 2' > /proc/acpi/ibm/fan
does it's thing here, which should indicate, that the option is read
from the conf file.
I think I have it now: unlike module-init-tools, kmod looks in
/usr/etc rather than /etc by default (i.e. unless you
explicitly set sysconfdir).
Allin Cottrell
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