sysfs settings not applied at boot

[Gonçalo Marrafa]

I added some sysfs tweaks to /etc/sysfs.conf and those changes are not applied when the computer boots. If i start the service manually everything works ok.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: sysfsutils 2.1.0+repack-1
ProcVersionSignature: Ubuntu 3.0.0-17.30-generic-pae 3.0.22
Uname: Linux 3.0.0-17-generic-pae i686
ApportVersion: 1.23-0ubuntu4
Architecture: i386
Date: Thu Mar 15 11:35:59 2012
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
SourcePackage: sysfsutils
UpgradeStatus: Upgraded to oneiric on 2011-10-14 (153 days ago)
mtime.conffile..etc.sysfs.conf: 2012-03-09T17:24:51.116117

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Chris Rowson (christopherrowson)]

Same problem here. Set the following in my /etc/sysfs.conf file

devices/system/cpu/cpufreq/ondemand/up_threshold = 40

Works if I issue 'service sysfsutils start' - doesn't work at startup.

Running Ubuntu 12.10 - Gnome Classic.

[bill williams (hilaryfarnsworth)]

12.04 too.

[Alana (alana012)]

For the case with cpufreq on 12.04.3 using the 3.8 kernel LTS enablement stack, I've found that the /sys/devices/system/cpu/cpufreq/ondemand folder doesn't exist on boot. It seems to appear some time later. Maybe 30 - 60 s after boot. I have resorted to putting the below in /etc/rc.local and not use sysfsutils:

until [ -d "/sys/devices/system/cpu/cpufreq/ondemand" ]; do
    sleep 1
done

echo -n "25" > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold
echo -n "10" > /sys/devices/system/cpu/cpufreq/ondemand/sampling_down_factor

[rdratlos (rdratlos)]

I can confirm that sysfs comes too late in Ubuntu 12.04.3. I need access to folder /sys/kernel/config to mount configfs. During boot Ubuntu prints an error notification that the configfs mount in /etc/fstab cannot be mounted due to missing destination directory. I have to manually skip the mount process by pressing "S".

After first login /sys is available, but this is to late.