I have the same issue with Linux Mint 7 Gloria (based on Ubuntu 9.04)
and the same 2.6.28 kernel on an Aspire One 150L (Atom N270 CPU). I used
Mint 6 before, with kernel 2.6.24, and the "ondemand" governor used to
scale propertly.
$ uname -a
Linux adrastea 2.6.28-11-generic #42-Ubuntu SMP Fri Apr 17 01:57:59 UTC 2009
i686 GNU/Linux
$ inxi -F -c0
System: Host adrastea Kernel 2.6.28-11-generic i686 (32 bit) Distro Linux
Mint 7 Gloria - Main Edition
CPU: Single core Intel Atom N270 (HT) cache 512 KB flags (sse3) bmips
3192.54
Clock Speeds: (1) 800.00 MHz (2) 1600.00 MHz
Graphics: Card Intel Mobile 945GME Express Integrated Graphics Controller
X.Org 1.6.0 Res [email protected]
Audio: Card Intel 82801G (ICH7 Family) High Definition Audio Controller
driver HDA Intel
Sound: Advanced Linux Sound Architecture Version 1.0.18rc3
Network: Card-1 Realtek RTL8101E/RTL8102E PCI Express Fast Ethernet
controller driver r8169 v: 2.3LK-NAPI at port 3000
Card-2 Atheros AR242x 802.11abg Wireless PCI Express Adapter driver
ath5k v: 0.6.0
Disks: HDD Total Size: 120.0GB (22.1% used) 1: /dev/sda Hitachi HTS54321
120.0GB
Partition: ID:/ size: 22G used: 4.7G (23%) ID:/home size: 79G used: 21G (27%)
ID:swap-1 size: 1.61GB used: 0.00GB (0%)
Info: Processes 135 Uptime 22:50 Memory 239.7/1496.6MB Client Shell inxi
1.0.6
$ cd /sys/devices/system/cpu/cpu0/cpufreq
/sys/devices/system/cpu/cpu0/cpufreq$ sudo grep "." *
affected_cpus:0
cpuinfo_cur_freq:800000
cpuinfo_max_freq:1600000
cpuinfo_min_freq:800000
related_cpus:0 1
scaling_available_frequencies:1600000 1333000 1066000 800000
scaling_available_governors:conservative ondemand userspace powersave
performance
scaling_cur_freq:800000
scaling_driver:acpi-cpufreq
scaling_governor:ondemand
scaling_max_freq:1600000
scaling_min_freq:800000
scaling_setspeed:<unsupported>
/sys/devices/system/cpu/cpu0/cpufreq$ sudo grep "." ondemand/*
ondemand/ignore_nice_load:0
ondemand/powersave_bias:0
ondemand/sampling_rate:80000
ondemand/sampling_rate_max:40000000
ondemand/sampling_rate_min:40000
ondemand/up_threshold:95
--
cpufreq ondemand governor stuck at lowest frequency
https://bugs.launchpad.net/bugs/367739
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