Ubuntu 13.04 - no CPU scaling after resume

[rigobot]

Hi everyone,

before posting a new bug on launchpad I'm asking you for any suggestion. I noticed through turbostat that, after resuming my netbook from suspend, my cpu frequencies are stuck in the lowest value. I than installed the "indicator-cpufreq" to change governor which is for default set on ondemand, and actually changing to conservative I can notice againg the frequencies scaling.
But sadly, once I return to ondemand, the frequencies are fixed angain in the lowest value. If I reboot the machine everything works fine. With ubuntu 12.10 I did not have this behaviour.

Thank you!

My specs:


OS: Ubuntu 13.04 bit

CPU: Intel(R) Core(TM) i5-3320M

MODULES LOADED:
michael_mic 12612 8
arc4 12615 4
bnep 18036 2
rfcomm 42641 12
binfmt_misc 17500 1
nfsd 248016 13
auth_rpcgss 40632 1 nfsd
nfs_acl 12837 1 nfsd
nfs 164047 0
lockd 76670 2 nfs,nfsd
sunrpc 235585 23 nfs,nfsd,auth_rpcgss,lockd,nfs_acl
fscache 57430 1 nfs
snd_hda_codec_hdmi 36996 1
snd_hda_codec_idt 50425 1
joydev 17377 0
coretemp 13355 0
kvm_intel 132891 0
kvm 443165 1 kvm_intel
ghash_clmulni_intel 13259 0
aesni_intel 55399 0
aes_x86_64 17255 1 aesni_intel
xts 12885 1 aesni_intel
lrw 13257 1 aesni_intel
gf128mul 14951 2 lrw,xts
ablk_helper 13597 1 aesni_intel
snd_hda_intel 43715 3
cryptd 20373 3 ghash_clmulni_intel,aesni_intel,ablk_helper
snd_hda_codec 188899 3 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_intel
snd_hwdep 13602 1 snd_hda_codec
snd_pcm 97451 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
snd_page_alloc 18710 2 snd_pcm,snd_hda_intel
snd_seq_midi 13324 0
snd_seq_midi_event 14899 1 snd_seq_midi
snd_rawmidi 30180 1 snd_seq_midi
snd_seq 61554 2 snd_seq_midi_event,snd_seq_midi
snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer 29425 2 snd_pcm,snd_seq
dell_wmi 12681 0
ppdev 17073 0
sparse_keymap 13890 1 dell_wmi
parport_pc 28152 0
lib80211_crypt_tkip 17379 0
btusb 22474 0
wmi 19070 1 dell_wmi
snd 68876 16 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_cod ec_idt,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,s nd_hda_intel,snd_seq_device
i915 600351 3
mac_hid 13205 0
video 19390 1 i915
drm_kms_helper 49394 1 i915
drm 286313 4 i915,drm_kms_helper
dell_laptop 17369 0
bluetooth 228619 22 bnep,btusb,rfcomm
dcdbas 14397 1 dell_laptop
wl 2573614 0
mei 41158 0
i2c_algo_bit 13413 1 i915
psmouse 95870 0
msr 12908 0
lpc_ich 17061 0
serio_raw 13215 1
soundcore 12680 1 snd
lp 17759 0
parport 46345 3 lp,ppdev,parport_pc
lib80211 14352 2 wl,lib80211_crypt_tkip
microcode 22881 0
tg3 153796 0
ptp 18621 1 tg3
pps_core 14080 1 ptp
ahci 25731 3
libahci 31364 1 ahci
sdhci_pci 18590 0
sdhci 32522 1 sdhci_pci

[Doug S]

It seems odd that conservative mode would work yet ondemand mode wouldn't. I wonder if some parameter for ondemand mode got corrupted. Perhaps look around at the settings and such, without using any intermediate tool. Example (not being sure what we are looking for):
doug@s15:~/temp$ ls -l /sys/devices/system/cpu/cpu0/cpufreq
total 0
-r--r--r-- 1 root root 4096 May 12 08:13 affected_cpus
-r--r--r-- 1 root root 4096 May 12 08:13 bios_limit
-r-------- 1 root root 4096 May 12 08:13 cpuinfo_cur_freq
-r--r--r-- 1 root root 4096 May 12 08:13 cpuinfo_max_freq
-r--r--r-- 1 root root 4096 May 12 08:13 cpuinfo_min_freq
-r--r--r-- 1 root root 4096 May 12 08:13 cpuinfo_transition_latency
-r--r--r-- 1 root root 4096 May 12 08:13 related_cpus
-r--r--r-- 1 root root 4096 May 12 08:13 scaling_available_frequencies
-r--r--r-- 1 root root 4096 May 12 08:13 scaling_available_governors
-r--r--r-- 1 root root 4096 May 12 08:13 scaling_cur_freq
-r--r--r-- 1 root root 4096 May 12 08:13 scaling_driver
-rw-r--r-- 1 root root 4096 May 4 14:24 scaling_governor
-rw-r--r-- 1 root root 4096 May 12 08:13 scaling_max_freq
-rw-r--r-- 1 root root 4096 May 12 08:13 scaling_min_freq
-rw-r--r-- 1 root root 4096 May 12 08:13 scaling_setspeed
drwxr-xr-x 2 root root 0 May 12 08:13 stats
doug@s15:~/temp$ sudo cat /sys/devices/system/cpu/cpu0/cpufreq/*
[sudo] password for doug:
0
3401000
3401000
3401000
1600000
10000
0 1 2 3 4 5 6 7
3401000 3400000 3300000 3100000 3000000 2900000 2800000 2600000 2500000 2400000 2200000 2100000 2000000 1900000 1700000 1600000
conservative ondemand userspace powersave performance
1600000
acpi-cpufreq
ondemand
3401000
1600000
<unsupported>
cat: /sys/devices/system/cpu/cpu0/cpufreq/stats: Is a directory
doug@s15:~/temp$ ls -l /sys/devices/system/cpu/cpu0/thermal_throttle
total 0
-r--r--r-- 1 root root 4096 May 12 23:33 core_power_limit_count
-r--r--r-- 1 root root 4096 May 12 23:33 core_throttle_count
-r--r--r-- 1 root root 4096 May 12 23:33 package_power_limit_count
-r--r--r-- 1 root root 4096 May 12 23:33 package_throttle_count
doug@s15:~/temp$ cat /sys/devices/system/cpu/cpu0/thermal_throttle/*
0
0
0
0
doug@s15:~/temp$ ls -l /sys/devices/system/cpu/cpufreq/ondemand
total 0
-rw-r--r-- 1 root root 4096 May 12 23:36 ignore_nice_load
-rw-r--r-- 1 root root 4096 May 12 23:36 io_is_busy
-rw-r--r-- 1 root root 4096 May 12 23:36 powersave_bias
-rw-r--r-- 1 root root 4096 May 12 23:36 sampling_down_factor
-rw-r--r-- 1 root root 4096 May 12 23:36 sampling_rate
-r--r--r-- 1 root root 4096 May 12 23:36 sampling_rate_min
-rw-r--r-- 1 root root 4096 May 12 23:36 up_threshold
doug@s15:~/temp$ cat /sys/devices/system/cpu/cpufreq/ondemand/*
0
1
0
1
10000
10000
95

[rigobot]

Thank you for your response!
I checked every single parameters during a working period and the differences that I found regard:

the frequencies that obviously suite my configuration
the complete absence of the folder "thermal_throttle"


I can't reproduce any more the malfunctioning...when it will happen again I will update the post.

Thank you anyway.