Frequency scaling on intel core 2 duo e8400

axel · 2008-02-07 17:09:07

I am trying to use frequency scaling for my intel core 2 duo e8400 but when i modprobe acpi-cpufreq I get a message "No such device". What is the correct module for this cpu?

iBertus · 2008-02-07 18:19:24

Perhaps this is because the chip you have is a new 45nm part or because of a BIOS issue. I'm using the acpi-cpufreq driver with my CPU (Core 2 based Xeon) and have no problems, but it's a 65nm part.

axel · 2008-02-10 11:09:06

I don't know if this helps but this is the lsmod output from an ubuntu livecd.

ac                      6148  0
af_packet              24840  0
agpgart                35016  1 intel_agp
ahci                   23300  0
apparmor               40728  0
ata_generic             8452  0
ata_piix               17540  3
battery                11012  0
bluetooth              57060  4 rfcomm,l2cap
btcx_risc               5896  3 cx88_alsa,cx8800,cx88xx
button                  8976  0
cdrom                  37536  1 sr_mod
commoncap               8320  1 apparmor
compat_ioctl32          2304  1 cx8800
container               5504  0
cpufreq_conservative     8072  0
cpufreq_ondemand        9612  0
cpufreq_powersave       2688  0
cpufreq_stats           7232  0
cpufreq_userspace       5280  0
cx8800                 34944  0
cx88_alsa              14600  0
cx88xx                 68132  2 cx88_alsa,cx8800
dock                   10656  0
ehci_hcd               36492  0
evdev                  11136  4
ext3                  133896  2
fan                     5764  0
freq_table              5792  2 cpufreq_stats,cpufreq_ondemand
fuse                   47124  1
hid                    28928  1 usbhid
i2c_algo_bit            7428  1 cx88xx
i2c_core               26112  4 tuner,cx88xx,i2c_algo_bit,tveeprom
ieee1394               96312  1 ohci1394
intel_agp              25620  0
ipv6                  273892  10
ir_common              35460  1 cx88xx
isofs                  36412  1
jbd                    60456  1 ext3
l2cap                  26240  11 rfcomm
libata                125168  4 pata_jmicron,ata_piix,ahci,ata_generic
loop                   19076  2
lp                     12580  0
mbcache                 9732  1 ext3
Module                  Size  Used by
nls_cp437               6784  1
ohci1394               36528  0
parport                37448  3 ppdev,lp,parport_pc
parport_pc             37412  1
pata_jmicron            7552  1
pci_hotplug            32704  1 shpchp
pcspkr                  4224  0
ppdev                  10244  0
processor              32072  1 thermal
psmouse                39952  0
r8169                  32260  0
rfcomm                 42136  2
sbs                    19592  0
scsi_mod              147084  4 sr_mod,sg,sd_mod,libata
sd_mod                 30336  4
serio_raw               8068  0
sg                     36764  0
shpchp                 34580  0
snd                    54660  12 snd_hda_intel,snd_seq_oss,snd_rawmidi,cx88_als$
snd_hda_intel         263712  1
snd_mixer_oss          17664  1 snd_pcm_oss
snd_page_alloc         11400  2 snd_hda_intel,snd_pcm
snd_pcm                80388  3 snd_hda_intel,cx88_alsa,snd_pcm_oss
snd_pcm_oss            44672  0
snd_rawmidi            25728  1 snd_seq_midi
snd_seq                53232  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_$
snd_seq_device          9228  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawm$
snd_seq_dummy           4740  0
snd_seq_midi            9600  0
snd_seq_midi_event      8448  2 snd_seq_oss,snd_seq_midi
snd_seq_oss            33152  0
snd_timer              24324  2 snd_pcm,snd_seq
soundcore               8800  1 snd
squashfs               48132  1
sr_mod                 17828  1
thermal                14344  0
tuner                  63144  0
tveeprom               16784  1 cx88xx
uhci_hcd               26640  0
unionfs                77096  1
usbcore               138632  4 usbhid,uhci_hcd,ehci_hcd
usbhid                 29536  0
v4l1_compat            15364  1 videodev
v4l2_common            18432  4 tuner,cx8800,cx88xx,videodev
video                  18060  0
video_buf              26244  3 cx88_alsa,cx8800,cx88xx
videodev               29312  2 cx8800,cx88xx

robotangel · 2008-02-10 18:19:11

You don't boot Arch with the kernel param noacpi, do you?
I personally don't have any problems with my T7250 at all.

Dehir · 2010-05-09 07:55:23

Im having this similar problem with my e8400. It used to scale down to 2ghz as i have set it up. But when i overclocked my e8400 to 3.6Ghz it stopped working. And my bios detect my cpu as newone when when i changed the cooler before i overclocked.
So im not sure is it about the bios of detecting "new hardware" or the overclock setup i think that ill run it back with defaults once and see what are the results. Happens now with 2.6.33-> kernel atleast.

Dehir · 2010-05-09 08:02:24

Runs without any problems when i set default clocks and let the bios decide. So it wont run at overclocked ?

Arch Linux

#1 2008-02-07 17:09:07

Frequency scaling on intel core 2 duo e8400

#2 2008-02-07 18:19:24

Re: Frequency scaling on intel core 2 duo e8400

#3 2008-02-10 11:09:06

Re: Frequency scaling on intel core 2 duo e8400

#4 2008-02-10 18:19:11

Re: Frequency scaling on intel core 2 duo e8400

#5 2010-05-09 07:55:23

Re: Frequency scaling on intel core 2 duo e8400

#6 2010-05-09 08:02:24

Re: Frequency scaling on intel core 2 duo e8400

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