On netbook Asus eeePC 1015PE, CPU temperature is 20°C higher than on Windows 7

[Thomas Basset]

I've just bought an Asus eeePC 1015PE. It comes with an Atom N450 which is usually very cool and therefore quiet. I've just installed Ubuntu Maverick 10.10 Netbook Edition and the cooling fan is kind of going crazy. The temperature of the CPU is sometimes under 40°C on Windows 7. On Ubuntu, it never goes under 60°C.

It makes this little netbook a little bit loud. I'm really willing to help. Do you need any information?

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.33
Regression: No
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.33-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC259 Analog [ALC259 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC259 Analog [ALC259 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: goon 1510 F.... pulseaudio
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf7cf8000 irq 45'
   Mixer name : 'Realtek ALC259'
   Components : 'HDA:10ec0269,1043841c,00100100'
   Controls : 11
   Simple ctrls : 7
Date: Tue Oct 12 10:49:15 2010
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=64e5aec0-dd62-4ccf-8c7d-4ec07fb38252
InstallationMedia: Ubuntu-Netbook 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: ASUSTeK Computer INC. 1015PE
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-22-generic root=UUID=49365cdf-6de4-449d-a035-c22b4c1e6ea2 ro quiet splash
ProcEnviron:
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 07/12/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 0603
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 1015PE
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: x.xx
dmi.chassis.asset.tag: 0x00000000
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK Computer INC.
dmi.chassis.version: x.x
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0603:bd07/12/2010:svnASUSTeKComputerINC.:pn1015PE:pvrx.x:rvnASUSTeKComputerINC.:rn1015PE:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x:
dmi.product.name: 1015PE
dmi.product.version: x.x
dmi.sys.vendor: ASUSTeK Computer INC.

[Jeremy Foshee (jeremyfoshee)]

Hi Thomas,

If you could also please test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

    [This is an automated message. Apologies if it has reached you inappropriately; please just reply to this message indicating so.]

[Thomas Basset (thomasbasset)]

Sorry I did not looked at the good temperature (a kernel module was not loaded). The temperature is the same as on Windows 7.

[Arkham (arkham)]

Hello,

sensors command show my 1015PE at 78°C (173°F), what is the name of your kernel module unloaded ? My coolfan never stop is job. Thx.

[Thomas Basset (thomasbasset)]

I just made sensors-detect and added the module that were suggested. After a reboot I'm able to see two temperatures : the internal one and the external one. When the Asus is not in intensive use, they reach 40°C and 60°C which is the same as on Windows 7.