Comment 3 for bug 605465

Will do! Thanks for your assistance with this.

I've just installed powertop and will run the commands you mention the next
time I have this issue. I'd really like to get this sorted out as I'm a
huge fan of Ubuntu and it seems like this is an ongoing problem for me.

-mark

On Fri, Jul 16, 2010 at 10:37 AM, David Bensimon
<email address hidden>wrote:

> Hello Mark,
>
> When the issue is present, could you please preform the following to
> provide more information to kernel developers. You will need to install
> the "powertop" package before doing this.
>
> 1) Open a terminal
> 2) Run the following command
> $ while true; do false; done
> 3) Press Ctrl-Shift-T to open a new terminal tab
> 4) Run this command:
> $ sudo powertop -d -t30 > ~/powertop_output.txt
>
> Once powertop stops, please attach the powertop_output.txt file from
> your home directory into this bug.
>
> --
> Dell XPS M1330 CPU scales down to 800 MHz
> https://bugs.launchpad.net/bugs/605465
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux” package in Ubuntu: New
>
> Bug description:
> My Dell XPS M1330 regularly scales the CPU on demand for a few hours, then
> begins to scale the 2.4 GHz CPU down to 800 MHz as the day goes on.
> Selecting the performance profile will not cause the CPU to return to 2.4
> GHz.
>
> Selecting the older version 173 of the NVIDIA driver seemed to reduce the
> frequency of this issue, though it still occurred so I have returned to the
> latest driver release. I'm not sure it this is because the GPU was
> generating heat that was adversely affecting the performance of the CPU but
> I am monitoring the temperate of both CPU and GPU now and will watch to see
> what they are when this problem arises. Does Ubuntu ever force CPU scaling
> as the computer gets warmer?
>
> I've included an attachment describing my CPU information to this bug.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 10.04
> Package: linux-image-2.6.32-23-generic 2.6.32-23.37
> Regression: No
> Reproducible: No
> ProcVersionSignature: Ubuntu 2.6.32-23.37-generic 2.6.32.15+drm33.5
> Uname: Linux 2.6.32-23-generic x86_64
> NonfreeKernelModules: nvidia
> AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
> Architecture: amd64
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: mark 1799 F.... pulseaudio
> /dev/snd/pcmC0D0p: mark 1799 F...m pulseaudio
> CRDA: Error: [Errno 2] No such file or directory
> Card0.Amixer.info:
> Card hw:0 'Intel'/'HDA Intel at 0xf6ffc000 irq 21'
> Mixer name : 'SigmaTel STAC9228'
> Components : 'HDA:83847616,10280209,00100201'
> Controls : 28
> Simple ctrls : 18
> Date: Wed Jul 14 09:08:12 2010
> Frequency: Once a day.
> HibernationDevice: RESUME=UUID=a0a67dc1-f975-484f-8666-4097a1b81276
> InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
> MachineType: Dell Inc. XPS M1330
> ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-23-generic
> root=UUID=84ef7af6-2c90-4015-834c-f0fefb44c0a9 ro quiet splash
> ProcEnviron:
> PATH=(custom, user)
> LANG=en_CA.utf8
> SHELL=/bin/bash
> RelatedPackageVersions: linux-firmware 1.34.1
> SourcePackage: linux
> dmi.bios.date: 11/19/2008
> dmi.bios.vendor: Dell Inc.
> dmi.bios.version: A14
> dmi.board.vendor: Dell Inc.
> dmi.chassis.type: 8
> dmi.chassis.vendor: Dell Inc.
> dmi.modalias:
> dmi:bvnDellInc.:bvrA14:bd11/19/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
> dmi.product.name: XPS M1330
> dmi.sys.vendor: Dell Inc.
>
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>