Dell XPS M1330 CPU scales down to 800 MHz
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Expired
|
Undecided
|
Unassigned |
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-
Regression: No
Reproducible: No
ProcVersionSign
Uname: Linux 2.6.32-23-generic x86_64
NonfreeKernelMo
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
/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,
Controls : 28
Simple ctrls : 18
Date: Wed Jul 14 09:08:12 2010
Frequency: Once a day.
HibernationDevice: RESUME=
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
MachineType: Dell Inc. XPS M1330
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
PATH=(custom, user)
LANG=en_CA.utf8
SHELL=/bin/bash
RelatedPackageV
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.
dmi.product.name: XPS M1330
dmi.sys.vendor: Dell Inc.
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 output. txt
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_
Once powertop stops, please attach the powertop_output.txt file from your home directory into this bug.