[Bug 564736] [NEW] Ondemand frequency scaling becomes stuck at 800Mhz in lucid

[Doug McMahon]

Public bug reported:

In 2.6.32-20 and 2.6.32-21 frequency scaling somewhat at random becomes non functional, though it seems most likely to occur on the first boot.
A reboot to recovery usually will restore proper function though not always.

While I only know of a couple of users that have reported the same it's
quite likely more widespread without notice except for complaints of
poorer performance.

Can be clearly seen here - other than the initial performance mode from
boot has been at 800 ever since, even when doing things that would need
a higher freq.

time_in_state
2201000 8022
2200000 516
1600000 2
1200000 0
800000 419920

total_trans
4
The freq can be manually changed though that's not a viable option longterm

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-21-generic 2.6.32-21.31
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.32-21.31-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-21-generic i686
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  doug       1346 F.... 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: Fri Apr 16 10:30:27 2010
HibernationDevice: RESUME=UUID=7da52543-f741-4edc-84dd-605c3d2b401b
InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Beta i386 (20100406.1)
MachineType: Dell Inc. XPS M1330
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-21-generic root=UUID=99548c63-8904-4f2b-b4cc-fa34375f8774 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
SourcePackage: linux
dmi.bios.date: 12/26/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A15
dmi.board.name: 0U8042
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA15:bd12/26/2008:svnDellInc.:pnXPSM1330:pvr:rvnDellInc.:rn0U8042:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: XPS M1330
dmi.sys.vendor: Dell Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386 lucid needs-upstream-testing regression-release

-- 
Ondemand frequency scaling becomes stuck at 800Mhz in lucid
https://bugs.launchpad.net/bugs/564736
You received this bug notification because you are a member of Kernel
Bugs, which is subscribed to linux in ubuntu.