I had resumed my laptop for the first time today after upgrading to 12.10 and have noticed that the system was not responsive. I turned out that CPU scaling max frequency (/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq) was 800000 (should be 2133000). I tried to change the governor to performance, but the freq was still locked at min. I also tried to echo the max freq to /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq, but it also did nothing.
I am yet to see whether this is repeatable, I wanted to report the bug first with all the sensitive logs before I restart the system and try again. I will report back here later.
ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: linux-image-generic 3.5.0.14.14
ProcVersionSignature: Ubuntu 3.5.0-14.19-generic 3.5.3
Uname: Linux 3.5.0-14-generic x86_64
AcpiTables: Error: [Errno 13] Permission denied
ApportVersion: 2.5.1-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: cromo 14022 F.... pulseaudio
/dev/snd/pcmC0D0p: cromo 14022 F...m pulseaudio
Date: Sat Sep 15 19:48:03 2012
HibernationDevice: RESUME=UUID=4da1c619-669e-4d7c-9cef-ffb960bd2aa8
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Beta amd64 (20100902.1)
MachineType: Dell Inc. Latitude E6400
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-14-generic root=UUID=c0ac5e9b-4a61-4d91-a546-5379b9ba2edb ro ipv6.disable=1 quiet splash elevator=deadline vt.handoff=7
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory /home/cromo not ours.
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.5.0-14-generic N/A
linux-backports-modules-3.5.0-14-generic N/A
linux-firmware 1.92
SourcePackage: linux
StagingDrivers: zram
UpgradeStatus: Upgraded to quantal on 2012-09-14 (0 days ago)
dmi.bios.date: 02/16/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A28
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA28:bd02/16/2011:svnDellInc.:pnLatitudeE6400:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E6400
dmi.sys.vendor: Dell Inc.
Actually, this turned out to be hardware issue and not Ubuntu's fault. It very rarely happens that the power adapter is not recognized and the outcome is the CPU freq locked to minimum. I found out about it after rebooting when appropriate message was shown. For the sake of certainty I suspended and resumed the system afterwards and CPU freq was fine.