[Bug 586592] [NEW] Wifi spontaneously stops working, kacpid uses 100% cpu

[rfugger]

Public bug reported:

Over the past week I've experienced three episodes where my wifi
[seemingly] spontaneously stopped working and kacpid simultaneously
began using 100% cpu.  I have an HP 530 laptop running 10.04 and kernel
2.6.32-22-generic.  This wasn't happening with the previous kernel, so I
can only guess that it's a regression in the latest kernel update.

When I reboot, things are back to normal.  Doing a suspend then resume
fixes the kacpid but not the wifi, even if I disable and re-enable
wireless in the network manager.

I had a similar issue on a different machine a couple years ago
(intrepid-jaunty-?), which I think went away with a kernel upgrade.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-2.6.32-22-generic 2.6.32-22.33
Regression: Yes
Reproducible: No
ProcVersionSignature: Ubuntu 2.6.32-22.33-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  ryan       1210 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf0580000 irq 16'
   Mixer name	: 'Conexant CX20549 (Venice)'
   Components	: 'HDA:14f15045,103c30d5,00100100'
   Controls      : 19
   Simple ctrls  : 9
Date: Thu May 27 15:28:06 2010
Frequency: Once every few days.
HibernationDevice: RESUME=UUID=e77e9f1b-9578-4b99-b3be-fa78b397d662
Lsusb:
 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Hewlett-Packard HP 530 Notebook PC(KD097AT#ABA)
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcCmdLine: root=UUID=43db4500-0dfb-4628-8fc8-5466d13a2321 ro quiet splash
ProcEnviron:
 PATH=(custom, user)
 LANG=en_CA.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.34
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
WpaSupplicantLog:
 
dmi.bios.date: 03/18/2008
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68MVU Ver. F.07
dmi.board.name: 30D5
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 82.15
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68MVUVer.F.07:bd03/18/2008:svnHewlett-Packard:pnHP530NotebookPC(KD097AT#ABA):pvrF.07:rvnHewlett-Packard:rn30D5:rvrKBCVersion82.15:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP 530 Notebook PC(KD097AT#ABA)
dmi.product.version: F.07
dmi.sys.vendor: Hewlett-Packard

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


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

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Wifi spontaneously stops working, kacpid uses 100% cpu
https://bugs.launchpad.net/bugs/586592
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