Strange noise at shutdown, reboot or sleep

[elodie]

Binary package hint: linux-image

The bug appeared when I tried to upgrade my ubuntu from maverick to natty. My kernel under maverick is 2.6.35, the kernel under natty was 2.6.38.

Description of the bug : the computer works perfectly fine, but when I shut it down, there is a loud "crack" (not a beep) at the very end of the process. It is probably not a speakers cracking, because I have tried it with external speakers, and the sound still came from the computer. It does the same for hibernation or sleep, except that the noise is done twice when put to sleep. The noise appears too with the natty live-cd (when I shut down, it appears just after removing the cd).

I think it is a kernel bug, because when I boot on a older kernel (grub still proposes old versions), there is no problem. I tried installing 2.6.39 to see if it helped, but the noise is still there.

I am using a HP Pavilion DV6000 laptop (dual boot ubuntu/vista).

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image (not installed)
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-29.51-generic 2.6.35.12
Uname: Linux 2.6.35-29-generic i686
NonfreeKernelModules: wl
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
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: elodie 1691 F.... pulseaudio
 /dev/snd/pcmC0D0p: elodie 1691 F...m pulseaudio
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd8240000 irq 43'
   Mixer name : 'Conexant CX20549 (Venice)'
   Components : 'HDA:14f15045,103c30bb,00100100'
   Controls : 18
   Simple ctrls : 8
Date: Fri Jun 3 13:22:25 2011
HibernationDevice: RESUME=UUID=65206a9c-7a03-417d-b282-6e28b48bcc0b
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007)
MachineType: Hewlett-Packard HP Pavilion dv6000 (GH906EA#ABF)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-29-generic root=UUID=1a5248a9-1dbd-442d-94fb-9d0d9e48f0b8 ro quiet splash
ProcEnviron:
 LANGUAGE=fr_FR:en
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38.8
RfKill:
 0: hp-wifi: Wireless LAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
dmi.bios.date: 05/12/2007
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.25
dmi.board.name: 30BB
dmi.board.vendor: Quanta
dmi.board.version: 66.3D
dmi.chassis.type: 10
dmi.chassis.vendor: Quanta
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.25:bd05/12/2007:svnHewlett-Packard:pnHPPaviliondv6000(GH906EA#ABF):pvrRev1:rvnQuanta:rn30BB:rvr66.3D:cvnQuanta:ct10:cvrN/A:
dmi.product.name: HP Pavilion dv6000 (GH906EA#ABF)
dmi.product.version: Rev 1
dmi.sys.vendor: Hewlett-Packard

[elodie (elodieb)]

(I forgot to tell, I downgraded to maverick because I feared the bug could harm the computer, so I am posting this bug report from maverick whereas the problem is on natty, I don't know if it affect the collected information, but I prefer telling you)

[elodie (elodieb)]

I come again to give some more information. I upgraded to oneric ocelot, then precise pangolin, and the bug is still there. But I just discovered that it is an audio problem.

When you plug external speakers not before the shutdown, but during the shutdown, the sound comes from the external speakers, and not from the computer. And regularly, plugging external speakers makes the cracking sound appear.

I tried staying on lucid lynx's kernel, it solves the problem. Uninstalling alsa solves the problem too (but oss4 does not work on my computer).

I think it is a matter of correctly shutting down the speakers before shutting down the computer, but I have no idea how to do that.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[penalvch (penalvch)]

elodie, this report has had any activity in a while. Would this still be an issue for you? If so, could you please provide the full computer model as noted on the sticker of the computer itself (not from the Bug Description)?

[elodie (elodieb)]

Sorry, I thought I had reported months ago that this was no longer an issue for me, but it seems I had not... The last LTS fixed this completely for me.

[penalvch (penalvch)]

elodie, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/linux/+bug/792318/comments/6 regarding this being fixed with an update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.