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Shepard4711

2 Posts

26904

October 15th, 2008 11:00

No sound after kernel update

Hi,

After installing the latest Ubuntu package updates this morning (which contained kernel updates and therefore required a restart - kernel version is now 2.6.24-21-generic) I noticed the sound stopped working. That is, I couldn't open the sound mixer. Before that I hadn't done a reboot for at least 3 days and there were some other package updates inbetween but it seems more logical that the kernel update caused it. I didn't change anything else in the system, as far as I'm aware.

Anyway, further investigation showed that the sound chip isn't installed / recognised anymore:

simon@copperhead:/dev$ cat /proc/asound/cards
--- no soundcards ---

However it is still listed in lspci:

simon@copperhead:/dev$ lspci | grep -i audio
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 02)

My laptop is the Inspiron 1525 with Ubuntu pre-installed. Is anyone else having this problem? Any clues what might have gone wrong here? Any pointers how to re-install it?

Thanks

haiko2201

2 Posts

October 16th, 2008 22:00

Message Edited by haiko2201 on 10-16-2008 06:05 PM

StewartMM

9 Posts

October 16th, 2008 23:00

@tanya_814 wrote:

Wow, thank you so much for the visuals.

That was very helpful.

I followed everything you said, except I opened the 'hda' file, and it had nothing in it. 

I might have deleted it by accident without knowing it, while I was typing in all those terminal codes. 

Is there any way for me to retrieve it?

There was a 'snd-hda-intel.ko' file in the 19-generic but I tried using that (19 instead of 21) and it didn't work. 

(I'm guessing because I'm already upgraded to 21? ...I thought I would try anyway)

 

Any suggestions on what to do here? 

 

 

Whoa. The folder /lib/modules/2.6.24-21-generic/ubuntu/sound/alsa-driver/pci/hda had nothing in it?

 

I take it you've tried copying and pasting the same driver from 19-generic (same location) and it didn't work. That's not terribly surprising.

 

1) Does sound work when you boot to 2.6.24-19-generic? Have you tried that? (No, what you have done should not mess up the sound).

 

I think that would be is a command that should unpackage and recreate the snd-hda-intel.ko file in 2.6.24-21-generic, even if it's got the REPLACEDBYhsfmodem appended to the end of it. But I don't know it right off the top of my head. I'll ask a Linux guru friend (he's an Ubuntu beta tester).

 

I see you've posted this on the Ubuntu forums when I was googling this problem for you on how to recreate it. I think someone there will know the answer.

 

StewartM

tanya_814

6 Posts

October 17th, 2008 00:00

I havn't tried copy/pasting. Didn't think it would be the same file. I guess I'll try it.

The sound *does* work on 19. I'm on it now. 

 

Thanks for all your help so far! 

I'll be waiting to see what you find out from your friend...

StewartMM

9 Posts

October 17th, 2008 13:00

@tanya_814 wrote:

I havn't tried copy/pasting. Didn't think it would be the same file. I guess I'll try it.

The sound *does* work on 19. I'm on it now. 

 

Thanks for all your help so far! 

I'll be waiting to see what you find out from your friend...

I just talked to him. If there is no snd-hda-intel.ko file in that directory, the easiest thing to do would be for me to email you mine from my working version of 2.6.24-21. That I am willing to do. Just paste it into that directory.

 

To make the copy-and-paste task easier, you can open up a terminal (in a  user with admin rights) and enter:

 

gksudo nautilus

 

You'll be prompted for your password, and a file manager window will pop up.*Within that window only* you'll have administrative privileges. You can use that window to navigate to the /lib/modules/2.6.24-21-generic/ubuntu/sound/alsa-driver/pci/hda folder. and paste the new file within that.

 

You can then, using the same window, navigate to the /lib/modules/2.6.24-21-generic/updates folder and make sure that the wrong files *aren't there*.

 

Then run the last three steps in the terminal:

 

$ sudo depmod -a
$ sudo update-initramfs -u
$ sudo reboot

And hopefully you'll be there.

 

I'll need an email address to mail you my snd-hda-intel.ko file. You are using a Dell Inspiron 1525N aren't you?

 

StewartM

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