No sound with Realtek ALC268 using ALSA [Solved]

[speck]

I can't get any sound in my laptop, model HP dv6985se. My sound card is:

cat /proc/asound/card0/codec#0 | grep Codec
Codec: Realtek ALC268

And this is the lspci command result:

00:00.0 Host bridge: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)
00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c)
00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 (rev 03)
00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 (rev 03)
00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 (rev 03)
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)
00:1c.0 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 (rev 03)
00:1c.1 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 2 (rev 03)
00:1c.5 PCI bridge: Intel Corporation 82801H (ICH8 Family) PCI Express Port 6 (rev 03)
00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 (rev 03)
00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 (rev 03)
00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 (rev 03)
00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 (rev 03)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev f3)
00:1f.0 ISA bridge: Intel Corporation 82801HEM (ICH8M) LPC Interface Controller (rev 03)
00:1f.1 IDE interface: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) IDE Controller (rev 03)
00:1f.2 SATA controller: Intel Corporation 82801HBM/HEM (ICH8M/ICH8M-E) SATA AHCI Controller (rev 03)
00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller (rev 03)
02:00.0 Network controller: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61)
08:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 01)
09:09.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 05)
09:09.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
09:09.2 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12)
09:09.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12)
09:09.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev ff)

I'm updated and using the latest sabayon but the problem remain.

How can we solve this?

Thanks for help.

[Fitzcarraldo]

Have you already tried the alsaconf then alsamixer commands as root user in a Terminal/Konsole window? See also the thread viewtopic.php?f=56&t=16799&p=96044&hilit=Realtek+ALC268#p96044 which may be of help.

[speck]

Ok, now the sound works. Very thanks!

Only one question: KDE still show one message at start saying: "ALC268 does not work, falling to PulseAudio"...

[Fitzcarraldo]

Probably a bug of some kind, but if your audio is now working I wouldn't worry about it. Audio in Linux is a minefield: just take a look at the diagram on the PulseAudio page in Wikipedia and you'll see what I mean. There's more than a little truth in Linux Hater's article on PulseAudio: Pulse my audio.

[kodiakmax]

pulseaudio is super new at the moment. a lot of people have problems with it. But if your audio is working I would ignore it. Your system is probably just falling back to a different backend like gstreamer or xine or something. "If it ain't broke don't fix it" hehe.

[joeoden]

Only one question: KDE still show one message at start saying: "ALC268 does not work, falling to PulseAudio"...

A workaround for those people who are getting the message at start saying:
that your Model of sound card does not work, falling to whatever is next on the list

If your sound is working when the sound system falls back, then to stop message from appearing at start-up, try this;

Open System Settings
Double click Multimedia
Select Audio Output
Select the first item
Click on Defer
Click on Apply Device List To...
Ensure that all items are selected in the dialog window that appears and click OK
Click Apply

Example my system on start-up "ALC662 Analog does not work, falling to ALC662 Digital"
So I open System Settings - Multimedia (as user), select Audio Output (the first item on left-hand side of Multimedia window) then I select (right-hand side of window) HDA NVidia (ALC662 Analog), then click on Defer, Click on Apply Device List To... and finally Apply. Then close all open windows and reboot

It works for me
Have fun
Joe

[speck]

Good job joeoden, very thanks, I think this really solve the problem of most people.

In my case, I have tried this, but my other option is PulseAudio... and the result is horrible.

[joeoden]

I think this really solve the problem of most people

Just been reading
viewtopic.php?f=56&t=17169#p98387

Check out this link Fitzcarraldo has given (is a must read)
http://ubuntuforums.org/showthread.php?t=843012

Thanks Fitzcarraldo the link will let me have lots more fun
Joe