F10: new kernel breaks audio (snd-hda-intel)

[Paulo Cavalcanti]

On Fri, Dec 26, 2008 at 4:32 PM, Alfredo Ferrari <list at pceet030.cern.ch>wrote:

> Hi
>
> I have a Dell D830, with F10 fully up-to-date. The kernel update of two
> days ago (2.6.27.9-159.fc10) has broken audio on this machine.
>
> If I reboot on the previous kernel, 2.6.27.7-134.fc10, audio works like a
> charm. With the new kernel everything works with no error message, however
> no sound is output, like the volume is muted or set to very low values.
> I have checked all volume sliders, both for pulseaudio and alsa and all of
> them are at maximum and unmuted. I am using the PAE kernel if that matters.
>
> The audio driver is snd-hda-intel, and the output of lspci -v reads:
>
> 00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio
> Controller (rev 02)
>         Subsystem: Dell Device 01fe
>        Flags: bus master, fast devsel, latency 0, IRQ 21
>        Memory at f6ffc000 (64-bit, non-prefetchable) [size=16K]
>        Capabilities: [50] Power Management version 2
>        Capabilities: [60] Message Signalled Interrupts: Mask- 64bit+
> Count=1/1 Enable-
>        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
>        Capabilities: [100] Virtual Channel <?>
>        Capabilities: [130] Root Complex Link <?>
>        Kernel driver in use: HDA Intel
>        Kernel modules: snd-hda-intel
>
> Is anybody else having the same problem?
>
>


Yes. I had the same problem when I upgraded to alsa 1.0.18
(kernel 159 comes with alsa 1.0.18a and 134 with alsa 1.0.17).

The fix for my card is available in the latest alsa tarball. Unfortunately,
it is
not compiling anymore for the new kernel, due to some symbols that appeared
in the new kernel (back ported from kernel 2.6.28, I guess).
The official fix should come in the next alsa release.


-- 
Paulo Roma Cavalcanti
LCG - UFRJ
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