Re: 2.6.24-rc2 breaks nVidia MCP51 High Definition Audio

At Wed, 7 Nov 2007 19:07:07 -0500 (EST),
Gerhard Mack wrote:

On Wed, 7 Nov 2007, Andrew Morton wrote:

Date: Wed, 7 Nov 2007 15:21:27 -0800
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
To: Gerhard Mack <gmack@xxxxxxxxxxxxx>
Cc: linux-kernel@xxxxxxxxxxxxxxx, Jaroslav Kysela <perex@xxxxxxx>,
Takashi Iwai <tiwai@xxxxxxx>, Rafael J. Wysocki <rjw@xxxxxxx>
Subject: Re: 2.6.24-rc2 breaks nVidia MCP51 High Definition Audio

On Wed, 7 Nov 2007 17:39:41 -0500 (EST) Gerhard Mack <gmack@xxxxxxxxxxxxx> wrote:
hello,

This worked fine in 2.6.23 but now the kernel no longer sees my audio
controller.

00:10.1 Audio device: nVidia Corporation MCP51 High Definition Audio (rev
a2)
00:10.1 0403: 10de:026c (rev a2)

Let me know if I can provide more info or test patches.


Please provide the output of `dmesg -s 1000000' for both 2.6.23
and 2.6.24-rc3, thanks.

Are you sure that the driver is suitably configured? Sometimes
we like to fiddle config options so that a `make oldconfig' will go and
unconfigure drivers which you need.

Found an option for generic HD audio and enabled that with only marginally
better results. Now instead of not detecting my card it's showing a
single volume control in the mixer and not providing any sound at all.

2.6.23:
Advanced Linux Sound Architecture Driver Version 1.0.14 (Fri Jul 20
09:12:58 2007 UTC).
ACPI: PCI Interrupt Link [AAZA] enabled at IRQ 22
ACPI: PCI Interrupt 0000:00:10.1[B] -> Link [AAZA] -> GSI 22 (level, low)
-> IRQ 22
PCI: Setting latency timer of device 0000:00:10.1 to 64
ALSA device list:
#0: HDA NVidia at 0xfe024000 irq 22
GACT probability on

2.6.24-rc2:
Advanced Linux Sound Architecture Driver Version 1.0.15 (Tue Oct 23
06:09:18 2007 UTC).
ACPI: PCI Interrupt Link [AAZA] enabled at IRQ 22
ACPI: PCI Interrupt 0000:00:10.1[B] -> Link [AAZA] -> GSI 22 (level, low)
-> IRQ 22
PCI: Setting latency timer of device 0000:00:10.1 to 64
ieee1394: Host added: ID:BUS[0-00:1023] GUID[0011d8000101f761]
ALSA device list:
#0: HDA NVidia at 0xfe024000 irq 22
GACT probability on

Both look OK.

Please show your kernel config and /proc/asound/card0/codec#*
contents. Did you choose CONFIG_SND_HDA_CODEC_* properly?

Also, please be more specific about your hardware. The implementation
of HD-audio stuff is deifferent greatly among products. It's very
important to know what kind of machine (h/w vendor, product name,
model, etc) to identify whether the configuration is known or not
(i.e. it was really supported or it worked just casually).


Takashi
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