i810 sound broken...

i810 sound broken...

[Thomas Munck Steenholdt]

I've noticed some writing on lkml on how i810(AC97) sound was broken. Aparantly a couple of fixes have been posted, but I couldn't see where(if at all) those patches have gone... 2.4.19 still does not work and 2.4.19-ac3 won't even load the i810 module.

Does anybody know if the known i810 sound issue has, in fact, been fixed, and if so - in what kernel/patch?

rgds, Thomas

-- Send gratis SMS og brug gratis e-mail på Everyday.com -- 

Re: i810 sound broken...

[Alan Cox]

On Mon, 2002-08-05 at 12:27, Thomas Munck Steenholdt wrote:
> I've noticed some writing on lkml on how i810(AC97) sound was broken. 
> Aparantly a couple of fixes have been posted, but I couldn't see
> where(if at all) those patches have gone... 2.4.19 still does not work
> and 2.4.19-ac3 won't even load the i810 module.
> 
> Does anybody know if the known i810 sound issue has, in fact, been fixed, and if so - in what kernel/patch?

Its working nicely for me in 2.4.19 and 2.4.19-ac1. The 2.4.19-ac3 tree
has a bug in pci_enable_device which will stop it working if built with
some compilers (by chance it works ok the way I tested it). Thats fixed
in ac4.

The changes in the recent i810 audio are
- Being more pessimistic in our interpretation of codec power up
- Turning on EAPD in case the BIOS didn't do so at boot up

Longer term full EAPD control as we do with the cs46xx is on my list,
paticularly as i8xx laptops are becoming common . (EAPD is the amplifier
power controller)

Re: i810 sound broken...

[venom]

Still OSS modules for i810 does not work with 2.5 kernels, actually 2.4
is fine. No time to switch to alsa (and not interested for now too).



On 5 Aug 2002, Alan Cox wrote:

> Date: 05 Aug 2002 13:54:17 +0100
> From: Alan Cox <alan@lxorguk.ukuu.org.uk>
> To: Thomas Munck Steenholdt <tmus@get2net.dk>
> Cc: linux-kernel@vger.kernel.org
> Subject: Re: i810 sound broken...
>
> On Mon, 2002-08-05 at 12:27, Thomas Munck Steenholdt wrote:
> > I've noticed some writing on lkml on how i810(AC97) sound was broken.
> > Aparantly a couple of fixes have been posted, but I couldn't see
> > where(if at all) those patches have gone... 2.4.19 still does not work
> > and 2.4.19-ac3 won't even load the i810 module.
> >
> > Does anybody know if the known i810 sound issue has, in fact, been fixed, and if so - in what kernel/patch?
>
> Its working nicely for me in 2.4.19 and 2.4.19-ac1. The 2.4.19-ac3 tree
> has a bug in pci_enable_device which will stop it working if built with
> some compilers (by chance it works ok the way I tested it). Thats fixed
> in ac4.
>
> The changes in the recent i810 audio are
> - Being more pessimistic in our interpretation of codec power up
> - Turning on EAPD in case the BIOS didn't do so at boot up
>
> Longer term full EAPD control as we do with the cs46xx is on my list,
> paticularly as i8xx laptops are becoming common . (EAPD is the amplifier
> power controller)
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>

Re: i810 sound broken...

[Alan Cox]

On Mon, 2002-08-05 at 14:47, venom@sns.it wrote:
> Still OSS modules for i810 does not work with 2.5 kernels, actually 2.4
> is fine. No time to switch to alsa (and not interested for now too).

OSS for 2.5 is someone elses problem. I have no plan to do any work on
the old OSS drivers for the 2.5 tree or even to submit 2.4 updates into
2.5 for it. 

Re: i810 sound broken...

[Thomas Munck Steenholdt]

On Mon, 2002-08-05 at 17:28, Alan Cox wrote:
> On Mon, 2002-08-05 at 14:47, venom@sns.it wrote:
> > Still OSS modules for i810 does not work with 2.5 kernels, actually 2.4
> > is fine. No time to switch to alsa (and not interested for now too).
> 
> OSS for 2.5 is someone elses problem. I have no plan to do any work on
> the old OSS drivers for the 2.5 tree or even to submit 2.4 updates into
> 2.5 for it. 
> 

So anyway - How should I go about determining the exact problem on my
box... I've had it all along, and I know for a fact that the hardware is
OK... Modules are loaded correctly, but it just does not work!

Thomas

Re: i810 sound broken...

[Jeff Chua]

On 5 Aug 2002, Thomas Munck Steenholdt wrote:

> So anyway - How should I go about determining the exact problem on my
> box... I've had it all along, and I know for a fact that the hardware is
> OK... Modules are loaded correctly, but it just does not work!

Try me ...
download aumix from http://jpj.net/~trevor/aumix/aumix-2.7.tar.gz
and drag "Vol" and "Pcm" to appropriate level before you play any sound.

Jeff

Re: i810 sound broken...

[Doug Ledford]

On Mon, Aug 05, 2002 at 08:38:52PM +0200, Thomas Munck Steenholdt wrote:
> On Mon, 2002-08-05 at 17:28, Alan Cox wrote:
> > On Mon, 2002-08-05 at 14:47, venom@sns.it wrote:
> > > Still OSS modules for i810 does not work with 2.5 kernels, actually 2.4
> > > is fine. No time to switch to alsa (and not interested for now too).
> > 
> > OSS for 2.5 is someone elses problem. I have no plan to do any work on
> > the old OSS drivers for the 2.5 tree or even to submit 2.4 updates into
> > 2.5 for it. 
> > 
> 
> So anyway - How should I go about determining the exact problem on my
> box... I've had it all along, and I know for a fact that the hardware is
> OK... Modules are loaded correctly, but it just does not work!

I'll tell you what you can do.  Grab some ICH docs so you have a list of 
the valid regs on the i810 sound chip.  Then, go into i810_audio.c and 
write me up a little hack that, at the end of the chip init sequence, 
whill dump the state of all the regs on the chip.  Make it smart enough to 
know about different regs on different chips (aka, Intel ICH0 and ICH1 
will probably have a slightly different reg setup than the ICH2 and 
later).  Then, load that driver on your machine and get me that register 
dump.  Then, I'll take the patch and apply it here on the i810 machines I 
have that do work and get their register dump.  We'll see then where the 
differences are.  On the i845 based machine I have at work, where the 
sound doesn't work just like you describe, I've isolated the problem down 
to the fact that when we start the DMA engine it *immediately* signals 
that it has already finished the DMA process and has already stopped again 
but it never actually does the DMA.  So, I suspect there is some config 
bit somewhere set wrong and the DMA is not taking place as a result (hell, 
for all I know, the AC97 link for sound output may be off or something 
like that).  Getting a register dump from several busted machines as well 
as from some working machines should enable me to solve the problem 
relatively easily.  I just haven't had the time to write the patch myself 
and do any more work on the thing :-(

-- 
  Doug Ledford <dledford@redhat.com>     919-754-3700 x44233
         Red Hat, Inc. 
         1801 Varsity Dr.
         Raleigh, NC 27606
  

Re: i810 sound broken...

[Juergen Sawinski]

On Wed, 2002-08-07 at 17:05, Doug Ledford wrote:
> On Mon, Aug 05, 2002 at 08:38:52PM +0200, Thomas Munck Steenholdt wrote:
> > On Mon, 2002-08-05 at 17:28, Alan Cox wrote:
> > > On Mon, 2002-08-05 at 14:47, venom@sns.it wrote:
> > > > Still OSS modules for i810 does not work with 2.5 kernels, actually 2.4
> > > > is fine. No time to switch to alsa (and not interested for now too).
> > > 
> > > OSS for 2.5 is someone elses problem. I have no plan to do any work on
> > > the old OSS drivers for the 2.5 tree or even to submit 2.4 updates into
> > > 2.5 for it. 
> > > 
> > 
> > So anyway - How should I go about determining the exact problem on my
> > box... I've had it all along, and I know for a fact that the hardware is
> > OK... Modules are loaded correctly, but it just does not work!
> 
> I'll tell you what you can do.  Grab some ICH docs so you have a list of 
> the valid regs on the i810 sound chip.  Then, go into i810_audio.c and 
> write me up a little hack that, at the end of the chip init sequence, 
> whill dump the state of all the regs on the chip.  Make it smart enough to 
> know about different regs on different chips (aka, Intel ICH0 and ICH1 
> will probably have a slightly different reg setup than the ICH2 and 
> later).  Then, load that driver on your machine and get me that register 
> dump.  Then, I'll take the patch and apply it here on the i810 machines I 
> have that do work and get their register dump.  We'll see then where the 
> differences are.  On the i845 based machine I have at work, where the 
> sound doesn't work just like you describe, I've isolated the problem down 
> to the fact that when we start the DMA engine it *immediately* signals 
> that it has already finished the DMA process and has already stopped again 
> but it never actually does the DMA.  So, I suspect there is some config 
> bit somewhere set wrong and the DMA is not taking place as a result (hell, 
> for all I know, the AC97 link for sound output may be off or something 
> like that).  Getting a register dump from several busted machines as well 
> as from some working machines should enable me to solve the problem 
> relatively easily.  I just haven't had the time to write the patch myself 
> and do any more work on the thing :-(

My i845 box seems to only have a tertiary codec (waiting for
verification from Intel) which is only accesible via DMA. I already
started to make this work... hope, I can show some code end of the week.

But there's sth. about i810_ac97_get. The ICH4 manual says, reads _must
not_ cross DWord boundaries. Could there be a problem? 

> -- 
>   Doug Ledford <dledford@redhat.com>     919-754-3700 x44233
>          Red Hat, Inc. 
>          1801 Varsity Dr.
>          Raleigh, NC 27606
>   
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
-- 
Juergen Sawinski
Max-Planck-Institute for Medical Research
Dept. of Biomedical Optics
Jahnstr. 29
D-69120 Heidelberg
Germany

Phone:  +49-6221-486-309
Fax:    +49-6221-486-325

priv.
Phone:  +49-6221-418 848
Mobile: +49-171-532 5302

Re: i810 sound broken...

[Doug Ledford]

[-- Attachment #1: Type: text/plain, Size: 1006 bytes --]

On Wed, Aug 07, 2002 at 08:49:08PM +0200, Juergen Sawinski wrote:
> My i845 box seems to only have a tertiary codec (waiting for
> verification from Intel) which is only accesible via DMA. I already
> started to make this work... hope, I can show some code end of the week.
> 
> But there's sth. about i810_ac97_get. The ICH4 manual says, reads _must
> not_ cross DWord boundaries. Could there be a problem? 

Actually, I just solved an i845 issue here.  I have a patch that should 
enable yours to work I think.  It's against the i810_audio.c driver in 
Alan's current tree.  I've attached that patch.  If the patch doesn't work 
for you, the complete source code can be found at 
http://people.redhat.com/dledford/i810_audio.c.gz (shift-click on the link 
in a browser to get it to download the file cleanly).  Drop that source in 
place and use it to test.

-- 
  Doug Ledford <dledford@redhat.com>     919-754-3700 x44233
         Red Hat, Inc. 
         1801 Varsity Dr.
         Raleigh, NC 27606
  

[-- Attachment #2: i810-0.22.patch.gz --]
[-- Type: application/x-gzip, Size: 3109 bytes --]

Re: i810 sound broken...

[Alexander Hoogerhuis]

Different thing about 810, brand spanking new Compaq
Game^H^H^H^Hlaptop and it gives good sound, but shows this on boot:

i810: Intel ICH3 found at IO 0x4400 and 0x4000, IRQ 5
i810_audio: Audio Controller supports 6 channels.
ac97_codec: AC97 Audio codec, id: 0x4144:0x5363 (Unknown)
i810_audio: AC'97 codec 0 Unable to map surround DAC's (or DAC's \
not present), total channels = 2

lspci -vvv shows this:

00:1f.5 Multimedia audio controller: Intel Corp. 82801CA/CAM AC'97 Audio (rev 02)
	Subsystem: Compaq Computer Corporation: Unknown device 004a
	Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
	Status: Cap- 66Mhz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
	Latency: 0
	Interrupt: pin B routed to IRQ 5
	Region 0: I/O ports at 4000 [size=256]
	Region 1: I/O ports at 4400 [size=64]

Under Windows XP it likes to call itself a SoundMAX device.

Hope its of help?

ttfn,
A

Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> On Mon, 2002-08-05 at 14:47, venom@sns.it wrote:
> > Still OSS modules for i810 does not work with 2.5 kernels, actually 2.4
> > is fine. No time to switch to alsa (and not interested for now too).
> 
> OSS for 2.5 is someone elses problem. I have no plan to do any work on
> the old OSS drivers for the 2.5 tree or even to submit 2.4 updates into
> 2.5 for it. 
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/

-- 
Alexander Hoogerhuis                               | alexh@ihatent.com
CCNP - CCDP - MCNE - CCSE                          | +47 908 21 485
"You have zero privacy anyway. Get over it."  --Scott McNealy

Re: i810 sound broken...

[Alan Cox]

On Mon, 2002-08-05 at 22:38, Alexander Hoogerhuis wrote:
> 
> Different thing about 810, brand spanking new Compaq
> Game^H^H^H^Hlaptop and it gives good sound, but shows this on boot:
> 
> i810: Intel ICH3 found at IO 0x4400 and 0x4000, IRQ 5
> i810_audio: Audio Controller supports 6 channels.
> ac97_codec: AC97 Audio codec, id: 0x4144:0x5363 (Unknown)
> i810_audio: AC'97 codec 0 Unable to map surround DAC's (or DAC's \
> not present), total channels = 2

Thats fine. Your chipset supports 6 channel surround sound. Your vendor
didn't feel the need to fit codecs for anything more than stereo

Re: i810 sound broken...

[Alexander Hoogerhuis]

Alan Cox <alan@lxorguk.ukuu.org.uk> writes:

> On Mon, 2002-08-05 at 22:38, Alexander Hoogerhuis wrote:
> > 
> > Different thing about 810, brand spanking new Compaq
> > Game^H^H^H^Hlaptop and it gives good sound, but shows this on boot:
> > 
> > i810: Intel ICH3 found at IO 0x4400 and 0x4000, IRQ 5
> > i810_audio: Audio Controller supports 6 channels.
> > ac97_codec: AC97 Audio codec, id: 0x4144:0x5363 (Unknown)
> > i810_audio: AC'97 codec 0 Unable to map surround DAC's (or DAC's \
> > not present), total channels = 2
> 
> Thats fine. Your chipset supports 6 channel surround sound. Your vendor
> didn't feel the need to fit codecs for anything more than stereo
> 

Anyone feeling they need the codes IDs to add to some database so they
dont remain "unknown"?

mvh,
A
-- 
Alexander Hoogerhuis                               | alexh@ihatent.com
CCNP - CCDP - MCNE - CCSE                          | +47 908 21 485
"You have zero privacy anyway. Get over it."  --Scott McNealy

Re: i810 sound broken...

[Juergen Sawinski]

On my Intel D845GBV board (obviously ICH4) none of 2.4 nor alsa works.
It's a production box, so I hestitate to try 2.5.

George

P.S.: Alan, any hints how I can examine/fix this?


On Mon, 2002-08-05 at 14:54, Alan Cox wrote:
> On Mon, 2002-08-05 at 12:27, Thomas Munck Steenholdt wrote:
> > I've noticed some writing on lkml on how i810(AC97) sound was broken. 
> > Aparantly a couple of fixes have been posted, but I couldn't see
> > where(if at all) those patches have gone... 2.4.19 still does not work
> > and 2.4.19-ac3 won't even load the i810 module.
> > 
> > Does anybody know if the known i810 sound issue has, in fact, been fixed, and if so - in what kernel/patch?
> 
> Its working nicely for me in 2.4.19 and 2.4.19-ac1. The 2.4.19-ac3 tree
> has a bug in pci_enable_device which will stop it working if built with
> some compilers (by chance it works ok the way I tested it). Thats fixed
> in ac4.
> 
> The changes in the recent i810 audio are
> - Being more pessimistic in our interpretation of codec power up
> - Turning on EAPD in case the BIOS didn't do so at boot up
> 
> Longer term full EAPD control as we do with the cs46xx is on my list,
> paticularly as i8xx laptops are becoming common . (EAPD is the amplifier
> power controller)
> 
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
-- 
Juergen Sawinski
Max-Planck-Institute for Medical Research
Dept. of Biomedical Optics
Jahnstr. 29
D-69120 Heidelberg
Germany

Phone:  +49-6221-486-309
Fax:    +49-6221-486-325

priv.
Phone:  +49-6221-418 848
Mobile: +49-171-532 5302

Re: i810 sound broken...

[Alan Cox]

On Mon, 2002-08-05 at 21:21, Juergen Sawinski wrote:
> On my Intel D845GBV board (obviously ICH4) none of 2.4 nor alsa works.
> It's a production box, so I hestitate to try 2.5.

2.5 is older audio code than 2.4.19-ac

If your audio isnt working then a good starting point is to grab the
2.4.19-ac1 i810_audio (you can drop those files into 2.4.19 vanilla
fine)

1.	Does the mixer work, can you play a CD, control the volume etc ?

If so that means we have an active codec and the AC97 bus is running

2.	Do you get regular interrupts doing "yes oink >/dev/audio"

This is a good clue to whether the bus master engine is running. If it
is we should be getting regular interrupts (and if the audio works a
nasty squeak)

3.	Does the audio speed test report about 48Khz (expected except on some
Dell laptops)

Re: i810 sound broken...

[Andris Pavenis]

i810_audio works for me with 2.4.19-ac3 without problems (kernel was built
with gcc-3.1). Also no problems with loading i810 modules. I still had trouble
with modules before I upgraded modutils from 2.4.16 to 2.4.19

Only had to build lm_sensors with old gcc-2.95.3 otherwise their modules
load about 2 minutes (but still works after that)

Andris

bash-2.05a# uname -a
Linux hal 2.4.19-ac3 #2 Mon Aug 5 11:17:44 EEST 2002 i686 unknown
bash-2.05a# dmesg | sed 1q
Linux version 2.4.19-ac3 (root@hal) (gcc version 3.1) #2 Mon Aug 5 11:17:44 EEST 2002
bash-2.05a# lsmod
Module                  Size  Used by    Not tainted
w83781d                19224   0  (unused)
i2c-i801                4340   0  (unused)
i2c-i810                2348   0  (unused)
i810_audio             22600   1
ac97_codec             10920   0  [i810_audio]
nls_iso8859-1           2844   2  (autoclean)
nls_cp437               4348   2  (autoclean)
bash-2.05a# lspci -v
00:00.0 Host bridge: Intel Corp. 82810 GMCH [Graphics Memory Controller Hub] (rev 03)
        Subsystem: Asustek Computer, Inc.: Unknown device 801f
        Flags: bus master, fast devsel, latency 0

00:01.0 VGA compatible controller: Intel Corp. 82810 CGC [Chipset Graphics Controller] (rev 03) (prog-if 00 [VGA])
        Subsystem: Asustek Computer, Inc.: Unknown device 801f
        Flags: bus master, 66Mhz, medium devsel, latency 0, IRQ 11
        Memory at e4000000 (32-bit, prefetchable) [size=64M]
        Memory at e3800000 (32-bit, non-prefetchable) [size=512K]
        Capabilities: [dc] Power Management version 1

00:1e.0 PCI bridge: Intel Corp. 82801AA PCI Bridge (rev 02) (prog-if 00 [Normal decode])
        Flags: bus master, fast devsel, latency 0
        Bus: primary=00, secondary=01, subordinate=01, sec-latency=32
        I/O behind bridge: 0000d000-0000dfff
        Memory behind bridge: e3000000-e37fffff

00:1f.0 ISA bridge: Intel Corp. 82801AA ISA Bridge (LPC) (rev 02)
        Flags: bus master, medium devsel, latency 0

00:1f.1 IDE interface: Intel Corp. 82801AA IDE (rev 02) (prog-if 80 [Master])
        Subsystem: Intel Corp. 82801AA IDE
        Flags: bus master, medium devsel, latency 0
        [virtual] I/O ports at 01f0
        [virtual] I/O ports at 03f4
        [virtual] I/O ports at 0170
        [virtual] I/O ports at 0374
        I/O ports at b800 [size=16]

00:1f.2 USB Controller: Intel Corp. 82801AA USB (rev 02) (prog-if 00 [UHCI])
        Subsystem: Intel Corp. 82801AA USB
        Flags: bus master, medium devsel, latency 0, IRQ 9
        I/O ports at b400 [size=32]

00:1f.3 SMBus: Intel Corp. 82801AA SMBus (rev 02)
        Subsystem: Intel Corp. 82801AA SMBus
        Flags: medium devsel, IRQ 5
        I/O ports at e800 [size=16]

00:1f.5 Multimedia audio controller: Intel Corp. 82801AA AC'97 Audio (rev 02)
        Subsystem: Analog Devices: Unknown device 1043
        Flags: bus master, medium devsel, latency 0, IRQ 5
        I/O ports at e000 [size=256]
        I/O ports at e100 [size=64]

01:0a.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C (rev 10)
        Subsystem: Realtek Semiconductor Co., Ltd. RT8139
        Flags: bus master, medium devsel, latency 64, IRQ 9
        I/O ports at d800 [size=256]
        Memory at e3000000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [50] Power Management version 2

Re: i810 sound broken...

[Thomas Munck Steenholdt]

> On Mon, Aug 05, 2002 at 08:38:52PM +0200, Thomas Munck Steenholdt wrote:
> > On Mon, 2002-08-05 at 17:28, Alan Cox wrote:
> > > On Mon, 2002-08-05 at 14:47, venom@sns.it wrote:
> > > > Still OSS modules for i810 does not work with 2.5 kernels, actually 2.4
> > > > is fine. No time to switch to alsa (and not interested for now too). 
> > > 
> > > OSS for 2.5 is someone elses problem. I have no plan to do any work on
> > > the old OSS drivers for the 2.5 tree or even to submit 2.4 updates into
> > > 2.5 for it. 
> > > 
> > 
> > So anyway - How should I go about determining the exact problem on my
> > box... I've had it all along, and I know for a fact that the hardware is
> > OK... Modules are loaded correctly, but it just does not work!
> 
> I'll tell you what you can do.  Grab some ICH docs so you have a list of 
> the valid regs on the i810 sound chip.  Then, go into i810_audio.c and 
> write me up a little hack that, at the end of the chip init sequence, 
> whill dump the state of all the regs on the chip.  Make it smart enough to 
> know about different regs on different chips (aka, Intel ICH0 and ICH1 
> will probably have a slightly different reg setup than the ICH2 and 
> later).  Then, load that driver on your machine and get me that register 
> dump.  Then, I'll take the patch and apply it here on the i810 machines I 
> have that do work and get their register dump.  We'll see then where the 
> differences are.  On the i845 based machine I have at work, where the 
> sound doesn't work just like you describe, I've isolated the problem down 
> to the fact that when we start the DMA engine it *immediately* signals 
> that it has already finished the DMA process and has already stopped again 
> but it never actually does the DMA.  So, I suspect there is some config 
> bit somewhere set wrong and the DMA is not taking place as a result (hell, 
> for all I know, the AC97 link for sound output may be off or something 
> like that).  Getting a register dump from several busted machines as well 
> as from some working machines should enable me to solve the problem 
> relatively easily.  I just haven't had the time to write the patch myself 
> and do any more work on the thing :-(

Please excuse me for not immediately responding with a working hack for this.
I'm sorry to say that I have not yet had any experience in kernel programming
and even though I jumped on the "job" as soon as I saw you mail, I quickly
realized that I probably need some time of practicing, figuring out how stuff
is done, and get into the actual close-to-hardware programming that is
required for stuff like this... 

Instead of promising to have a hack ready at any time... I'll follow this
case closely and see what I can learn from it. I need to get
into how stuff is done in this kind of area.
Hopefully some day you'll see meactually post a patch of some
kind... ;-)

Back to the case... I realized that I might not have explained myself
correctly regarding my hardware...
My machine is i845 based, using the i810 driver for audio...
it is not i810 based!

Thomas


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