I've been succesfully using NM256-soundmodule on my Dell Latitute
CPtC400 until I upgraded from kernel 2.4.12-ac5 to 2.4.13-ac3. Now the
system hangs at boot - or to be more precise, right after boot when
modutils try to load nm256_audio.o as instructed in /etc/modules.
Lockup is complete, even power-button doesn't work so I have to remove
battery and power-cord to get the machine shut down. I have
APM-support compiled in, no ACPI.
NM256 is PCI-based, so I checked whether CONFIG_HOTPLUG_PCI would have
any effect. It didn't.
Exactly the same thing happens with 2.4.13-ac4.
If I compile the kernel without sound-support, everything works just
fine.
Has anyone had similar problems? What additional info should I
produce?
Suonp??...
Samuli Suonpaa wrote:
>
> I've been succesfully using NM256-soundmodule on my Dell Latitute
> CPtC400 until I upgraded from kernel 2.4.12-ac5 to 2.4.13-ac3. Now the
> system hangs at boot - or to be more precise, right after boot when
> modutils try to load nm256_audio.o as instructed in /etc/modules.
> Lockup is complete, even power-button doesn't work so I have to remove
> battery and power-cord to get the machine shut down. I have
> APM-support compiled in, no ACPI.
Does backing out this patch fix things?
ftp://ftp.kernel.org/pub/linux/kernel/people/jgarzik/patches/2.4.13/nm256-ac97-update-2.4.13.ac1.patch.gz
--
Jeff Garzik | Only so many songs can be sung
Building 1024 | with two lips, two lungs, and one tongue.
MandrakeSoft | - nomeansno
> CPtC400 until I upgraded from kernel 2.4.12-ac5 to 2.4.13-ac3. Now the
> system hangs at boot - or to be more precise, right after boot when
> modutils try to load nm256_audio.o as instructed in /etc/modules.
> Lockup is complete, even power-button doesn't work so I have to remove
> battery and power-cord to get the machine shut down. I have
> APM-support compiled in, no ACPI.
Ok.
> NM256 is PCI-based, so I checked whether CONFIG_HOTPLUG_PCI would have
> any effect. It didn't.
>
> Exactly the same thing happens with 2.4.13-ac4.
>
> If I compile the kernel without sound-support, everything works just
> fine.
Jeff Garzik updated the neomagic driver to use the generic ac97 codec. It
looks like he didnt quite get it right firs ttime around. I'll take a look
and its then a case of either fixing it or reverting Jeff's change
Alan Cox wrote:
> > NM256 is PCI-based, so I checked whether CONFIG_HOTPLUG_PCI would have
> > any effect. It didn't.
> >
> > Exactly the same thing happens with 2.4.13-ac4.
> >
> > If I compile the kernel without sound-support, everything works just
> > fine.
>
> Jeff Garzik updated the neomagic driver to use the generic ac97 codec. It
> looks like he didnt quite get it right firs ttime around. I'll take a look
> and its then a case of either fixing it or reverting Jeff's change
If you don't see something right off, go ahead and revert it.
IIRC now, nm256 had trouble with completely locking the PCI bus if you
touched the wrong AC97 registers. The solution was to create
ac97_codec_{read,write} that filtered register numbers depending on a
codec-specific mask, thus avoiding those registers on nm256 and using
them on other chips. This change isn't in anybody's ac97_codec (except
an old CVS of mine), and it was never fully debugged when I had a hands
on a laptop with [supposed] ac97 codec nm256 on it.
So, I am hoping it's a stupid error like "using ac97 mixer when I
shouldn't", otherwise it's likely too much trouble to bother with.
--
Jeff Garzik | Only so many songs can be sung
Building 1024 | with two lips, two lungs, and one tongue.
MandrakeSoft | - nomeansno
> IIRC now, nm256 had trouble with completely locking the PCI bus if you
> touched the wrong AC97 registers. The solution was to create
> ac97_codec_{read,write} that filtered register numbers depending on a
Certainly some setups (the Dell ones notably) you couldnt play with the
codec except in strictly controlled manners. I thought those were just the
non ac97 weird dell ones tho
Alan
Jeff Garzik <[email protected]> wrote:
> Does backing out this patch fix things?
>
> ftp://ftp.kernel.org/pub/linux/kernel/people/jgarzik/patches/2.4.13/nm256-ac97-update-2.4.13.ac1.patch.gz
Yes it did, thanks.
Unfortunately I do not have the skills to debug your patch but should
you have anything you'd like me to test, I'll be more than happy to do
it.
Suonp??...