isapnp & module autoload (udev?)

isapnp & module autoload (udev?)

[Meelis Roos]

Hi,

I tested 2.6.23-rc3 along with Debian unstable on a older pentium2-era 
PC that has a ISA bus sound card that isapnp finds. snd-sb finds it too 
using isapnp. However, there seems to be no module autoloading 
happening.

So, the question is: should isapnp moudle autoloading work with current 
kernel + current udev?

-- 
Meelis Roos (mroos@linux.ee)

Re: isapnp & module autoload (udev?)

[Marco d'Itri]

On Aug 24, Meelis Roos <mroos@linux.ee> wrote:

> I tested 2.6.23-rc3 along with Debian unstable on a older pentium2-era 
> PC that has a ISA bus sound card that isapnp finds. snd-sb finds it too 
> using isapnp. However, there seems to be no module autoloading 
> happening.
> 
> So, the question is: should isapnp moudle autoloading work with current 
> kernel + current udev?
Only for some devices, others do not provide in sysfs everything needed
to build the MODALIAS string.

-- 
ciao,
Marco

Re: isapnp & module autoload (udev?)

[Kay Sievers]

On 8/24/07, Meelis Roos <mroos@linux.ee> wrote:
> I tested 2.6.23-rc3 along with Debian unstable on a older pentium2-era
> PC that has a ISA bus sound card that isapnp finds. snd-sb finds it too
> using isapnp. However, there seems to be no module autoloading
> happening.
>
> So, the question is: should isapnp moudle autoloading work with current
> kernel + current udev?

Not out-of-the-box, I guess. There are likely no aliases in the kernel
modules which match the hardware for these old drivers. You could put
them in a modprobe config file maybe.

What's in the module? What does:
  /sbin/modinfo <kernel module name> | grep alias
print?

And what does the hardware say? What does:
  grep . /sys/bus/pnp/devices/*/id
print?

Kay

Re: isapnp & module autoload (udev?)

[Meelis Roos]

> What's in the module? What does:
>   /sbin/modinfo <kernel module name> | grep alias
> print?

filename:       /lib/modules/2.6.23-rc3/kernel/sound/isa/sb/snd-sb16.ko
description:    Sound Blaster 16
license:        GPL
author:         Jaroslav Kysela <perex@suse.cz>
alias:          pnp:ctBA03b0dPNPb003*
alias:          pnp:cCTL00f0dCTL0043*
alias:          pnp:cCTL0086dCTL0041*
alias:          pnp:cCTL0080dCTL0041*
alias:          pnp:cCTL0070dCTL0001*
alias:          pnp:cCTL0051dCTL0001*
alias:          pnp:cCTL002cdCTL0031*
alias:          pnp:cCTL002bdCTL0031*
alias:          pnp:cCTL002adCTL0031*
alias:          pnp:cCTL0029dCTL0031*
alias:          pnp:cCTL0028dCTL0031*
alias:          pnp:cCTL0027dCTL0031*
alias:          pnp:cCTL0026dCTL0031*
alias:          pnp:cCTL0025dCTL0031*
alias:          pnp:cCTL0024dCTL0031*
depends:        snd-sb-common,snd-opl3-lib,snd-mpu401-uart,snd-sb16-dsp,snd-pcm,snd,snd-sb16-csp
vermagic:       2.6.23-rc3 SMP mod_unload PENTIUMII 4KSTACKS
parm:           index:Index value for SoundBlaster 16 soundcard. (array of int)
parm:           id:ID string for SoundBlaster 16 soundcard. (array of charp)
parm:           enable:Enable SoundBlaster 16 soundcard. (array of bool)
parm:           isapnp:PnP detection for specified soundcard. (array of bool)
parm:           port:Port # for SB16 driver. (array of long)
parm:           mpu_port:MPU-401 port # for SB16 driver. (array of long)
parm:           fm_port:FM port # for SB16 PnP driver. (array of long)
parm:           irq:IRQ # for SB16 driver. (array of int)
parm:           dma8:8-bit DMA # for SB16 driver. (array of int)
parm:           dma16:16-bit DMA # for SB16 driver. (array of int)
parm:           mic_agc:Mic Auto-Gain-Control switch. (array of int)
parm:           csp:ASP/CSP chip support. (array of int)

 
> And what does the hardware say? What does:
>   grep . /sys/bus/pnp/devices/*/id
> print?

/sys/bus/pnp/devices/00:00/id:PNP0c01
/sys/bus/pnp/devices/00:01/id:PNP0000
/sys/bus/pnp/devices/00:02/id:PNP0200
/sys/bus/pnp/devices/00:03/id:PNP0100
/sys/bus/pnp/devices/00:04/id:PNP0b00
/sys/bus/pnp/devices/00:05/id:PNP0303
/sys/bus/pnp/devices/00:06/id:PNP0800
/sys/bus/pnp/devices/00:07/id:PNP0c04
/sys/bus/pnp/devices/00:08/id:PNP0c02
/sys/bus/pnp/devices/00:09/id:PNP0c02
/sys/bus/pnp/devices/00:0a/id:PNP0501
/sys/bus/pnp/devices/00:0b/id:PNP0501
/sys/bus/pnp/devices/00:0c/id:PNP0401
/sys/bus/pnp/devices/00:0d/id:PNP0700
/sys/bus/pnp/devices/00:0e/id:PNP0a03
/sys/bus/pnp/devices/01:01.00/id:CTL0001
/sys/bus/pnp/devices/01:01.01/id:CTL7001
/sys/bus/pnp/devices/01:01.01/id:PNPb02f

CTL0001 seems to be present in both but it occurs with CTL0070 or 
CTL0051.

-- 
Meelis Roos (mroos@linux.ee)

Re: isapnp & module autoload (udev?)

[Kay Sievers]

On 8/24/07, Meelis Roos <mroos@linux.ee> wrote:
> > What's in the module? What does:
> >   /sbin/modinfo <kernel module name> | grep alias
> > print?
>
> filename:       /lib/modules/2.6.23-rc3/kernel/sound/isa/sb/snd-sb16.ko
> description:    Sound Blaster 16
...
> alias:          pnp:cCTL0070dCTL0001*
> alias:          pnp:cCTL0051dCTL0001*
...
> > And what does the hardware say? What does:
> >   grep . /sys/bus/pnp/devices/*/id
> > print?
...
> /sys/bus/pnp/devices/01:01.00/id:CTL0001
...
> CTL0001 seems to be present in both but it occurs with CTL0070 or
> CTL0051.

Right, that will not match. You could add:
  alias pnp:dCTL0001 snd-sb16
to:
  /etc/modprobe.d/pnp
or some other file in that directory.

We may switch to acpi based module autoloading in the future and add
"acpi:*" aliases to the modules intsead of the broken pnp alias hack.
Just to check if that would work, can you please provide the output
of:
  grep . /sys/bus/acpi/devices/*/modalias

Thanks,
Kay