2.5.69: Tyans S2460 hang with i2c

2.5.69: Tyans S2460 hang with i2c

[Dr. David Alan Gilbert]

Kernel: 2.5.69
Motherboard: Tyan S2460 (Dual Athlon 760MP chipset)

It works fine without i2c, with i2c we hang directly after:

i2c /dev entries module version 2.7.0 (20021208)
registering 0-0048

Other than that it seems a happy kernel,

Dave
 ---------------- Have a happy GNU millennium! ----------------------   
/ Dr. David Alan Gilbert    | Running GNU/Linux on Alpha,68K| Happy  \ 
\ gro.gilbert @ treblig.org | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/

Re: 2.5.69: Tyans S2460 hang with i2c

[Greg KH]

On Mon, May 05, 2003 at 12:42:46PM +0100, Dr. David Alan Gilbert wrote:
> Kernel: 2.5.69
> Motherboard: Tyan S2460 (Dual Athlon 760MP chipset)
> 
> It works fine without i2c, with i2c we hang directly after:
> 
> i2c /dev entries module version 2.7.0 (20021208)
> registering 0-0048

What i2c drivers are you trying to load?  Are you sure you have the
hardware for them?  Some of the i2c sensor drivers can hang your box if
you load them and you don't have the hardware for them.

And has these i2c drivers ever worked for you before on an older version
of 2.5?

thanks,

greg k-h

Re: 2.5.69: Tyans S2460 hang with i2c

[Dr. David Alan Gilbert]

* Greg KH (greg@kroah.com) wrote:
> On Mon, May 05, 2003 at 12:42:46PM +0100, Dr. David Alan Gilbert wrote:
> > Kernel: 2.5.69
> > Motherboard: Tyan S2460 (Dual Athlon 760MP chipset)
> > 
> > It works fine without i2c, with i2c we hang directly after:
> > 
> > i2c /dev entries module version 2.7.0 (20021208)
> > registering 0-0048
> 
> What i2c drivers are you trying to load?  Are you sure you have the
> hardware for them?  Some of the i2c sensor drivers can hang your box if
> you load them and you don't have the hardware for them.

Looking back at the objects that were built they are:

./busses/i2c-amd756.o
./chips/adm1021.o
./chips/lm75.o

I guess its a bad thing if they hang if the hardware isn't present - I'd
presumed it was possible to build them all and they'd just use which
ever are actually present. (How do I know which I've got?)

> And has these i2c drivers ever worked for you before on an older version
> of 2.5?

Hmm - its a while since I last tried it I think; I'm reasonably sure
I've had some working in the past).

Dave

 ---------------- Have a happy GNU millennium! ----------------------   
/ Dr. David Alan Gilbert    | Running GNU/Linux on Alpha,68K| Happy  \ 
\ gro.gilbert @ treblig.org | MIPS,x86,ARM,SPARC,PPC & HPPA | In Hex /
 \ _________________________|_____ http://www.treblig.org   |_______/

Re: 2.5.69: Tyans S2460 hang with i2c

[Greg KH]

On Mon, May 05, 2003 at 07:18:31PM +0100, Dr. David Alan Gilbert wrote:
> * Greg KH (greg@kroah.com) wrote:
> > On Mon, May 05, 2003 at 12:42:46PM +0100, Dr. David Alan Gilbert wrote:
> > > Kernel: 2.5.69
> > > Motherboard: Tyan S2460 (Dual Athlon 760MP chipset)
> > > 
> > > It works fine without i2c, with i2c we hang directly after:
> > > 
> > > i2c /dev entries module version 2.7.0 (20021208)
> > > registering 0-0048
> > 
> > What i2c drivers are you trying to load?  Are you sure you have the
> > hardware for them?  Some of the i2c sensor drivers can hang your box if
> > you load them and you don't have the hardware for them.
> 
> Looking back at the objects that were built they are:
> 
> ./busses/i2c-amd756.o
> ./chips/adm1021.o
> ./chips/lm75.o
> 
> I guess its a bad thing if they hang if the hardware isn't present - I'd
> presumed it was possible to build them all and they'd just use which
> ever are actually present. (How do I know which I've got?)

I'd recommend running 2.4 and getting the latest i2c and lmsensors code
from the lmsensors web site.  Then run the sensors-detect script which
will try to safely determine what kind of hardware you have, and what
drivers you need.

If after doing that, it says you have the adm1021 and lm75 chips and
they work properly on 2.4, please let me know and I'll try to track down
what's changed on 2.5.

Hope this helps,

greg k-h

Re: 2.5.69: Tyans S2460 hang with i2c

[Heinz Ulrich Stille]

On Monday 05 May 2003 20:28, Greg KH wrote:
> If after doing that, it says you have the adm1021 and lm75 chips and
> they work properly on 2.4, please let me know and I'll try to track down
> what's changed on 2.5.

The Tiger MP and MPX need (apart from i2c-dev) w83781d and i2c-amd756.
I'm using kernel 2.4.20 with the lm_sensors modules; the w83781d needs
a special patch (to recognize two subclients, iirc). The proper init
sequence is:
modprobe i2c-dev
modprobe w83781d init=0 force_subclients=0,0x2c,0x4a,0x4b \
	motherboard=tyan_s246x
modprobe i2c-amd756

Up till now I've had no luck with kernel 2.5.x, not that I've really tried.
Among other problems, I didn't get lm_sensors to compile. This may be fixed
by now, but I'm happy with 2.4.20 and haven't got too much time.

MfG, Ulrich

-- 
Heinz Ulrich Stille / Tel.: +49-541-9400463 / Fax: +49-541-9400450
design_d gmbh / Lortzingstr. 2 / 49074 Osnabrück / www.design-d.de