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From: Thomas Hofer <th@monochrom.at>
To: linux-kernel@vger.kernel.org
Subject: Re: Box freezes if I enable "AMD 76x native power management"
Date: Sat, 22 Feb 2003 23:21:27 +0100
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On Saturday 22 February 2003 19:53, John W. M. Stevens wrote:
> On Sat, Feb 22, 2003 at 04:30:57PM +0300, Oleg Drokin wrote:
> >    Starting from 2.4.20 until now (including 2.4.21-pre4 and
> > 2.4.21-pre4-ac5", whenever I enable "AMD 76x native power
> > management" in my kernel config, I get kernel that hangs at boot
> > after reporting elevator stuff about my IDE drives. Is anybody
> > interested?
> [..]
> 1) Exact Mother board (Tyan what?  Tiger MPX 2466N . . . ?)
> 2) Do you have DMA turned on for your IDE drives?
> 3) Are you enabling the AMD chip support for IDE?
>
> . . . and anything else you can find out about the box?
>
> Most importantly . . . does the problem go away if you turn off DMA
> support for IDE?

I have some problems with this hardware, too. Maybe I can provide some 
useful bugreports - I'd gladly do some tests with the 2.4.x kernels if 
someone is interested (I only tried 2.4.19 and 2.4.20 with this 
hardware so far).

I have a Tyan S2466N-4M (Tiger MPX, Chipset AMD 760MPX, 762, 768), 
2x Athlon MP 2000+, 
512MB Reg. ECC SDRAM
2-3 IDE drives and a DVD-ROM on the onboard channels
DMA support enabled (I don't like to disable this, because when I copy 
over 100MB from the DVD to a harddrive with DMA disabled the cpu-usage 
wents well above 50% and then the machine _freezes_.)

With 2.4.19, the power-switch didn't work after shutdown (It works now 
with 2.4.20). Automatic power-off (halt -p) doesn't work with neighter 
2.4.19 nor 2.4.20. 

With "AMD 76x native power management" I experienced freezes under X11 
when the system was idle for about 30 min that usually went away when I 
typed on the keyboard. Using the (USB) mouse had no effect. But I had 
no problems at boot-time.

Thomas.


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