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    SubjectRe: Box freezes if I enable "AMD 76x native power management"
    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.


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