Re: More on the VIA KT133 chipset misbehaving in Linux

From: Rogerio Brito (
Date: Fri Feb 02 2001 - 09:55:35 EST

On Jan 29 2001, Dylan Griffiths wrote:
> The VIA KT133 chipset exhibits the following bugs under Linux 2.2.17 and
> 2.4.0:
> 1) PS/2 mouse cursor randomly jumps to upper right hand corner of screen and
> locks for a bit
> 2) Detects a maximum of 64mb of ram, unless worked around by the "mem="
> switch
> 3) The clock drifts slowly (more so under heavy load than light load),
> leaking time.

        I know that I am late here, but I'm also using a via KT133
        chipset with a Duron 600MHz and I'm using a kernel 2.2.18 here
        with the IDE patches and I'm not seeing anything of the above
        problems. Everything just works fine.

        What are you using? I'm using an Asus A7V, with BIOS 1003 (I
        didn't upgrade it, since I'm terribly scarred of it going
        wrong and not being to boot again).

        This is with kernel 2.2.18 (no signs of filesystem corruption
        also, and I have UDMA/66 enabled, but my system is not exactly

> I think #2 is because e820h memory detection

        While I don't have problems with the Duron above, I do have a
        486 here with 8MB of memory that I intend to use as a router
        for my local LAN, but 2.4.0 only recognizes 7MB, while 2.2.18
        recognizes all 8MB. Under 2.4.0 (I haven't tried 2.4.1 yet), I
        used a mem=8M option and it worked fine, but I don't know if
        this is indeed safe or not (I'd guess that it would be, since
        the 2.2 kernels use all memory, but you never know).

        []s, Roger...

  Rogerio Brito - -
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