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SubjectRe: Possible critical VIA vt82c686a chip bug
On Thu, Oct 26, 2000 at 04:13:51PM +0200, Yoann Vandoorselaere wrote:

> > > > I've found a bug in my VIA SuperSouth (vt82c686a) chip (ISA bridge
> > > > revision 0x12, silicon rev CD) on my FIC VA-503A rev 1.2:
> > > >
> > > > When there is heavy disk activity (several tars running concurrently on
> > > > UDMA66 drive, or tar'ing from one UDMA66 drive to another over two
> > > > channels), the system time, namely gettimeofday() goes crazy - now and
> > > > then it advances the time about 1:20 for a fraction of a second and then
> > > > changes back to normal time.
> > > >
> > > > This causes X to blank the screen when it should not,
> > >
> > > Really strange, I'm getting exactly the same problem on a machine
> > > with the same chipset...
> >
> > Could you send me your 'lspci -vvxxx' to confirm it's the very same
> > chip?
>
> 00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 22)
> Subsystem: VIA Technologies, Inc. VT82C686/A PCI to ISA Bridge
> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping+ SERR- FastB2B-
> Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
> Latency: 0

Oh, this is a newer revision than mine (silicon CF or CG) - I'd expect
that one not to have the problem ... well, it seems it's more widespread
than I expected.

--
Vojtech Pavlik
SuSE Labs
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