Messages in this thread | | | Date | Thu, 26 Oct 2000 16:01:46 +0200 | From | Vojtech Pavlik <> | Subject | Re: Possible critical VIA vt82c686a chip bug |
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On Thu, Oct 26, 2000 at 03:58:21PM +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?
> > Now I'd like to know if I have a faulty chip, faulty motherboard or > > whether this problem exists in more chips as well. > > I've changed my motherboard thinking it was a default of it. > it is not.
Ok, so this means it's not the motherboard and it's not just my chip.
> > If anyone owning a motherboard with the vt82c686a chip (VIA with UDMA66 > > and audio), could test this, I'd appreciate that. > > I've this kind of motherboard without audio.
Well, the audio function is integrated in the chip, possibly just disabled.
> > Attached is a patch that makes the problems go away by reprogramming the > > chip in the problematic case. > > I'll try it ASAP, then do a feedback.
Ok, thanks.
-- Vojtech Pavlik SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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