Messages in this thread |  | | Subject | Re: Possible critical VIA vt82c686a chip bug | From | Yoann Vandoorselaere <> | Date | 26 Oct 2000 15:58:21 +0200 |
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Vojtech Pavlik <vojtech@suse.cz> writes:
> Hi! > > 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...
This is an athlon 750 machine, with scsi and ide a disk... I've tryed to see where the problem was comming from for age ( the problem is what you describe and it happen after some time (1 to 24 hour, it depend) and often while or after heavy I/O... the only fix is to reboot the machine. )
[...]
> 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.
> 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.
> 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.
-- -- Yoann http://www.mandrakesoft.com/~yoann/ I worry about my child and the Internet all the time, even though she's too young to have logged on yet. Here's what I worry about. I worry that 10 or 15 years from now, she will come to me and say 'Daddy, where were you when they took freedom of the press away from the Internet?' -- Mike Godwin - 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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