Hello all,
Jeronimo Pellegrini wrote:
> Hi.
>
> That's a VIA timer bug. The patch that fixes it was inthe kernel some
> time ago, but was removed because the workaround was being triggered
> when it shouldn't, if I remember correctly.
>
> Here:
>
>
> --- linux-2.4.15-pre3/arch/i386/kernel/time.c Sun Nov 11 21:33:31 2001
> +++ linux-2.4.15-pre3-new/arch/i386/kernel/time.c Mon Nov 12 14:04:20 2001
> @@ -501,6 +501,19 @@
>
> count = inb_p(0x40); /* read the latched count */
> count |= inb(0x40) << 8;
> +
> + /*
> + * When using some via chipsets (as the vt82c686a, for example)
> + * the system timer counter (i8253) should be reprogrammed in
> + * this case, otherwise it may be reset to a wrong value.
> + */
> + if (count > LATCH-1) {
> + outb_p(0x34, 0x43);
> + outb_p(LATCH & 0xff, 0x40);
> + outb(LATCH >> 8, 0x40);
> + count = LATCH - 1;
> + }
> +
> spin_unlock(&i8253_lock);
>
> count = ((LATCH-1) - count) * TICK_SIZE;
>
I tested this patch with 2.4.17rc[1|2] - and I couldn't find any
problem. The systemtime has always been correct.
Could you please apply this patch to the next kernelversion, maybe
spezifically for the VIA - chipset or with some other needed changes as
Jeronimo wrote?
Thanks,
Andreas Hartmann
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This archive was generated by hypermail 2b29 : Sun Dec 23 2001 - 21:00:24 EST