Date: Mon, 20 Apr 2009 16:27:52 +0200 From: Frederique Rijsdijk <frederique@isafeelin.org> To: FreeBSD-Questions <freebsd-questions@freebsd.org> Subject: serial console, COM port not working -> [FILTER] ? Message-ID: <49EC8668.5060303@isafeelin.org>
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I'm setting up serial console access to our machines.
One of them isn't giving a login prompt, and I noticed a difference in
dmesg output:
> sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
> sio0: type 16550A
> sio0: [FILTER]
The last line I don't see on boxes where all is fine. My C reading isn't
that good, but I've found in /usr/src/sys/kern/subr_bus.c:
> bus_setup_intr(device_t dev, struct resource *r, int flags,
> driver_filter_t filter, driver_intr_t handler, void *arg, void **cookiep)
> {
> int error;
>
> if (dev->parent != NULL) {
> error = BUS_SETUP_INTR(dev->parent, dev, r, flags,
> filter, handler, arg, cookiep);
> if (error == 0) {
> if (handler != NULL && !(flags & INTR_MPSAFE))
> device_printf(dev, "[GIANT-LOCKED]\n");
> if (bootverbose && (flags & INTR_MPSAFE))
> device_printf(dev, "[MPSAFE]\n");
> if (filter != NULL) {
> if (handler == NULL)
> device_printf(dev, "[FILTER]\n");
> else
> device_printf(dev, "[FILTER+ITHREAD]\n");
> } else
> device_printf(dev, "[ITHREAD]\n");
> }
> } else
> error = EINVAL;
> return (error);
> }
But what does it mean?
Thanks,
-- Frederique
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