Messages in this thread | | | Date | Sat, 26 Mar 2005 07:55:49 -0800 | From | Phil Oester <> | Subject | Re: Garbage on serial console after serial driver loads |
| |
On Sat, Mar 26, 2005 at 03:10:05PM +0000, Russell King wrote: > Doesn't matter. The problem is that dwmw2's NS16550A patch (from ages > ago) changes the prescaler setting for this device so we can use the > higher speed baud rates. This means any programmed divisor (programmed > at early serial console initialisation time) suddenly becomes wrong as > soon as we fiddle with the prescaler during normal UART initialisation > time.
FWIW, I see the same thing here on some Dell Poweredge boxes:
serio: i8042 AUX port at 0x60,0x64 irq 12 serio: i8042 KBD port at 0x60,0x64 irq 1 Serial: 8250/16550 driver $Revision: 1.90 $ 8 ports, IRQ sharing disabled ttyS0 at I/O 0x3f8 (irq = 4) is a NS16550A ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A <garbage>
But intererstingly, on identical boxes, the garbage only appears on those hooked up to a PortMaster device - those using a Cyclades never display this problem. (???)
Phil - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |