On Sat, Mar 26, 2005 at 07:55:49AM -0800, Phil Oester wrote: > 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. (???)
Sorry, I don't understand your scenarios. Can you explain the circumstances under which you see corruption? >From the kernel messages you've quoted above, I can only think that you're not using ttyS0 as the serial console - if you were, my understanding of this issue would indicate that you should get the garbage immediately after the line starting "Serial:" Either my understanding of the cause of this problem is wrong, or I'm not understanding your setup. -- Russell King Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/ maintainer of: 2.6 Serial core - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/