On Tue, Nov 12, 2002 at 01:49:46PM +0000, Andrew Walrond wrote:
> Further to the hanging serial output; disabling DEBUG_AUTOCONF in 8250.c
> removes this problem.
>
> So the only remaining problem is when remote console=ENABLED, rather
> than post only, in the bios. If this is a problem at all ?
>
> I assume that remote console=enabled redirects the interrupt 0x10
> “video” requests used to write to the screen and sends the characters to
> the serial port instead, rather than just the POST messages. Since the
> 16bit bios is chucked out when the 32bit linux kernel boots, I don't
> understand why this upsets anything?
Well, it looks like the serial port at 0x3f8 gets unmapped by the bios
when you set remote console=ENABLED. The debug output you've sent all
points towards there being no physical port at 0x3f8.
-- Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux http://www.arm.linux.org.uk/personal/aboutme.html- 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/
This archive was generated by hypermail 2b29 : Fri Nov 15 2002 - 22:00:25 EST