Messages in this thread | | | Date | Tue, 12 Nov 2002 14:33:06 +0000 | From | Russell King <> | Subject | Re: 2.5.44 serial driver bug with asus pr-dls m/b |
| |
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/
| |