Kanwar Ranbir Sandhu wrote:
Hi,I tried to use ttyS0 in dom0 for a serial interface UPS, but apcupsd complains that it can't talk to ttyS0. I look through /var/log/messages, and sure enough, xen is using it: Jul 3 09:45:22 xenmaster kernel: Xen virtual console successfully installed as ttyS0 Can that be turned off, so that ttyS0 isn't used by Xen? I tried to do this several months ago, but back then I was told Fedora was working towards fixing the serial port access problems.
Try the suggestions here: http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/In particular try booting with xencons=off (on the kernel command line, not the Xen hypervisor command line).
Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903
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