console response/interaction requires keypress

["Sarton O'Brien" <bsd-xen%roguewrt.org@localhost>]

Hi all,

I have a strange issue that I have been seeing for a while (probably a 
month or so) but up until now hasn't really been an issue for me.

The symptom is, when connected to a domu via xm console, that a keypress 
of any kind is required to display console output.

Ie. when connecting via xm console, the login prompt is not displayed 
until I hit enter, then when I begin to type 'root', 'r' is only 
displayed after I type 'o' etc. When I go to hit enter after typing 
root, 'roo' is only displayed until the enter key is pressed.

Having ssh available on all existing domus has allowed me to circumvent 
this issue but in the last week, attempting to bootstrap linux domus has 
been tortuous. I've also noticed that linux domus won't boot without 
intervention (I'm required to connect multiple times via xm console to 
coerce it into completely booting, after which, dmesg and boot log look 
normal).

Xen3-i386 is completely up-to-date as of yesterday, kernel and userland. 
The linux domu kernel is taken from the xentools distfile.

I'll note that this isn't always a problem with a NetBSD domu, but it 
usually occurs after a few console dettaches.

Another thing I've noticed is that I can completely paste a line of text 
to the console with not character from the entire line being displayed 
until a keypress is received.

Both linux domus that I have tried exhibit the same behaviour, debian 
'etch' and archlinux 'core dump'.

This is probably pr worthy but I'm not quite sure how or where this is 
occuring.

Any help appreciated.

Sarton