Really poor performance on /dev/ttyv* only

[M. Warner Losh]

In message: <20051101073157.GE18710 at wantadilla.lemis.com>
            "Greg 'groggy' Lehey" <grog at freebsd.org> writes:
: On Tuesday,  1 November 2005 at 18:11:08 +1100, Antony Mawer wrote:
: > On 1/11/2005 6:02 PM, Greg 'groggy' Lehey wrote:
: >> I've just installed -CURRENT on a Dell Inspiron 6000, and I discover
: >> that the keyboard response on virtual terminals (/dev/ttyv*) is very
: >> slow.  If I keyboard repeat, the echo to the terminal is jerky, about
: >> 3 or 4 characters at a time with a marked delay in between.  Under X
: >> or over the network there's no problem.  Has anybody else seen this?
: >> The kernel isn't 100% GENERIC (I've disabled WITNESS and
: >> WITNESS_SKIPSPIN, for example), but I can't see anything that would
: >> explain this behaviour.
: >
: > I've seen this on two FreeBSD 4.7 systems connected via a KVM (sharing
: > with two Windows 2003 servers)... typing at the console of them was
: > almost like typing via ssh on a satellite connection. Connecting via ssh
: > was fine, it was only locally that it was a problem. Resetting the
: > keyboard repeat rate on BSD had no discernible impact.
: 
: I'd guess that this is a different situation.  FWIW, the Inspiron
: series are laptops, and this is at the keyboard.  The machine is brand
: new, and I've never had another version of FreeBSD on it, but I
: suspect it's -CURRENT rather than the laptop.

I don't see it on my current laptop.  It must at least be a
combination.  Maybe you could track down what the problem is?

Warner