From help-request at octave dot org Sun Feb 26 06:45:55 2006
Subject: Re: a\b operation slow
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: "Hartmut Behrens" <hartmut dot behrens at gmail dot com>
Cc: help at octave dot org, David.Bateman@motorola.com
Date: Sun, 26 Feb 2006 07:45:26 -0500

On 26-Feb-2006, Hartmut Behrens wrote:

| Sorry i meant a\b'.

On modern hardware, this operation should take just a fraction of a
second, even for matrices considerably larger than the one you have.

| I am using Octave 2.1.72 on Fedora Core 3, installed
| from source.
| Could it be that the FPU is disabled by the kernel ? (i am not very familiar
| with kernel operation) - i will recompile it to see if there is an option to
| enable/disable FPU support.

My guess is you have a broken Lapack library installed on your
system.  See for example

  https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=138447

jwe



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