From owner-freebsd-questions@FreeBSD.ORG Wed Oct 1 14:46:33 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E3C21106568B for ; Wed, 1 Oct 2008 14:46:33 +0000 (UTC) (envelope-from jmc-freebsd2@milibyte.co.uk) Received: from fhw-relay07.plus.net (fhw-relay07.plus.net [212.159.14.148]) by mx1.freebsd.org (Postfix) with ESMTP id 9D3B78FC14 for ; Wed, 1 Oct 2008 14:46:33 +0000 (UTC) (envelope-from jmc-freebsd2@milibyte.co.uk) Received: from [84.92.153.232] (helo=kestrel.milibyte.co.uk) by fhw-relay07.plus.net with esmtp (Exim) id 1Kl2yF-0001ry-7H for freebsd-questions@freebsd.org; Wed, 01 Oct 2008 15:46:31 +0100 Received: by kestrel.milibyte.co.uk with local (Exim 4.69) (envelope-from ) id 1Kl2yE-0000n5-30 for freebsd-questions@freebsd.org; Wed, 01 Oct 2008 15:46:30 +0100 From: Mike Clarke To: freebsd-questions@freebsd.org Date: Wed, 1 Oct 2008 15:46:29 +0100 User-Agent: KMail/1.9.7 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200810011546.29798.jmc-freebsd2@milibyte.co.uk> X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: jmc-freebsd2@milibyte.co.uk X-SA-Exim-Scanned: No (on kestrel.milibyte.co.uk); SAEximRunCond expanded to false X-Plusnet-Relay: 1f6b86caf55b2d4b44e779ec12fcedd1 Subject: Canon Pixma iP4500 - problem with colours X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Oct 2008 14:46:34 -0000 I've just installed a Canon Pixma iP4500 on a 6.3 system using CUPS and gutenprint. Black printing is fine but I've got problems with colours. The colour wheel on the CUPS test page comes out as a psychedelic collection of brightly coloured rings. If I print from gimp then the correct colours appear but they are very dark and "muddy". The colours start to look a bit more reasonable from the gimp if I push the gamma value up to 2. This isn't a physical problem with the printer, I get good results when printing from Windows. Should I be able to get correct colour rendering "out of the box" or do I have to fiddle about with the multitude of output control adjustments available on the CUPS admin panel? Or should I be using something other than CUPS, that's what I've always used so far but I'm happy to try alternatives if necessary. -- Mike Clarke