From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750696AbXAQVq5 (ORCPT ); Wed, 17 Jan 2007 16:46:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751073AbXAQVq5 (ORCPT ); Wed, 17 Jan 2007 16:46:57 -0500 Received: from mailout05.sul.t-online.com ([194.25.134.82]:52560 "EHLO mailout05.sul.t-online.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750696AbXAQVq5 (ORCPT ); Wed, 17 Jan 2007 16:46:57 -0500 Message-ID: <45AE9934.6040009@t-online.de> Date: Wed, 17 Jan 2007 22:46:28 +0100 From: Harald Dunkel User-Agent: Icedove 1.5.0.9 (X11/20061220) MIME-Version: 1.0 To: Tejun Heo CC: Kernel Mailing List Subject: Re: 2.6.19.1, sata_sil: sata dvd writer doesn't work References: <45841710.9040900@t-online.de> <4587F87C.2050100@gmail.com> <45883299.2050209@t-online.de> <45887CD8.5090100@gmail.com> <458AE5FB.7080607@t-online.de> <4591FE96.1080606@gmail.com> <459346C4.1030802@gmail.com> <45941F1E.2080808@t-online.de> <459A482C.6020809@gmail.com> <45A296BC.8020208@t-online.de> <45AE30A8.70802@gmail.com> In-Reply-To: <45AE30A8.70802@gmail.com> X-Enigmail-Version: 0.94.1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig3999A88528E2F6466F48C34C" X-ID: rXaTjUZFgeqelX5E-wQlzXsFmbADc4wInW9JrzJwMVj1KM2GBvXfkI X-TOI-MSGID: 80f1e399-5b65-48aa-90ec-8ccfe63c0f0e Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig3999A88528E2F6466F48C34C Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi Tejun, Tejun Heo wrote: >=20 > Okay, I just tested a number of dvds on x86-64 and x86. The error > pattern is really interesting. It doesn't matter whether you're on > x86-64 or x86, 2.6.18 or 2.6.20-rc5. The problem occurs when a dvd > which doesn't match dvd's region mask is played. >=20 > MMC command 0xa4 (READ KEY) is the one which always fails. After the > failure, the odd goes into strange state and usually won't respond to > commands. Interestingly, if you pull the power plug or reset the > machine while the READ KEY command is in progress and then reconnect it= , > you can play the DVD after that. I've checked this multiple times and > no, dvdcss key caching isn't the cause, crossed checked it multiple tim= es. >=20 > Once you played a dvd this way, the drive seems to remember the dvd and= > successfully plays it afterwards. I've checked this multiple times > using completely separate OS installation (one x86, the other x86-64). >=20 How comes that there is no such problem if I connect the drive via an USB SATA adapter? > This almost looks like new defense method against CSS-workaround. Can'= t > understand why the drive remembers successfully played dvds tho. >=20 I would have the option to return it (playing no DVDs is surely a defect), but this would be a shame. It was lightning fast on writing, a little bit noisy, though, but I was really glad to get rid of that clumsy parallel cable. Do you think it would be reasonable to send a bug report to Samsung, and see what they say? I would need some documentation about these MMC commands, though. Is this part of some "Red Book" standard, or so? Regards Harri --------------enig3999A88528E2F6466F48C34C Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFFrpk7UTlbRTxpHjcRAvm/AJ0aOM9SR9Hn7byzAtlZDTmMq+htWgCffL0D 48EN5sNRCUb1FAqnST+96YE= =w4+R -----END PGP SIGNATURE----- --------------enig3999A88528E2F6466F48C34C--