linux-kernel - [Regression in 2.6.25-rcX] CD/DVD writer no longer works

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Date:	Sun, 24 Feb 2008 12:57:00 -0800 (PST)
From:	zkopex <zkopex@...oo.com>
To:	linux-kernel@...r.kernel.org
Subject: [Regression in 2.6.25-rcX] CD/DVD writer no longer works

Hello,

I am using Debian Sid on a Toshiba A100 laptop. My CD/DVD
writer functions very well on 2.6.23.16 and 2.6.24.2.

I tried 2.6.25-rc2-git7, and I was very sad to notice that
when I tried to write a CD, wodim started to output the
following: "Warning: controller returns zero sized CD
capabilities page."

Since I was able to use this CD/DVD writer successfully with
previous versions of Linux, I believe that this is a regression
in 2.6.25-rcX series.

I am willing to try patches and to do pretty much anything
to debug/fix this problem.

Thanks in advance.

Note: I am attaching the output of wodim to this e-mail.

- zkopex

--- output of wodim ---
root@...ian:~# wodim -v dev=/dev/sr0 blank=fast hardy-desktop-i386.iso
wodim: No write mode specified.
wodim: Asuming -tao mode.
wodim: Future versions of wodim may have different drive dependent defaults.
TOC Type: 1 = CD-ROM
scsidev: '/dev/sr0'
devname: '/dev/sr0'
scsibus: -2 target: -2 lun: -2
Linux sg driver version: 3.5.27
Wodim version: 1.1.6
SCSI buffer size: 64512
wodim: Warning: controller returns zero sized CD capabilities page.
wodim: Warning: controller returns wrong page 0 for CD capabilities page (2A).
Device type    : Removable CD-ROM
Version        : 5
Response Format: 2
Capabilities   :
Vendor_info    : 'MATSHITA'
Identification : 'DVD-RAM UJ-841S '
Revision       : '1.60'
Device seems to be: Generic CD-ROM.
wodim: Warning: controller returns zero sized CD capabilities page.
wodim: Warning: controller returns wrong page 0 for CD capabilities page (2A).
wodim: Warning: controller returns zero sized CD capabilities page.
wodim: Warning: controller returns wrong page 0 for CD capabilities page (2A).
wodim: Warning: controller returns zero sized CD capabilities page.
wodim: Warning: controller returns wrong page 0 for CD capabilities page (2A).
wodim: Sorry, no CD/DVD-Recorder or unsupported CD/DVD-Recorder found on this
target.
wodim: Warning: controller returns zero sized CD capabilities page.
wodim: Warning: controller returns wrong page 0 for CD capabilities page (2A).
Using generic SCSI-2       CD-ROM driver (scsi2_cd).
Driver flags   :
Supported modes:
Beginning DMA speed test. Set CDR_NODMATEST environment variable if device
communication breaks or freezes immediately after that.
FIFO size      : 12582912 = 12288 KB
wodim: Drive does not support TAO recording.
wodim: Illegal write mode for this drive.
--- output of wodim ---



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