Comment 8 for bug 304954

Hi,

My bad all, it was the libdvdecss issue - one would have thought that
the software could detect the lack of libdvdcss or equivalent, however
that may be tricky politically or legally.

Ben

On Mon, Dec 22, 2008 at 4:49 PM, Simon Morgan <email address hidden> wrote:
> BenM: I don't think that's the same problem.
>
> I didn't have the problem with Hardy and my drive can play/read
> everything fine which leads me to believe that the errors are spurious.
> It seems that they aren't in your case and there may be a genuine
> problem with your hardware (or maybe you don't have libdvdcss
> installed).
>
> --
> IO errors when inserting a disc
> https://bugs.launchpad.net/bugs/304954
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in "linux" source package in Ubuntu: New
>
> Bug description:
> On inserting a disc into my DVD-RW drive, I very often got some serious looking I/O errors in the kernel logs. At first I put this down to hardware failure and bought a new drive. However, I not only have the same problem with the new drive, but the way the problem manifests intself leads me to believe it could possibly be a kernel bug. The old drive was a Pioneer DVD-RW DVR-108 and the new one is a Pioneer Pioneer DVD-RW DVR-116D.
>
> The errors only appear when I insert a disc into the drive. Not only that but I can do things like playback DVD movies and read entire discs (I tested using dd_rescue) without a single I/O error appearing in the kernel logs.
>
> The type of disc also has a bearing on the problem.
>
> If I insert a data DVD into the drive, I don't get any errors.
> If I insert a video DVD I get the following kind of errors:
>
> [ 3130.194461] end_request: I/O error, dev sr0, sector 16039324
> [ 3130.248798] end_request: I/O error, dev sr0, sector 16039320
> [ 3130.302954] end_request: I/O error, dev sr0, sector 16039328
> [ 3130.303145] UDF-fs: Partition marked readonly; forcing readonly mount
> [ 3130.398541] UDF-fs INFO UDF: Mounting volume 'ADAM_AND_JOE', timestamp 2006/03/09 09:54 (1000)
>
> If I insert a data CD into the drive, I don't get any errors.
> Audio CDs give the following error:
>
> [ 4267.245458] end_request: I/O error, dev sr0, sector 0
> [ 4267.245477] Buffer I/O error on device sr0, logical block 0
> [ 4267.245486] Buffer I/O error on device sr0, logical block 1
> [ 4267.245503] Buffer I/O error on device sr0, logical block 2
> [ 4267.245509] Buffer I/O error on device sr0, logical block 3
> [ 4267.245515] Buffer I/O error on device sr0, logical block 4
> [ 4267.245521] Buffer I/O error on device sr0, logical block 5
> [ 4267.245527] Buffer I/O error on device sr0, logical block 6
> [ 4267.245533] Buffer I/O error on device sr0, logical block 7
>
> I think this may have to do with the dialog that pops up when I insert a disc into the drive (the one that asks which program you want to launch), or something related to it. It seems that whenever that dialog appears, I get the I/O errors. Maybe whatever is scanning the disc to detect what type it is is doing something weird, resulting in the errors?
>
> ProblemType: Bug
> Architecture: amd64
> CurrentDmesg:
>
> DistroRelease: Ubuntu 8.10
> NonfreeKernelModules: nvidia
> Package: linux-image-2.6.27-9-generic 2.6.27-9.19
> ProcCmdLine: root=UUID=03a1e31a-442c-4616-ac13-e1b6005c5ba5 ro quiet splash
> ProcEnviron:
> PATH=/home/username/bin:/home/username/.cabal/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
> LANG=en_GB.UTF-8
> SHELL=/bin/bash
> ProcVersionSignature: Ubuntu 2.6.27-9.19-generic
> SourcePackage: linux
>