Public bug reported:

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

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug

-- 
IO errors when inserting a disc
https://bugs.launchpad.net/bugs/304954
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