[mythtv-users] DVD Error - [sr0] unaligned transfer

[Brian Wood]

On Monday 18 January 2010 08:05:47 am coffee wrote:
> I guess Iam new to the list although I did get it probably a few years
> ago. Nice to be back on the list.
> I would like to say that Iam very impressed with Mythtv and the coders.
> I started using mythtv at around
> version .18 and it has really improved.
> 
> I noticed that after getting MYTV installed that I cannot watch DVDs.
> Iam getting the following error in my
> logs: mythtv kernel: sr 5:0:0:0: [sr0] unaligned transfer.
> 
> The dvd drive is known working. Originally I thought this might be a bad
> DVD but it happens on every dvd put in.
> The dvd will play the beginning intro (the short Studio Intro) and then
> goes back to the play dvd menu.
> 
> Well, Here is some info on the system :
> 
> Log File:
> 
> Jan 18 00:02:17 mythtv kernel: sr 5:0:0:0: [sr0] unaligned transfer
> Jan 18 00:02:17 mythtv kernel: sr 5:0:0:0: [sr0] unaligned transfer
> Jan 18 00:02:18 mythtv gnome-keyring-daemon[2239]: adding removable
> location: volume_label_QUARANTINE at /media/QUARANTINE
> Jan 18 00:02:19 mythtv kernel: attempt to access beyond end of device
> Jan 18 00:02:19 mythtv kernel: sr0: rw=0, want=13330436, limit=2097151
> Jan 18 00:02:19 mythtv kernel: Buffer I/O error on device sr0, logical
> block 3332608
> Jan 18 00:02:19 mythtv kernel: attempt to access beyond end of device
> Jan 18 00:02:19 mythtv kernel: sr0: rw=0, want=13330436, limit=2097151
> Jan 18 00:02:19 mythtv kernel: Buffer I/O error on device sr0, logical
> block 3332608
> 
> System Specs:
> 
> Linux mythtv.athome.net 2.6.30.10-105.fc11.x86_64 #1 SMP Thu Dec 24
> 16:41:51 UTC 2009 x86_64 x86_64 x86_64 GNU/Linux
> 
> Myth Version .22
> 
> Fedora Core 11
> [root at mythtv log]# dmesg |grep sr0
> sr0: scsi3-mmc drive: 48x/48x writer cd/rw xa/form2 cdda tray
> 

Try taking Myth out of the equation, can you play a DVD with other software? 
Xine?

From what I see, it doesn't look like a Myth problem, but that's easy to test.