[Bug 42083] impossible to read a dvd

[Nicolas Gruel]

Public bug reported:

Affects: linux-source-2.6.15 (Ubuntu)
       Severity: Normal
       Priority: (none set)
         Status: Unconfirmed


Description:
I have a Thinkpad z60m and I cna use the dvd-rw but I can't read any
dvd. Each time I tried with mplayer, kaffeine or totem-xine I have a lot
message from the kernel like:

[4298917.367000] printk: 573 messages suppressed.
[4298917.367000] Buffer I/O error on device sr0, logical block 5062
[4298917.378000] end_request: I/O error, dev sr0, sector 20248
[4298917.389000] end_request: I/O error, dev sr0, sector 20256
[4298917.400000] end_request: I/O error, dev sr0, sector 20256
[4298917.411000] end_request: I/O error, dev sr0, sector 20264

The strange thing is I can mount and check at the data on the dvd
without any problem.

I have libdvdcss install and the player began to read the dvd until it's
freeze and I give me the message from the kernel.

The dvd is using sata so perhaps it's link to the problem. It's
impossible to turn on the dma on mu HD and dvd:

~$ sudo hdparm -d1 /dev/sda
Password:

/dev/sda:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device

sudo hdparm -d1 /dev/sr0

/dev/sr0:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Inappropriate ioctl for device

thanks

-- 
impossible to read a dvd
https://launchpad.net/bugs/42083