Comment 34 for bug 228624

I have the same problem. I tried the all_generic_ide option, and this (+reboot) fix the problem with one DVD for me, but I have another DVD that still will not rip (using vobcopy -m).

[ 0.000000] Kernel command line: root=UUID=3535bf16-9ea9-4577-ab9e-9b0af65de21c ro quiet splash all_generic_ide

root@HTPC01:/proc/sys/kernel# uname -a
Linux HTPC01 2.6.24-19-generic #1 SMP Wed Jun 4 16:35:01 UTC 2008 i686 GNU/Linux

root@HTPC01:/boot/grub# hdparm -i /dev/scd0

/dev/scd0:

 Model=PHILIPS SPD6104P , FwRev=NP03 , SerialNo=
 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes: pio0 pio3 pio4
 DMA modes: *sdma0 *sdma1 *sdma2 sdma? mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5
 AdvancedPM=no
 Drive conforms to: Unspecified: ATA/ATAPI-4,5,6,7

 * signifies the current active mode