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DVDRW drive and 2.6.12-1-em64t-p4-smp



Hi!

I have a problem with my DVDRW drive when using kernel 2.6.12-1-em64t-p4-smp.  The SCSI emulation seems to be activated and my system freezes when I try to burn a DVD.  Here is the dmesg output when executing "modprobe ide-generic" :

ICH7: IDE controller at PCI slot 0000:00:1f.1
ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 18
ICH7: chipset revision 1
ICH7: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:pio, hdd:pio
Probing IDE interface ide0...
hda: HL-DT-ST DVDRAM GSA-4167B, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
ide-scsi is deprecated for cd burning! Use ide-cd and give dev=/dev/hdX as device
scsi2 : SCSI host adapter emulation for IDE ATAPI devices
  Vendor: HL-DT-ST  Model: DVDRAM GSA-4167B  Rev: DL10
  Type:   CD-ROM                             ANSI SCSI revision: 02
Probing IDE interface ide1...
Probing IDE interface ide1...
Probing IDE interface ide2...
sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray
Uniform CD-ROM driver Revision: 3.20
Attached scsi CD-ROM sr0 at scsi2, channel 0, id 0, lun 0
Attached scsi generic sg0 at scsi0, channel 0, id 0, lun 0,  type 0
Attached scsi generic sg1 at scsi2, channel 0, id 0, lun 0,  type 5
sr0: Hmm, seems the drive doesn't support multisession CD's
cdrom: This disc doesn't have any tracks I recognize!
Probing IDE interface ide3...
Probing IDE interface ide4...
Probing IDE interface ide5...


The problem isn't present with 2.6.12-1-amd64-generic where SCSI emulation seems to be deactivated and I don't have problem to burn DVDs.  Here is the dmesg output when executing "modprobe ide-generic" :

ICH7: IDE controller at PCI slot 0000:00:1f.1
ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 18
ICH7: chipset revision 1
ICH7: not 100% native mode: will probe irqs later
    ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:DMA, hdb:pio
    ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:pio, hdd:pio
Probing IDE interface ide0...
hda: HL-DT-ST DVDRAM GSA-4167B, ATAPI CD/DVD-ROM drive
ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
Probing IDE interface ide1...
Probing IDE interface ide1...
Probing IDE interface ide2...
hda: ATAPI 79X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20
cdrom: This disc doesn't have any tracks I recognize!
Probing IDE interface ide3...
Probing IDE interface ide4...
Probing IDE interface ide5...


What is the difference between the two kernels?  Why one is with SCSI emulation?  Is it normal?  What can I do to use 2.6.12-1-em64t-p4-smp without SCSI emulation?

Thank you,

Jean-François


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