Accessing CDROM drive in laptop SATA/PATA hardware config

Hello,
I have a Toshiba M40X-112 laptop.
So far I am quite happy with it, but the DVD-writer does not work. I am getting loads of:

---snip---

Aug 6 13:39:01 satellita kernel: sr0: CDROM not ready. Make sure there is a disc in the drive. Aug 6 13:39:32 satellita last message repeated 31 times
---snap---

I have googled around and this problem comes up quite a few times. Most remedies deal with older kernels and so far I cannot figure out a way to make it work.

When I look at kernel messages, there is:
---snip---

Aug  6 13:39:01 satellita kernel: sr0: CDROM not ready.  Make sure there is a disc in the drive.
Aug 12 17:02:36 satellita kernel: ahci: probe of 0000:00:1f.2 failed with error -22
Aug 12 17:02:36 satellita kernel: ata_piix 0000:00:1f.2: MAP [ P0 P2 IDE IDE ]
Aug 12 17:02:36 satellita kernel: ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 19
Aug 12 17:02:36 satellita kernel: scsi0 : ata_piix
Aug 12 17:02:36 satellita kernel: scsi1 : ata_piix
Aug 12 17:02:36 satellita kernel: ata1: SATA max UDMA/133 cmd 0x000101f0 ctl 0x000103f6 bmdma 0x000118b0 irq 14
Aug 12 17:02:36 satellita kernel: ata2: PATA max UDMA/100 cmd 0x00010170 ctl 0x00010376 bmdma 0x000118b8 irq 15

So for me it looks like the ahci module is giving up and ata_piix is taking over.
lsmod prints out:
---snip---

Aug 6 13:39:01 satellita kernel: sr0: CDROM not ready. Make sure there is a disc in the drive.

sr_mod                 17284  1 
cdrom                  33568  1 sr_mod
sd_mod                 27904  6 
ata_piix               14148  6 
ahci                   22020  0 
ata_generic             8324  0 
libata                116624  3 ata_piix,ahci,ata_generic
scsi_mod              137388  5 firewire_sbp2,sg,sr_mod,sd_mod,libata

lspci shows:
---snip---

00:1f.2 IDE interface: Intel Corporation 82801FBM (ICH6M) SATA Controller (rev 03)
---snap---

kernel command line is:
---snip---

Aug 12 17:02:36 satellita kernel: Kernel command line: root=/dev/sda5 ro libata.atapi_enabled=1
---snap---

So I have tried this libata.atapi_enabled=1 option, but this doesnt help.

Do you need help?

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Any advice?
Thanks Thomas

-- 
Thomas Hahn == thahn01@t-online.de


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