IDE/ATA: Intel i865-based mainboard, CDROM not detected

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A collegue of mine has an Intel mainboard with the i865 chipset onboard
(DQ965).  All kernels up to and including 2.6.22-rc2 do not detect the IDE
CDROM/DVDROM when booting.  The SATA hard drive is found without any
problems.

Relevant parts from lspci:

  00:1f.2 0101: 8086:2820 (rev 02)
  00:1f.2 IDE interface: Intel Corporation 82801H (ICH8 Family) 4 port SATA
  IDE Controller (rev 02) (prog-if 8f [Master SecP SecO PriP PriO])
        Subsystem: Intel Corporation Unknown device 514d
        Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19

  00:1f.5 0101: 8086:2825 (rev 02)
  00:1f.5 IDE interface: Intel Corporation 82801H (ICH8 Family) 2 port SATA
  IDE Controller (rev 02) (prog-if 85 [Master SecO PriO])
        Subsystem: Intel Corporation Unknown device 514d
        Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 19

What's interesting here is that 00:1f.2 and 00:1f.5 are both identified as
"n port SATA" controllers even though one of them (I suspect 00:1f.5) is a
PATA controller.  This may just be a typo in lspci's database though.

Boot messages:

  ide: Assuming 33MHz system bus speed for PIO modes; override with idebus=xx
  Probing IDE interface ide0...
  Probing IDE interface ide1...
  :
  ata_piix 0000:00:1f.2: version 2.11
  ata_piix 0000:00:1f.2: MAP [ P0 P2 P1 P3 ]
  ACPI: PCI Interrupt 0000:00:1f.2[A] -> GSI 19 (level, low) -> IRQ 19
  PCI: Setting latency timer of device 0000:00:1f.2 to 64
  scsi0 : ata_piix
  scsi1 : ata_piix
  ata1: SATA max UDMA/133 cmd 0x00012138 ctl 0x00012156 bmdma 0x00012110 irq 0
  ata2: SATA max UDMA/133 cmd 0x00012130 ctl 0x00012152 bmdma 0x00012118 irq 0
  ata1.00: ata_hpa_resize 1: sectors = 488397168, hpa_sectors = 488397168
  ata1.00: ATA-7: WDC WD2500AAJS-00RYA0, 12.01B01, max UDMA/133
  ata1.00: 488397168 sectors, multi 16: LBA48 NCQ (depth 0/32)
  ata1.00: ata_hpa_resize 1: sectors = 488397168, hpa_sectors = 488397168
  ata1.00: configured for UDMA/133
  ATA: abnormal status 0x7F on port 0x00012137
  scsi 0:0:0:0: Direct-Access     ATA      WDC WD2500AAJS-0 12.0 PQ: 0 ANSI: 5
  sd 0:0:0:0: [sda] 488397168 512-byte hardware sectors (250059 MB)
  sd 0:0:0:0: [sda] Write Protect is off
  sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
  sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
  sd 0:0:0:0: [sda] 488397168 512-byte hardware sectors (250059 MB)
  sd 0:0:0:0: [sda] Write Protect is off
  sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
  sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
  sda: sda1 sda2
  sd 0:0:0:0: [sda] Attached SCSI disk
  ata_piix 0000:00:1f.5: MAP [ P0 P2 P1 P3 ]

Here the HDD is clearly detected while the CDROM/DVDROM (attached to ide0)
isn't.

libata is compiled into the kernel as is the non-libata PATA driver.
In the libata configuration, only SATA_AHCI, ATA_PIIX and ATA_GENERIC are
defined.  For the non-libata side of things most options are selected
including BLK_DEV_IDE, BLK_DEV_IDECD, IDE_GENERIC, BLK_DEV_IDEPCI, 
BLK_DEV_GENERIC, BLK_DEV_IDEDMA_PCI and BLK_DEV_PIIX.

Does anyone have any ideas as to why there is a problem detecting the PATA
(IDE) CDROM/DVDROM in this machine?  Further information/testing can be
provided if requested.

Regards
  jonathan
--
"Time is an illusion; lunchtime doubly so"
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