Looking at the hardy boot we can see that the cdrom is on IDE (as we
would expect). We believe that it is the slave on the first channel:
[ 38.531261] hdb: host max PIO4 wanted PIO255(auto-tune) selected PIO4
[ 38.531534] hdb: UDMA/33 mode selected
[ 38.531827] ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
[ 38.554642] hdb: ATAPI 40X DVD-ROM CD-R/RW drive, 1536kB Cache
If we look at the karmic boot we see the following:
[ 0.717102] pata_atiixp 0000:00:14.1: PCI INT A -> GSI 16 (level, low)
-> IRQ 16
[ 0.717229] scsi4 : pata_atiixp
[ 0.717372] scsi5 : pata_atiixp
[ 0.718087] ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xf900 irq
14
[ 0.718090] ata6: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xf908 irq
15
[...]
[ 1.000067] ata5.01: NODEV after polling detection
Looking at the trigger for this message we find that is can only be
emmitted when talking to a PATA device, there seem to be three ways this
can be triggered, though the second of these ought to emit a message:
/* If diagnostic failed and this is
* IDENTIFY, it's likely a phantom
* device. Mark hint.
*/
or
/* HSM violation. Let EH handle this.
* Phantom devices also trigger this
* condition. Mark hint.
*/
or
/* There are oddball controllers with
* status register stuck at 0x7f and
* lbal/m/h at zero which makes it
* pass all other presence detection
* mechanisms we have. Set NODEV_HINT
* for it. Kernel bz#7241.
*/
It might be informative to know which of these it is however. I have
added some diagnostics for these various cases and built test kernels.
Perhaps you could test those and report back here. There should be some
APW: lines in the dmesg output, if you could attach that from the debug
kernel. Kernels can be found at the URL below:
http://people.canonical.com/~apw/lp425756-karmic/
** Changed in: linux (Ubuntu)
Status: Triaged => Incomplete
--
[regression karmic] cd/dvd drive not detected
https://bugs.launchpad.net/bugs/425756
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