http://bugzilla.kernel.org/show_bug.cgi?id=10884





------- Comment #57 from [EMAIL PROTECTED]  2008-12-02 19:44 -------
Thanks, that explained what was going on.

With ACPI turned on, bits 16-17 of 00:1f.1:54-57 which is the SIG_MODE of
IDE_CONFIG register is set to 01b which is Tri-state (Disabled) while with ACPI
off it's 00b - Normal (Enabled).  The signal pins are tristated and thus the
controller can't see the device.  This probably has something to do with ACPI
docking support.  cc'ing Holger Macht.  Holger, with ACPI turned on, this
laptop tristates the IDE port and thus fail to detect the cdrom attached there.
 This smells like something regarding the dock didn't go as planned.  Any
ideas?

eek... Holger is not registered to OSDL bz.  I'll ask him to take a look via
email.


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