A workaround for my Rev-B 20" 1.8ghz G5 iMac which doesn't get cd
detection, involved the use of two cdrom/dvd drives to get Hardy Alpha
installed.

I attached a firewire cdrom and burnt two copies of the install iso and
placed them in each drive.  I booted from the internal drive by holding
down the "C" key, and the installer starts.  Once hardy gets to the
point of not being able to detect the internal drive, install picks
right up from the firewire drive which also has a copy of the alpha in
it.

In the end, I have no internal cdrom detection, but at least the alpha
is installed.  Note that I couldn't actually just boot from the external
firewire cdrom drive, so I had to do this tricky dual-disk setup
initially.

Unfortunately for me, it doesn't seem like G5 thermal support is
working, so the exhaust fans just scream making alpha testing
unbearable.  Bug filed - maybe no g5_defconfig?  Anyway, that's a
different bug post.

I'll try the modprobe techniques to see if I can get the cdrom detected
post-install.

-- 
IDE drivers not loaded at boot with powerpc
https://bugs.launchpad.net/bugs/126337
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