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hdparm hangs in G4 cdrom


the command hdparm -c1 or -c3 hangs and never returns on my iBook G4 12"
CD-combidrive. I'm using the ide driver. And it isn't possible to set the
drive on udma2

$ hdparm /dev/cdrom

 HDIO_GET_MULTCOUNT failed: Invalid argument
 IO_support   =  0 (default 16-bit)
 unmaskirq    =  1 (on)
 using_dma    =  1 (on)
 keepsettings =  0 (off)
 readonly     =  1 (on)
 readahead    = 256 (on)
 HDIO_GETGEO failed: Invalid argument
$ hdparm -i /dev/cdrom


 Model=MATSHITACD-RW CW-8123, FwRev=CA0T, SerialNo=
 Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
 RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
 BuffType=unknown, BuffSize=0kB, MaxMultSect=0
 (maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
 IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4 
 DMA modes:  sdma0 sdma1 sdma2 mdma0 mdma1 *mdma2 
 UDMA modes: udma0 udma1 udma2 
 Drive conforms to: device does not report version: 

 * signifies the current active mode

Bye, Joerg.

"UNIX was not designed to stop people from doing stupid things, because
 that would also stop them from doing clever things."
         -- Doug Gwyn

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