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Kernel hangs trying to speak to DVD-ROM

I have this weird problem, and I would appreciate if someone could give me a hint on how to solve it: Whenever I connect a DVD-ROM drive (ANY DVD-Drive, not just a specific one) to my computer via the onboard IDE-connector, I cannot boot any more. The last message the kernel prints (actually, I think it's the ide-cd module) after getting hung up is this:

hdc: packet command error: status=0x51 { DriveReady SeekComplete Error }
hdc: packet command error: error=0x04
hdc: request sense failure: status=0x51 { DriveReady SeekComplete Error }
hdc: request sense failure: error=0x04Aborted Command

I tried using the first and the second IDE channel, using the drive as master and slave. The strange thing is that CD-drives work perfectly fine, this happens just with DVD-Drives. Those DVD-Drives work fine in another computer with the exact same kernel. My mainboard is a AK70 by DFI, I think the onboard IDE-controller is the AMD7409 (that's what the kernel says.) I use Linux 2.6.8-2. 2.4.x kernels don't work either, real old distributions with kernel 2.2 or lower do. After playing around a bit, I found the DVD works when I type "hdc=noprobe hdc=cdrom" on the kernel command line. But still, I cannot do that when trying to run the debian installer or installers of debian derivatives. When detecting the DVD-ROM drive, the installer just hangs and I can't do anything any more but reboot. I find this really strange, maybe someone has a clue. If not, thanks anyway for taking the time to read this message.
If you reply to this, please send me a CC.
Thank you,
David Dasenbrook

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