Plugging the hard disk to IDE1 or IDE2 worked as a workaround for me.
So I confirm that it looks like a bug of Grub2, related to HPT controllers.
It is a regression as it is working fine with Grub
Niels : this workaround should probably work for you too. I had to disconnect any drive of the HPT ports (and put both CD/DVD drives on a single port with master/slave)
The sad news is that the hard disk is probably slower as it is Ultra-DMA-100 instead of Ultra-DMA-133. But at least it works.
Plugging the hard disk to IDE1 or IDE2 worked as a workaround for me.
So I confirm that it looks like a bug of Grub2, related to HPT controllers.
It is a regression as it is working fine with Grub
Niels : this workaround should probably work for you too. I had to disconnect any drive of the HPT ports (and put both CD/DVD drives on a single port with master/slave)
The sad news is that the hard disk is probably slower as it is Ultra-DMA-100 instead of Ultra-DMA-133. But at least it works.