Thanks Adrian.
Setup went mostly as expected on my rx2660. I did have to use “modprobe_blacklist=radeon nomodeset” to work around the Radeon GPU issue. GRUB was installed by default. Boots the current system just fine but can’t boot Wheezy (another partition) even though it is able to detect it. For Wheezy I still have to use ELILO 3.14 which I kept on a backup directory in my EFI part.
Tomorrow I’ll try it on the zx6000.
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Pedro