Hello, It seems to me, that the 'ahd' driver got some problems on both 5.4-STABLE and 6.0-BETA1. My hardware is a HP Workstation 6000, with an on-board Adaptec SCSI controller, which is disabled in BIOS, as I only have IDE CD- and harddrives. I start with 6.0-BETA1, as it's the easier one: when I boot the install CD, it finds the controller, writes "Unable to read SEEPROM", it waits a few seconds, writes another 20 lines of error messages on screen, then reboots the computer, so there isn't time to read the rest of messages and can't install the beta. 5.4-STABLE: simptoms are the same on my installed 5.4-STABLE machine, I can read "Unable to read SEEPROM", it waits, prints some more messages, and reboots. When I boot an older kernel (from the 29th of June), the kernel finds the controller, and works fine. Compiling a kernel without ahd support (commenting out: '#device ahd') solves the problem as well, and the machine boots fine. This is part of dmesg from the old kernel: Jul 20 13:48:02 beech kernel: ahd0: <Adaptec AIC7902 Ultra320 SCSI adapter> at device 12.0 on pci5 Jul 20 13:48:02 beech kernel: aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI 33 or 66Mhz, 512 SCBs Jul 20 13:48:02 beech kernel: ahd1: <Adaptec AIC7902 Ultra320 SCSI adapter> at device 12.1 on pci5 Jul 20 13:48:02 beech kernel: aic7902: Ultra320 Wide Channel B, SCSI Id=7, PCI 33 or 66Mhz, 512 SCBs Bye, Peter