Hello Khalid, > Are you not loading the driver for your disk drive controller when the > new kernel boots up, even though you are not using the driver for disk > I/O? If yes, the driver should have re-enabled Bus Master bit in its > init routine. If you are loading the driver, which driver is it? I can > take a look at it and see if there is anything missing in the > initialization routine. Can you also include output from "lspci -v" from > your machine? I'm not loading any drivers in my new kernel, I'm just doing pure BIOS disk I/O using Int13 calls (the program I start using kexec I would not actually call a 'kernel', it's just a very tiny piece of software which does some disk I/O and output on the screen). Attached you find the output of lspci -v Best regards Christian -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: lspic_d520.txt URL: <http://lists.infradead.org/pipermail/kexec/attachments/20120910/db9df3ce/attachment-0001.txt>