Hello Pete, Good info there. I'm running an AMD system, and disabling AMD-V similarly worked to allow the lkrn to boot.
Out of curiosity, I tried something kinda funny. I went into src/i386/transitions/libflat.S and put some comments around line 423, "call flatten_real_mode". That appears to be the function where the GDT is shuffled around into and then back out of PM. Compiled it, and, with AMD-V off, it still boots, pulls DHCP, and so on. Broke to the command line, initrd'ed a 136MB ISO, and then chained it with GRUB4DOS as a mem mapped disk. Booted just fine. :P Cheers, Andrew Bobulsky On Mon, Jan 24, 2011 at 10:44 AM, Pete I. Eby <[email protected]> wrote: > Hi Andrew, Michael, and Matthew, > > With this new information I did a bit more testing with Virtualbox. > First, I upgraded to the newer version of VirtualBox (4.0.0). I then > tried booting using an iPXE 1.0.0 .iso and of course it locked up when > loading ipxe.krn. > > I then selectively changed the CPU settings. I thought perhaps the NX > and / or VT cpu features might be contributing this to. > > Turns out that if you disable VT support, it will allow it to boot. (It > also loads with with NX enabled.) > > The intricacies of VT and it's relation to unreal mode are foreign to me > honestly, but at least this allows a temporary work around. > > Cheers, > Pete > > > > _______________________________________________ ipxe-devel mailing list [email protected] https://lists.ipxe.org/mailman/listinfo/ipxe-devel
