DragonFly BSD
DragonFly users List (threaded) for 2004-12
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Re: Laptop and live cd

From: Bryan Berch <dfbsd@xxxxxxxxxxxxx>
Date: Sun, 26 Dec 2004 16:28:17 -0500

Matthew Dillon wrote:

Ouch. If 4.6 doesn't boot then it isn't an El Torito emulation
issue. It sounds like the loader is overwriting memory that the BIOS is using.

I can only think of one thing.

   ESC out of the boot sequence before boot2 is able to load
   /boot/loader.  There is a very short interval of time after you hit
   e.g. F1 from boot0 where boot0 loads boot1 and boot2 and then boot2
   tries to load /boot/loader.  If you hit ESC a few times immediately
   after hitting F1 from boot0 you should be able to break into the
   boot2 prompt.

From the boot2 prompt you could try booting the /kernel directly
rather then /boot/loader.

If that works then the problem is likely related to BTX emulation,
but its virtually undebuggable so finding the cause might be impossible. If that doesn't work then the problem is likely due
to the BIOS needing memory that the boot loader is overwriting. There
is no real fix for that sort of thing without knowing exactly what
the problem is.

Matthew Dillon <dillon@xxxxxxxxxxxxx>

From what I have found on the internet it is happening on the Compaq Persario R3000 no matter what processor is in it: P4, Athlon or Athlon64 on FreeBSD 5.x and 4.x, with it possibly fixed now. NetBSD and Linux appear not to have a problem with the HP/Compaq, but this is a problem with the new laptops. There appears to be a patch on the thread at:


If I knew enough on how to put that in an iso I would have tried it to see if it works. Hope this info can help solve the problem. Best I can do. More than happy to test a live cd to see if it works.


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