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DragonFly kernel List (threaded) for 2005-01
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Re: Ctrl-Alt-ESC during boot

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Wed, 26 Jan 2005 13:57:20 -0800 (PST)

:On Wed, 26 Jan 2005, Chuck Tuffli wrote:
:> boot -d does drop the OS into ddb, but after continuing, ctrl-alt-esc
:> doesn't break into ddb.
:I discovered (the hard way) that there is a kernel config option
:SC_DISABLE_DDBKEY which has that effect.  Is there any chance that
:the kernel on the CD was compiled with that option?  I suppose only(?)
:Matt would know.  The option is not in the GENERIC kernel but is
:in LINT.

    I'm a bit confused.  SC_DISABLE_DDBKEY disables your ability to
    enter the debugger through ctl-alt-esc.  Why would you want to have
    that option on by default?

    ctl-alt-esc does eventually work if I boot -d and then 'cont', but
    you have to realize that the system disables interrupts during early boot
    so it won't see a ctl-alt-esc that early in the boot sequence.

					Matthew Dillon 

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