On Thu, 14 Jan 2016, Slawa Olhovchenkov wrote:
On Fri, Jan 15, 2016 at 06:27:05AM +1100, Bruce Evans wrote:
The BREAK_TO_DEBUGGER option used to mean: enter (not break into) the
debugger using a serial line break. This is a good method, except it
...
This option was broken to mean: the default for the sysctl that controls
"breaking into" the debugger using either a serial line break or the console
key for "breaking into" the debugger. For almost perfection confusion,
this key is normally the "Ctrl-Print Screen" key on PC keyboards and
there is a "Break" key nearby. Ctrl-Alt-Esc also works. syscons(4)
On may keyboard "Break" subscribe to "Pause", to "Print Screen"
subscribe "SysReq".
This is similar but not quite the same on all 6 of my (US) keyboards
(except it is the same on 2 identical models). SysReq seems to be
going away and is only on my 2 20+ year old keyboards. PrintScreen is
is even more useless/unsupported for its original operation. But
my worst (and most expensive) keyboard axed ScrollLock before
PrintScreen. I use ScrollLock a lot under FreeBSD but never noticed
it doing anything elsewhere.
Bruce
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