Date: Mon, 14 Jul 2003 12:54:33 -0400 From: "fbsd_user" <fbsd_user@a1poweruser.com> To: "Gary W. Swearingen" <underway@comcast.net>, <freebsd-questions@freebsd.org> Subject: RE: dmesg(.boot) has no useful boot messages Message-ID: <MIEPLLIBMLEEABPDBIEGMEJLEBAA.fbsd_user@a1poweruser.com> In-Reply-To: <0tel0tagy4.l0t@mail.comcast.net>
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If you all talking about the scroll lock history to capture all of
the boot messages.
You have to increase the buffer size beyond the default value of the
kernel option SC_HISTORY_SIZE.
adding 'options SC_HISTORY_SIZE=1000' to the kernel source and
recompile, will capture the first 1000 lines of the boot messages.
Note this option reserves real memory which can not be used for
anything else. The last 1000 lines displayed on the console is all
ways scrollable by hitting the 'scroll lock keyboard key' followed
by the up arrow key to scroll through the buffer.
-----Original Message-----
From: owner-freebsd-questions@freebsd.org
[mailto:owner-freebsd-questions@freebsd.org]On Behalf Of Gary W.
Swearingen
Sent: Monday, July 14, 2003 12:08 AM
To: freebsd-questions@freebsd.org
Subject: dmesg(.boot) has no useful boot messages
I've just switched from 4.8 to 5.1-CURRENT and all the dmesg files
are full of stuff that I've never seen before, like this:
6 start_16_io RW *Handler
307 start_32_io RW *Handler
308 debug RW *Handler
309 pci R Node
310 enable_io_modes RW *Handler Int
311 allow_unsupported_io_range R *Handler Int
327 usb RW Node
328 wi R Node
329 txerate RW *Handler Int
330 debug RW *Handler Int
which would be OK, except that all the more useful messages seem to
get scrolled off the end of the dmesg buffer so if you can't read
the
boot messages while they're flashing by on the boot console your out
of luck. I see nothing about it in UPDATING or the handbook.
How do I turn off the more useless debugging boot messages or make
the
dmesg buffer larger?
Thanks.
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