Paul Rogers wrote:
So, my LFS-7.2 install is complete, and apparently functional. Last
month I asked about updating the kernel in the LFS-7.2 I've been
building. Ken suggested going fro the 3.5.2 up to 3.14. I decided to
make that in two jumps, stopping first at 3.10.62-LTS.
There were interruptions. I've built that now, but during boot there
appears to be something dumping some data on the console about once a
second! It's hard to tell exactly when it starts. When it gets to the
Login prompt, I've only got about one second to use Shift-PgUp before
the next console write jerks me back. At that point it's "00 00 00 00
00 00"; no identifier of who's doing it or what it means I've seen. It
might be after udev starts, but I'm not sure. It's got to be something
introduced in the 3.10.62 kernel, because I don't see this with 3.5.2.
So I've a few questions:
1) Does it ring any bells with anyone who's seen it before?
2) Anybody got any ideas how I can get more clarity about where it's
coming from and why?
Does it show up in dmesg or /var/log/sys.log?
3) The USB drivers and udev make the console incredibly noisy about
then. How can I get that off the console and redirected to the
bootlog for use if it becomes a debugging issue?
Sometimes I see network driver messages during boot. That's why
/etc/sysconfig/rc.site was created. Try setting LOGLEVEL=4 there. The
default LOGLEVEL (5) is a little noisy.
4) I've read the LFS page about selecting kernel parameters. It's
pretty basic. I've gone through every one of the kernel parameters
and selected those that seemed good for an uncustomized, any sort of
typical PC/i686 hardware, initial boot. Some I didn't fully
understand, so made my best guess. I know about the kernel-newbies
site, helpful interpretting the kernel changelogs. But is there some
site that gives good information about what all the parameters mean,
beyond what the kernel config itself presents in its "Help"? A site
the kernel team keep current for each kernel release, hopefully.
The best starting place for the kernel is 'make defconfig'. 'make help'
gives a lot of other options. Generally the help page for each option
gives a reasonable summary, but takes a long time to go through everything.
-- Bruce
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