Re: "seeing minute plus hangs during boot" - 2.6.12 and 2.6.13

[Andrew Morton <akpm@osdl.org>]

"Francisco Figueiredo Jr." <fxjrlists@yahoo.com.br> wrote:
>
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> Andrew Morton wrote:
> > "Francisco Figueiredo Jr." <fxjrlists@yahoo.com.br> wrote:
> > 
> >>Indeed udev update solved my problem with "preparing system to use udev"
> >> hang. It now works like a charm. I had 030 version too.
> >>
> >> Only the "mounting filesystem" hangs persists :(
> > 
> > 
> > Please use ALT-SYSRQ-T to generate an all-task backtrace, then send it to the
> > list.
> > 
> 
> 
> Hi Andrew.
> I was not able to get anything when I press this key sequence.
> 
> I checked my sysrq key with showkey -s as this doc
> (http://snafu.freedom.org/linux2.2/docs/sysrq.txt) says and I could
> confirm that alt+sysrq is sending 0x54.
> 
> I also noted that many said that this option has to be compiled in
> kernel, but I couldn't find this option.
> 
> Can you give me some tips?
> 

(Please leave the cc list unchanged - always do reply-to-all)

hm, maybe do alt-sysrq-7 to make sure that the loglevel is appropriately set.

Or do alt-sysrq-B to test that the whole sysrq thing is working.  If it is,
that will reboot the machine.