Re: [BUG] no boot with 2.6.21-rc3 and later

[john stultz <johnstul@us.ibm.com>]

On Wed, 2007-03-21 at 16:00 -0600, Bob Tracy wrote:
> john stultz wrote:
> > Hmmm. Are you able to capture a full dmesg?
> 
> For the "it hangs" case, short of either trying to boot with the
> console I/O redirected to a serial port or hooking up a printer to
> the console and scanning in the resulting output, I don't think so.
> There's too much output prior to the hang point to make manual
> transcription feasible.

Hmm. You could give netconsole a try(see
Documentation/networking/netconsole.txt), although if the hang is before
that inits you might be out of luck.

> > Also, does booting w/ "clocksource=jiffies" change the behavior?
> 
> I'll build a post-"bad"-commit kernel later this evening and let you
> know.  Unfortunately, real life has to intrude for a few hours :-).

No problem. When you can get to it. :)

Also trying booting w/ "notsc" would be a useful data point.

> If specifying the clocksource allows for a normal bootup, would you
> like to see the corresponding dmesg output?

No, although a pre-bad-commit dmesg would help.

thanks
-john