svn commit: r297190 - head/sys/kern

[Edward Tomasz Napierala]

On 0322T2113, Rick Macklem wrote:
> Ian Lepore wrote:
> > On Tue, 2016-03-22 at 13:46 +0000, Edward Tomasz Napierala wrote:
> > > Author: trasz
> > > Date: Tue Mar 22 13:46:01 2016
> > > New Revision: 297190
> > > URL: https://svnweb.freebsd.org/changeset/base/297190
> > > 
> > > Log:
> > >   Wait for root mount tokens before showing the root mount prompt.
> > >   This restores the pre-r290196 behaviour, eliminating the need to manually
> > >   press '.' a couple of times to get USB to finish probing.
> > >   
> > >   Note that there's still something wrong with the console (character
> > >   echoing doesn't quite work), and there's also a reported problem with
> > >   BHyVe, but those two don't seem related to the problem above.
> > 
> > Just a datapoint on the echoing... it works fine on a serial console,
> > it's been years since I've seen glitches at the mountroot prompt.  So
> > the problem may be in vt or kbdmux.
> > 
> When I had a console character echo problem (not serial), changing the
> clock source to RTC fixed it.

Just for the record, doing "set kern.eventtimer.timer=RTC" in loader(8)
prompt didn't change anything wrt character echo.

I've submitted a PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208239