Date: Tue, 5 Dec 2006 14:14:18 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Jed Donnelley <jed@nersc.gov> Cc: freebsd-bugs@FreeBSD.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: misc/106091: Keyboard disabled at mountroot> prompt Message-ID: <20061205191418.GA27029@xor.obsecurity.org> In-Reply-To: <7.0.1.0.0.20061204092852.012d0d70@nersc.gov> References: <7.0.1.0.0.20061204092804.035556a8@nersc.gov> <7.0.1.0.0.20061204092852.012d0d70@nersc.gov>
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On Mon, Dec 04, 2006 at 03:07:00PM -0800, Jed Donnelley wrote: > At 09:28 AM 12/4/2006, Kris Kennaway <kris@obsecurity.org> wrote: > >On Fri, Dec 01, 2006 at 02:30:17AM +0000, Kris Kennaway > ><kris@obsecurity.org> wrote: > >> The following reply was made to PR misc/106091; it has been noted by > >GNATS. > >> > >> From: Jed Donnelley <jed@nersc.gov> > >> To: Ruslan Ermilov <ru@FreeBSD.org> > >> Cc: bug-followup@FreeBSD.org > >> Subject: Re: misc/106091: Keyboard disabled at mountroot> prompt > >> Date: Thu, 30 Nov 2006 18:23:39 -0800 > >> > >> At 06:17 PM 11/30/2006, Ruslan Ermilov <ru@FreeBSD.org> wrote: > >> >On Thu, Nov 30, 2006 at 08:42:48PM +0000, Jed Donnelley wrote: > >> > > In the process of setting up a gmirror I messed up my fstab. > >> > > When the boot process couldn't find a / to mount it dropped to the: > >> > > > >> > > mountroot> > >> > > > >> > > prompt. However, I found at that point that keyboard input was not > >> > > accepted. I ended up having to start a system from a CD in "rescue" > >> > > mode, mount the / file system from the hard drive and edit > >/etc/fstab > >> > > that way. > >> > > >> >Was it observed over a serial console? > >> > >> No, KVM. Is there some reason that facility is only available over > >> a serial console? The output displayed properly on the monitor > >> and of course with a proper boot off a CD or HD the keyboard input > >> worked properly. > >> > >> Thanks for considering this problem. > > > >No, but it's known that on a serial console input at the mountroot > >prompt is mostly ignored (i.e. if you press the key enough times it > >eventually does get accepted). This wouldn't apply to a KVM though. > > > >Does the keyboard work in the boot loader? i.e. if you tell the boot > >menu to escape to the loader. If not, it's something about your KVM > >that is the problem. > > The keyboard and display work fine in the boot loader - from the boot > prompt (before the mountroot> prompt), from the CD (whether in rescue > mode or when I was initially building the system) and of course from the > running system both before and after I corrected the fstab problem. > > I believe testing this problem is as simple as building a system (or even > using an existing system) and commenting out the / entry in the fstab. > Then reboot. After the system fails to come back up and presumably > waits in the mountroot> prompt, can you interact with it using the keyboard? Yes, if I'm using a real keyboard. > I just did another test of such a change on another system with a distinct > KVM configuration and different hardware. The behavior was the same. I > did notice that if I booted in SafeMode then I was able to use the keyboard > to mount the root file system (e.g. mountroot> ufs:/dev/mirror/gm0s1a ). > That's a helpful work around. OK, that's probably relevant but I don't know how. Kris
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