Question about 'gptzfsboot'

[Ian Lepore]

On Mon, 2019-04-29 at 14:47 -0400, Thomas Laus wrote:
> On 2019-04-29 14:27, Thomas Laus wrote:
> > It was more than a broken console.  All of the other 2 computers
> > that I
> > upgraded to r346885 were essentially 'dead'.  I could not even
> > remotely
> > login to them via ssh.  All of them required a hard power button
> > reset
> > to get into single user mode to let me comment out the rc.conf line
> > that
> > loads the DRM driver.  The computer could successfully boot without
> > DRM
> > activation but would go to a black console screen again with
> > 'startx'.
> > This also required a hard power button shutdown.  I rolled back to
> > r346544 and everything worked again like before.
> > 
> > My disastrous update to r346885 included installing a new
> > gptzfsboot and
> > pmbr in the drive boot record.  I did not try booting an older
> > kernel
> > using the new gptzfsboot.  I was concerned about the lack of ssh
> > login
> > when the computers lost their console, so I just rolled back my
> > system
> > to the last snapshot made a week ago.
> > 
> 
> Ian:
> 
> I re-activated the r346885 BEADM snapshot and booted from my
> 'kernel.old' from r346544 and everything came up OK including 'X'.
> 
> I don't know what that means.  It might be that I have a DRM issue
> instead of a gptzfsboot problem?  Everything except for the kernel is
> now running CURRENT r346885.  I am not using the updated
> drm-current-kmod because I am using the r346544 kernel.old.
> 
> Tom
> 
> 

I can't say anything at all about drm or other video driver issues, I'm
just not knowledgeable about that stuff at all.

The only thing I was getting at was that the changes I made in r346675
might make this error stop happening:

   gptzfsboot: error 1 LBA 18446744072709551608
   gptzfsboot: error 1 LBA 1
   gptzfsboot: No ZFS pools located, can't boot

Emphasis on the "might"... that appears to be an error during probing
for zfs, and I made some fixes related to probing for zfs.

-- Ian