[OpenIndiana-discuss] A KVM switch broke my server?! Lightdm is panic'ing the kernel

[Carl Brewer]

I've almost finished setting up my new i5/NVIDIA 1030 server. latest pkg 
image-update today, my WD red pros arrived at last so I could build my 
ZFS mirror for the data store, it's all coming together.  I've turned 
off atime on rpool and my other zpools. Rebooted, everything seems fine.

Everything works on my dining room table, rebooted, it's solid. So it's 
time to move it into the rack in my office.

I have a HDMI and USB KVM switch I plug it into. Not really paying much 
attention, I didn't watch the console when it booted, I don't think I 
even had it plugged in to a monitor at the time.

Long story short, it keeps kernel panic'ing if lightdm is enabled. I can 
boot without lightdm and it's fine. I'd like the GUI though.  The ASCII 
console is pretty close to useless, it's slow as mud.  Inherited that 
from SPARC I guess ... In the OId Days, when I had a Sun 3/60(!) as my 
desktop, the ASCII console was faster. heh.  IPX, Sparc 2, no quicker. I 
never cared, I ran X11 on them, meh ...

Things I have tried, after getting rid of the KVM switch from the situation.

Connected directly to the original (previously working) monitor with the 
originally working HDMI cable.

Replacing the 1030 with a NVIDIA 1660 GFX card I had lying around.

different HDMI cable

different monitor

HDMI/SVGA adaptor cable instead of KVM switch

No luck. I've even tried booting off the (working, or it used to!) USB 
drive Aurelian set up for me. It won't boot lightdm up. Kernel panic. I 
don't get it. It worked this afternoon!  Reverted back to last week's OI 
boot environment (which worked!), nope ...

I'm stumped, short of resetting the BIOS, I can't think of anything else 
to try to revert it back to how it was 4 hours ago when it worked on the 
table! It's back there now, and I can log in remotely.

If anyone has any suggestions for how to debug it? Or how to just get at 
it using a VNC client - all the "set up VNC for OI" instructions I've 
found are ancient and don't mention lightdm. If I can't have a GUI 
console, that's ok, as long as I can get at it using VNC.

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