Ah, okay, now we're getting somewhere.

cmm at ent2:/usr/local/lib/squeak/4.0-2776$ ldd vm-display-X11
linux-gate.so.1 =>  (0xf7722000)
libGL.so.1 => not found
libXext.so.6 => not found
libSM.so.6 => not found
libICE.so.6 => not found
libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xf76e8000)
libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0xf76cc000)
libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xf7686000)
libnsl.so.1 => /lib/i386-linux-gnu/libnsl.so.1 (0xf766c000)
libX11.so.6 => not found
libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf74bd000)
/lib/ld-linux.so.2 (0xf7723000)

So I think Nicolai was right -- 32-bit libs not installed.  Perhaps
running with -vm display=none somehow avoids the need for that
dependency..?

I recently upgraded this machine to Ubuntu 14.04 from 12.04.  I
thought I had run squeak since then but maybe I haven't.

With Ubuntu 12.04, one could install "ia32-libs" but that package is
no longer available with 14.04.  I actually have 14.04 on one of my
laptops where Squeak is working fine.  I just did ldd on that and it
referred to a bunch of :i386 packages..

Unfortunately, I'm not sure what magic incantation I must've used to
get all those packages installed on that 14.04 laptop.  I'll keep
digging but if someone knows, it'd be much appreciated..

On Tue, Jun 3, 2014 at 2:08 PM, Bert Freudenberg <bert at freudenbergs.de> wrote:
> On 03.06.2014, at 21:03, Chris Muller <asqueaker at gmail.com> wrote:
>>  It's not obvious to me which one is the X11 module..
>
> None. You need to run ldd not on the vm, but on the "vm-display-X11" module, which cannot be loaded according to the error message you got.
>
> - Bert -
>
>> I'm not sure -- here's the ldd output on a machine where Squeak is working fine:
>>
>> cmm at ent1:/usr/local$ ldd ./lib/squeak/4.0-2776/squeak
>> linux-gate.so.1 =>  (0xf7766000)
>> libutil.so.1 => /lib/i386-linux-gnu/libutil.so.1 (0xf7744000)
>> libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xf773f000)
>> libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0xf7723000)
>> libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xf76f7000)
>> libnsl.so.1 => /lib/i386-linux-gnu/libnsl.so.1 (0xf76dd000)
>> libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf7533000)
>> /lib/ld-linux.so.2 (0xf7767000)
>>
>> Here's the output of ldd on the machine that isn't working:
>>
>> cmm at ent2:/usr/local/lib/squeak/4.0-2776$ ldd squeak
>> linux-gate.so.1 =>  (0xf7795000)
>> libutil.so.1 => /lib/i386-linux-gnu/libutil.so.1 (0xf7775000)
>> libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0xf7770000)
>> libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0xf7753000)
>> libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0xf770d000)
>> libnsl.so.1 => /lib/i386-linux-gnu/libnsl.so.1 (0xf76f4000)
>> libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0xf7545000)
>> /lib/ld-linux.so.2 (0xf7796000)
>>
>> Looks like those hex-addresses are different, other than that, they
>> look the same.  It's not obvious to me which one is the X11 module..
>>
>>
>>
>> On Tue, Jun 3, 2014 at 11:16 AM, Bert Freudenberg <bert at freudenbergs.de> wrote:
>>>
>>> On 03.06.2014, at 17:51, Chris Muller <asqueaker at gmail.com> wrote:
>>>
>>>> On one machine only, I'm getting an error when I try to start any image:
>>>>
>>>> --------------
>>>> could not find display driver vm-display-X11; either:
>>>> - check that /usr/local/lib/squeak/4.0-2776//vm-display-X11.so exists, or
>>>> - use the '-plugins <path>' option to tell me where it is, or
>>>> - remove DISPLAY from your environment.
>>>> ---------------
>>>>
>>>> Of course, none of those suggestions worked, and I have been running
>>>> Squeak for a long time on this box with no problems.
>>>>
>>>> The same image starts fine on other machines, so I'm guessing
>>>> something has gotten hosed up with my Ubuntu 14.04 installation on
>>>> this one box?
>>>>
>>>> Any suggestions are appreciated.  Thanks!
>>>
>>> Does "ldd" output on the X11 module look right?
>>>
>>> - Bert -
>>>
>>>
>>>
>>>
>>>
>>
>
>
>
>