running a headless mini doing openGL

Feb 9, 2007 at 1:39am

running a headless mini doing openGL

so another day, another weird situation. testing out an installation
on 8 mac minis, but i don’t have an 8 port KVM. i’m using remote
desktop to monitor them. os x is booting fine, but the problem is
that max is crashing and freezing on the headless machines in weird,
inconsistent ways.

we’ve spec’d out an 8 port KVM solution and it’s $599. will i have
decent luck with a DVI or VGA terminator stuck on the monitor port,
or am i going to have to bite the bullet and get the KVM?

newest os x, newest quicktime, newest max, newest jitter, 1.67ghz
intel mac minis. a GRILLION of them.

#30200
Feb 9, 2007 at 3:52am

I think you might be able to put a DVI->VGA converter and have it
workout although I’m not positive. The way these things tend to work
is by checking resistance on the port pins, so you could probably even
take a 240 ohm resistor and have it work. Surely you have a DVI-vga
converter lying around. Give it a shot. It might save you the kvm
bucks. I would test it out myself, but I don’t have anything I can
run headless unless I decapitate my laptop or imac.

wes

#96003
Feb 9, 2007 at 3:56am

On Feb 8, 2007, at 5:39 PM, joshua goldberg wrote:

> so another day, another weird situation. testing out an
> installation on 8 mac minis, but i don’t have an 8 port KVM. i’m
> using remote desktop to monitor them. os x is booting fine, but
> the problem is that max is crashing and freezing on the headless
> machines in weird, inconsistent ways.
>
> we’ve spec’d out an 8 port KVM solution and it’s $599. will i have
> decent luck with a DVI or VGA terminator stuck on the monitor port,
> or am i going to have to bite the bullet and get the KVM?

I would say try the cheap VGA terminator hack if possible first.
There was a user report about headless mini’s OpenGL running really
slowly but not crashing. Conceivably, this might lead to scheduler or
queue backlog and hence freezing or crashing in your patch if it is
not designed to take such low frame rates into account.

Try searching forums and other online resources for more info. I
don’t believe it’s specifically a Jitter problem.

-Joshua

#96004
Feb 9, 2007 at 4:02am

nah, all of the machines already have the dvi-vga dongles sitting on
them. still no love.

kvm, here we come.

On Feb 8, 2007, at 10:52 PM, Wesley Smith wrote:

> I think you might be able to put a DVI->VGA converter and have it
> workout although I’m not positive. The way these things tend to work
> is by checking resistance on the port pins, so you could probably even
> take a 240 ohm resistor and have it work. Surely you have a DVI-vga
> converter lying around. Give it a shot. It might save you the kvm
> bucks. I would test it out myself, but I don’t have anything I can
> run headless unless I decapitate my laptop or imac.
>
> wes
>

#96005
Feb 9, 2007 at 4:02am

you can proably get away with plugging an vga/dvi in and out of all
the minis. i’ve used them headless on a number of occassions (with
ARD), no problem. though there was always a monitor there initially.

>
> On Feb 8, 2007, at 5:39 PM, joshua goldberg wrote:
>
> > so another day, another weird situation. testing out an
> > installation on 8 mac minis, but i don’t have an 8 port KVM. i’m
> > using remote desktop to monitor them. os x is booting fine, but
> > the problem is that max is crashing and freezing on the headless
> > machines in weird, inconsistent ways.
> >

#96006
Feb 9, 2007 at 5:50am

On Feb 8, 2007, at 8:02 PM, joshua goldberg wrote:
> nah, all of the machines already have the dvi-vga dongles sitting
> on them. still no love.
> kvm, here we come.

Check out the adapters this thread which I alluded to in my last
post. Found in a forum search on “headless”.

http://www.cycling74.com/forums/index.php?t=msg&goto=87171

-Joshua

#96007
Feb 9, 2007 at 6:08am

awesome, this is great, i’ll do some soldering tomorrow to make a
tvtool.

On Feb 9, 2007, at 12:50 AM, Joshua Kit Clayton wrote:

>
> On Feb 8, 2007, at 8:02 PM, joshua goldberg wrote:
>> nah, all of the machines already have the dvi-vga dongles sitting
>> on them. still no love.
>> kvm, here we come.
>
> Check out the adapters this thread which I alluded to in my last
> post. Found in a forum search on “headless”.
>
> http://www.cycling74.com/forums/index.php?t=msg&goto=87171
>
> -Joshua
>
>

#96008
Feb 9, 2007 at 10:19am

I have 4 port switch (don’t know which one – it’s vga and usb) with 4
mac minis. The problem is you still have to select each mac (on kvm)
as it starts up. if you don’t, mini will behave the same as without
switch. i don’t know if 8 port switch has termination built in, but 4
port one for sure doesn’t.

i woud try to get the termination stuff working.

other suggestion might be using dvi to video adapter, and putting
75ohm resistor in a chinch jack. might be easier/safer to mess around
than vga or dvi.

klif

p.s. do you start the mac minis manually (as i do) or you managed to
do it over network/usb somehow??

#96009
Feb 14, 2007 at 7:49am

Hello Joshua,
did the tool work for you?
-jennek

On 9-feb-2007, at 7:08, joshua goldberg wrote:

> awesome, this is great, i’ll do some soldering tomorrow to make a
> tvtool.
>
> On Feb 9, 2007, at 12:50 AM, Joshua Kit Clayton wrote:
>
>>
>> On Feb 8, 2007, at 8:02 PM, joshua goldberg wrote:
>>> nah, all of the machines already have the dvi-vga dongles sitting
>>> on them. still no love.
>>> kvm, here we come.
>>
>> Check out the adapters this thread which I alluded to in my last
>> post. Found in a forum search on “headless”.
>>
>> http://www.cycling74.com/forums/index.php?t=msg&goto=87171
>>
>> -Joshua
>>
>>
>
>

#96010

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