No screen sharing possible anymore

Hi, i updatet my iMac and my mac mini to Lion. Then i installed Lion Server on the mini.
After doing this, all attemps to connect from my iMac to my mini with screen sharing fail.

Okay, i got it now. There is a difference in activating the remote administration options (in the "Sharing" Pane in the systempreferences). When the option for remote administration is set, it deactivates the option for screen sharing (the computer will tell you that the remote administration controls the screen sharing option). But what exactly happens is not clear. When you diable this feature, and activate the screen sharing, then everything works fine...
Sorry for the my worse english

Similar Messages

Remote Access - Screen Sharing - possible to have a different session?

I was wondering of there was some way, maybe using X11, of doing screen sharing to my iMac but with a different session.
Can I log-in across the network and get a separate logged-in session from the one on the main screen?
If so, how do I do it? Is there a 'How to' somewhere?
I'd imagine something like setting up a Display parameter for X11 that can run remotely on my machine, so I can log on as a different person and run a different session without affecting what's on the main screen. Effectively to be multi-user access.

On a Unix or Linux system (and OS/X is a Unix system) you can have multiple remote sessions running under X11.
Mac OS X does NOT use X11 as its graphic engine. X11 is a side car on Mac OS X, provided so users that need to access Linux/Unix system which do use X11 have a way of displaying X-Windows output.
Mac OS X itself does not use X11 in any way. So even if you could do what you want, it would not get any of the native Mac OS X applications displayed on your system.
As someone else has pointed out, there is a trick with Fast User Switching and the Vine Server that can allow multiple users to access the system. It is a bit of a hack, and less than perfect, but if it works for you, that might be an option.

Screen Sharing - Possible Feature Request

Greetings
Loving Jabber (but also work in an environment that competes with Lync)
Reality:
Staff have deskphones and some with attached headsets.
Some staff have video cameras.
Some have laptops with video.
Very few staff have headsets on their desktop/laptops.
Screen sharing is not available to a user unless used in softphone mode
Staff do not like to have to use softphone just to get a few features such as screen sharing working, then have to have a conference call with the rest of the office since they do not have headsets.
Staff love the video calling if they have a camera (similar to VT Advantage) and they do not have to be in softphone mode for it.
So.........
Is there a way to screen share without being forced to use softphone mode?
I think this might be more a feature request, not sure if there are other ways around it, I cannot find anyhting in product guides or online.
Cheers
Mike

Hi,
BFCP is not designed for the mode CTI control deskphone.
Be confident anyway, Cisco is working on this feature...No idea of release date. Wait and see...
JC

Is it possible for multiple users to use a "generic" account simultaneously without screen sharing?

Hey and thanks for checking out the thread.
I am wondering if it is possible to have users use a generic account at the same time without any sort of screen sharing.
I have set up a generic user account (for example useraccount, password 1234) for users to use in the time before I can set up a custom user name for them. However, I have run into some issues with this.
When multiple users log on using this generic account, their applications seem to be shared on each screen. In the room with multiple Mac workstations, if someone starts working on Photoshop, Photoshop will open on every one elses screen who is logged on under that generic account.
Is it possible for users to log on using a generic network account and have their own isolated work environment or is this sort of sharing a feature? I am new to Mac servers and am not sure.
Thanks for reading the thread.

That shared-account approach seems impractical for the various reasons you've identified, as well as the inevitable issue of cleaning up the detritus that'll inevitably build up in a shared account, and for the lack of accountability for activities occuring under the shared account for both auditing and security, and sharing directories would tend to introduce obscure conflicts around which-file-version-wins file updates when the same file is used in several places, and would probably be contrary to any per-user application software licensing agreements that might be involved.
Put another way, get unique accounts created for folks, and work toward the ability to create accounts for arriving folks, and — if it's applicable here — talk to management about getting any per-user software licensing issues sorted out, whether that's having spare copies purchased and ahead or some advanced notice on accounts, or establishing group software licensing where that's available.
AFAIK, there are tools around which can automate account creation, too. Either generic, a tool such as Passenger, or it's certainly feasible to script the account creation sequence.
Trying this shared-access generic-account approach just looks like it can create more work and more hassles and more effort to me...

Screen sharing over the net. Is it possible.

I was wondering if someone with screen sharing abilities could help out. I was wondering. Is it possible to share screens over the net. For example, my mom is like a 100 miles away. Running Leopard. How could I access her screen so that I could show here what to do. Heres the states, her computer has a router. My computer has a router. How can we sharing screens. Where would be long into and how. I know of the program in System/corservices/screensharing When I click it it asks for host. I dunno if that was the right way to go but any help here would be amazing. Thank oyu.

It is possible apparently, but if there is a router in the equation, that may well cause problems. If your Mom is using a Mac, this screen sharing facility is also available via iChat.

Install Mac OS using Screen Sharing or VNC - is it possible?

I've always wondered how to do this: Is it possible to remote install a Mac OS (in this case Leopard and up) using screen sharing or a vnc connection, when once the remote machine restarts and boots from the installation volume, you know longer have those sharing capabilities?
Essentially I want to know how do you control a remote mac installation without having the ability to activate screen or vnc sharing options?
In our office setting, what I'd like to be able to do is make an image of our installation disc and save it on our server, an remotely install it on other computers in the office.

how would a remote machine be controlled without screen sharing or vnc control if it's booting from a disc or networked volume?
The normal way to mass deploy an upgrade across many macs on a local network is to setup snow leopard server then you create an install image using a copy of a snow leopard disk. You can fully customise the install image with all your 3rd party applications etc. Then you just netboot each mac and the installation is automated.
see Create a Leopard to Snow Leopard Upgrade NetInstall Image
You would setup the server first. then you would have to setup dns correctly, then your users and groups. your sharpoints. Then when you build your image you customise it to suit your new network settings.

Screen sharing, is it possible sound as well?

Hi,
I am looking for a way not only sharing the screen information, but also getting the sound on my remote unit as well. For example music from itunes, or I can watch tv running on the other mac (The Tube), but not get the sound forwarded.
Thanks for any tip.

Sorry but no. ARD does not transfer sound, only the screen. I don't know of any screen-sharing solution for a Mac that transfers audio, though it's possible there's something out there that I've not come across yet.

Screen Sharing does not accept my password anymore

Hi
I have a headless Mac Mini Server running Snow Leopard Server 10.6.8 and a MacBook Pro running Snow Leopard 10.6.8. I detected this morning, that I'm not able to connect from the MacBook Pro to my Mac Mini over Screen Sharing. All other services, mail server, iCal server, Address Book server, file sharing over SMB or AFP even connecting over VNC do work.
- I select the Mac Mini symbol in Finder
- in column view, I select Share Screen...
- in the connection dialog, I add the password (username is already predefined)
- on connect, I get: Authentication failed to "servername". Please verify you have entered the correct name and password.
I use the same username and password with Server Admin, or logging in locally over VNC so I know this is correct.I'm sure I did not change any settings concerning screen sharing (I did some experiments with WebDAV recently)
I'm not sure, when I used Screen Sharing the last time, is there a log on the server for this? Could be, the problem was introduced with 10.6.8, but I'm not sure. From the logs I see, Screen Sharing did work on July, 16th. This would narrow it down to: iTunes 10.4 (not likely), Migration Assistant Update for Mac OS X SL 1.0, and Remote Desktop Client Update 3.5.1.
On the server, I found the following log entries: Jul 21 20:24:33 servername AppleVNCServer[1362]: no such user: user@LKDC:SHA1.xxxxxx: 2
Any help on this problem?

Sorry if that didn't come out right. I should have taken the time to get the correct labels off of the user preferences dialogue and it would have made more sense.
When you create a new user, there are two fields: one for "Full Name" (typically the user's actual name) and another for "Account name" (this usually a more Unix-like user-id). On my system, typing "John Doe" into the Full Name box automatically populates "johndoe" into the Account Name box. I would guess the majority of Mac users will leave that default in there, type in a password and hint and complete creating the account.
Interestingly, you cannot view the Account name in the user preferences dialogue once the account is created. However, the Account name is used as the name of your Home folder.
In the past, I've used that Account name when connecting to shares in finder. I just verified that when you open finder and click "Connect As" and choose "Registered User," the authentication prompt in SL automatically has the Account name in the user field. Once connected in finder, all I had to do is click Screen Sharing and it would just open up. Presumably since I had already authenticated via finder. After the last updates, I started getting a password prompt only when attempting to start screen sharing. Finder still worked the same as before, and I was able to view all my folders. Using the Full Name instead of the Account name got me through the second password prompt and opened the screen sharing session.
I tried authenticating the finder with the Full Name instead, and still got the second authentication prompt when launching screen sharing. Clearly Apple has made a change to screen sharing that no longer passes through your finder authentication.
If you've somehow already been using the Full Name, and not the Account name, to authenticate in finder, this fix doesn't help you.
What I meant by "feeling stupid" is going to great lengths to step through a lot of troublesome reboots and whatnot, only to discover that the problem is an arcane, and apparently pointless change with which user name on the account authenticates for two apparently related features (you do go through finder to get to screen sharing!). I certainly didn't mean you were stupid. I wouldn't blame you for having to figure out something Apple changed up after years for no apparent reason. I wasn't real happy about it either after wasting an hour or so figuring it out. My poor choice of words was really meant in the spirit of that "d'oh!" moment when you find the trivial 5 second fix after spending that hour (or days) doing lots of potentially risky stuff to no avail.

Why doesn't Screen Sharing work across multiple displays anymore in Mavericks?

Hey Guys,
I'm having a problem with Screen Sharing in Mavericks. It wasn't a problem in Mountain Lion, so I'm wondering if you could help me.
I use a Mac Pro with multiple displays to connect to another Mac Pro with multiple displays. Here's how it looks at first:
Two remote desktops shown in one window on one display locally. (Note: there are two different displays connected to this Mac Pro.)
In Mountain Lion, I used to be able to scale this up across displays. When I do that now, the remote desktop scales down to the lower-left corner. Observe:
When I mouse over it, there's some screen tearing (artifacts):
Any ideas?
Notes:
Yes, I've Google'd it.
I don't have Mavericks' multi-display support enabled. I disabled it to spread out Avid Media Composer and Adobe After Effects usage.
Thank you,
Isaac T.

(bump)

Is it possible to use screen sharing between lion and mountain lion

I could always use screen sharing between my 2010 macbook and my 2007 macmini,both with lion.But now since I upgraded the macbook to mountain loin it doesn't work.The macmini did at first show up on the macbook finder sidebar under sharing like it always had done but as soon as I tried to connect the sharing option disappeared and won't come back.The macmini can still see the macbook however,its on the finder there.But when I try to connect from the mini to the macbook I get an error message that says something like "server error" and contact administrator(that's me!)I can't upgrade the mini to mountain lion as it's too old.So it this an incompatibility between the two operating systems or is it something else?
I also tried to do it with BackTo My Mac,enabled through icloud on both computers but no luck,not even showing the Back to my Mac icon on either Finder sidebar like it's supposed to.When I did it through system preferences-icloud,it said this was successfully enabled but it just doesn't work at all.
Cross about this since I always use the macbook to control the macmini which is plugged into a flat screen tv and it's much easier than fiddling around with a mouse and keyboard.

I can screen share my wife's Lion iMac using Mountain Lion and the reverse is true. If the computer is not showing up to be selected under shard on the left column of the finder it is probable a connection issue. I would check my home network, restart the the macs and toggle the sharded settings and energy saving settings like wake for network activity. Be sure and set up iCloud on both your macs and turn on UPnP if you have a router for your home network serving up NAT IP Numbers. UPnG will make the port forwarding enteries in you router to allow you macs to connect behind the firewall created by nat addressing.
I am currently having a problem with back to my mac. S
creen shares great the the Lion iMac but Mountain Lion to Mountain on one computer will not connect if the computer is sleeping. It lights the screen on the sleeping computer but never shows on the computer requesting to share. File share always workd. If I wake the computere before I attemp the connection, screen share work as it should. If I try to screen share while the second computer is sleeping, It will never work again until I restart the iMac.

Video/Screen Sharing via 3G connection not possible - port restrictions?

I'm running Jabber-based iChat AV 5.0.3 sessions from my MBP connected to the Internet via a wireless USB modem 3G/UMTS (German Telekom D1 network). My buddies are connected to the Internet via regular broadband connections (DSL). I have set up a hosted Jabber server via Dreamhost (without SSL, port 5222 used).
Status Quo:
- Contact status of remote Jabber users shows up properly. All buttons (text chat, screen sharing, video) are available (not greyed out) on both sides.
- Text chat works fine.
- Video chat and screen sharing can be invoked from both sides (confirmation window shows up), but after confirmation the initiation process doesn't finish successfully. The video/screen sharing session doesn't run. *iChat AV shows a message indicating that it doesn't receive an answer from the remote user device.* If the iChat session is initiated from a buddy's computer, the buddy gets the same message respectively.
- For testing purposes, I changed the internet connection on my MBP from the mobile 3G USB modem to a regular *DSL broadband connection (same ISP, German Telekom). In this scenario, video/audio calls and screen sharing work flawlessly!* Therefore, I assume that the problems in 3G connection mode is caused by the ISP (German Telekom) blocking/restricting ports required by iChat AV for initiating the video call and streaming the data on their 3G network.
Is there any way to bypass ISP restrictions, by either changing specific iChat AV port settings on both ends (client devices) or by port forwarding? If yes, which settings should I change? Unfortunately, it's couldn't find any document indicating which ports are opened/allowed by German Telekom's 2G/3G (GSM/UMTS) network.
Below is an excerpt of the error message produced by iChat AV:
iChat Connection Log:
2010-11-09 21:18:19 +0100: AVChat started with ID 494414145.
2010-11-09 21:18:19 +0100: [email protected]: State change from AVChatNoState to AVChatStateWaiting.
2010-11-09 21:18:19 +0100: 0x1a8bf8b0: State change from AVChatNoState to AVChatStateInvited.
2010-11-09 21:18:28 +0100: 0x1a8bf8b0: State change from AVChatStateInvited to AVChatStateConnecting.
2010-11-09 21:18:28 +0100: [email protected]: State change from AVChatStateWaiting to AVChatStateConnecting.
2010-11-09 21:18:48 +0100: 0x1a8bf8b0: State change from AVChatStateConnecting to AVChatStateEnded.
2010-11-09 21:18:48 +0100: 0x1a8bf8b0: Error -8 (Did not receive a response from 0x1a8bf8b0.)
2010-11-09 21:18:48 +0100: [email protected]: State change from AVChatStateConnecting to AVChatStateEnded.
2010-11-09 21:18:48 +0100: [email protected]: Error -8 (Did not receive a response from 0x1a8bf8b0.)
Video Conference Error Report:
0.000000 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/DotMacConfiguration.m:1039 type=4 (FFFFFFFF/2)
[HTTP GET failed (0)]
0.000627 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/DotMacConfiguration.m:758 type=4 (FFFFFFFF/0)
[HTTP GET failed (0)]
0.346813 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/DotMacConfiguration.m:758 type=4 (FFFFFFFF/0)
[HTTP GET failed (0)]
1331.086051 @/SourceCache/VideoConference/VideoConference-415.22/SIP/SIP.c:2917 type=4 (900A0015/0)
[SIPConnectIPPort failed]
1333.086142 @/SourceCache/VideoConference/VideoConference-415.22/SIP/SIP.c:2917 type=4 (900A0015/0)
[SIPConnectIPPort failed]
1335.086270 @/SourceCache/VideoConference/VideoConference-415.22/SIP/SIP.c:2917 type=4 (900A0015/0)
[SIPConnectIPPort failed]
1337.086603 @/SourceCache/VideoConference/VideoConference-415.22/SIP/SIP.c:2917 type=4 (900A0015/0)
[SIPConnectIPPort failed]
1339.087985 @/SourceCache/VideoConference/VideoConference-415.22/SIP/SIP.c:2917 type=4 (900A0015/0)
[SIPConnectIPPort failed]
1341.088212 @/SourceCache/VideoConference/VideoConference-415.22/SIP/SIP.c:2917 type=4 (900A0015/0)
[SIPConnectIPPort failed]
1343.088361 @/SourceCache/VideoConference/VideoConference-415.22/SIP/SIP.c:2917 type=4 (900A0015/0)
[SIPConnectIPPort failed]
Video Conference Support Report:
929.446913 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2059 type=2 (00000000/0)
[Connection Data for call id: 1 returns 1
934.996640 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2074 type=2 (00000000/0)
[Prepare Connection With Remote Data - remote VCConnectionData: 1, local VCConnectionData: 1
935.002114 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2266 type=2 (00000000/0)
[Initiate Conference To User: u0 with Remote VCConnectionData: 1 with Local Connection Data: 1 conferenceSettings: 1]
935.467624 @/SourceCache/VideoConference/VideoConference-415.22/SIP/Transport.c:2138 type=1 (00000000/0)
[INVITE sip:user@rip:16402 SIP/2.0
Via: SIP/2.0/UDP lip:16402;branch=z9hG4bK0fdd30e326aa779b
Max-Forwards: 70
To: "u0" <sip:user@rip:16402>
From: "0" <sip:user@lip:16402>;tag=544473054
Call-ID: 9c7ecf46-ec3d-11df-8530-f81eeb5f4012@lip
CSeq: 1 INVITE
Contact: <sip:user@lip:16402>;isfocus
User-Agent: Viceroy 1.4
Content-Type: application/sdp
Content-Length: 708
Video Conference User Report:
928.427249 @:0 type=5 (00000000/16402)
[Local SIP port]
934.996832 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2171 type=5 (00000000/0)
*[Remote Router]*
*[PORT RESTRICTED]*
934.996842 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2173 type=5 (00000000/0)
[Remote CommNAT Result: 0x000000d0
936.003962 @:0 type=5 (00000000/60)
[Detected bandwidth (kbits/s): 2627 up, 2627 down. (00000000)
936.033015 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VideoConferenceMultiController.m:2423 type=5 (00000000/0)
[Start Conference With UserID: u0]
978.787787 @:0 type=5 (00000000/16402)
[Local SIP port]
1014.011790 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2171 type=5 (00000000/0)
[Remote Router]
[PORT RESTRICTED]
1014.011800 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2173 type=5 (00000000/0)
[Remote CommNAT Result: 0x000000d0
1015.024555 @:0 type=5 (00000000/60)
[Detected bandwidth (kbits/s): 2627 up, 2627 down. (00000000)
1015.031800 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VideoConferenceMultiController.m:2423 type=5 (00000000/0)
[Start Conference With UserID: u0]
1323.083386 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2171 type=5 (00000000/0)
[Remote Router]
[PORT RESTRICTED]
1323.083396 @/SourceCache/VideoConference/VideoConference-415.22/Video Conference/VCInitiateConference.m:2173 type=5 (00000000/0)
[Remote CommNAT Result: 0x000000d0
(…)

Hi,
Does this 3G device have any set up functions that are on your Mac ?
If it does not it is likely that it is wide open to all Port (65535 of them).
I presume that in System Preferences > Network you see a Public IP when using this device ?
Again this would tend to pint to all the ports being open.
Is there anything on the ISP's web site that suggests this device is unsuitable to be used with VoIP or SIP connections ?
VoIP (Voice over the Internet) uses the SIP connection process the way iChat does.
Most likely the issues is the way packets are sent.
When you do a download, for instance, do you find the speed increases in the first few minutes ?
When some data packets are sent over the Internet the next one is not sent until confirmation that the first has arrived.
This Latency effects Point to Point WiFi (antenna to Dish on House) and satellite connections mostly particularly when it is a two way thing.
It can effect Mobile/Cell phone type connections.
What sort of Speeds are you getting on the 3G device ?
http://www.speedtest.net/
Do these seem to get faster as the time proceeds ? (this can be difficult to spot).
The Log mentions one end being at just over 2Gbps although it does not make it clear which end.
As the Remote end is the end that reports "Router: Port Restricted" and it works over standard DSL we have to presume they have the ports open.
You could try restricting iChat 's Bandwidth in iChat menu > Preferences > Video Section to 500kbps (try it at both ends)
If that does not work try 200kbps
This may stop iChat from trying to send data too Fast for the Network Connections.
Realistically there are a few too many variables here.
It could be Speed of data throughout at the Initiation point. (Slow Start up of data transfer)
It could be an Internal setting preventing SIP.
It could be that the 3G network sends and receives data by different routes.
(I have seen this once when a ISP was repairing some Cabling. To maintain end user speeds they managed their own network to split Incoming and outgoing data to the end point.)
iChat does not like this as it checks the IPs and the Hops (number of intermediate stages/servers) and if the data is different it will not connect (Man in the Middle attack protection).
I can't remember the last time I knew of someone being successful with either an 3G USB dongle or a 3G phone as Modem (internet Sharing).
Despite my ideas I think you will be unlucky and this will not work.
10:31 PM Saturday; November 13, 2010
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"

Can't access iTunes and Screen Sharing sharing services on my mac Mini

Since several weeks now I face a networking issue of the stranger kind.
Currently I've got my Mac mini acting as the central server for music, photos and files in my home. Central Network Mgmt device is a Wireless Lan router.
In the past I was accessing the Mac Mini from my MacBook via Screen Sharing this doesn't work anymore. When requesting the service the connection effort just runs idle. In iTunes on my MacBook I can see the Libary of my Mac Mini iTunes but clicking on it brings the rotateing ball and after a certain while the message that the iTunes Libary is not responding and that I should check my Firewall settings. Which I did on both computers and they are wide open. 'Ipfw show' in Terminal brings back the message 'Open for any to any communication' also on both computers.
Makeing use of the File sharing service from the MacBook to the MacMini works but it takes a extreme long while until the shared folder appears on the MacBook.
Trying to access from the Mac Mini my MacBook for all these services is no problem.
One more thing is that my Mac Mini cannot access the Wireless Lan router anymore thru the Web Browser or thru a Ping. Here I get the message 'Ping Send to: permission denied'. I changed the Router still the same message. Internet traffic is only possible after I manually applied a DNS Server with its IP number.
Anyone out there who could help? I'm close to completely reinstall my Mac Mini but would naturally love to avoid this.

wireduck,
Highlight the music folder and on the keyboard type (Command) + i: on the window that opens scroll down if need and click on the lock on the bottom right. Type in an Admin User name and password. Then under the (Sharing & Permissions:) make sure the users you want to open the folder are listed and that there (Privilege) is set to @ least Read. If not hit the ( + ) sign and add them. After you have that all set up click on the little gear next to the ( - )s sign and (Apply to a enclosed items). that way each user can read the files. After that the little ( - ) sign should be gone on the folders.
Hope that helps.

Is there a way to switch to single-user mode for screen sharing in Lion?

Hello,
with the new multiple user mode one screen sharing guest can not see the mouse cursor of another - even if they use the same login.
It's a pity, because we use screensharing to discuss the content of the screens with multiple screen sharing users.
It is necessary to point with the cursor to show the other members of this 'screen sharing meeting' things while discussing.
This is not possible anymore with Lion and multi user screen sharing.
Does anybody know a patch or terminal command to switch back to single user mode for screen sharing?
Kind regards
Carl M.

Try using OmniDazzle to help draw attention to what you want:
http://www.omnigroup.com/products/omnidazzle/

Screen sharing, audio is one-way only.

I have suddenly lost the ability to hear the other person when screen sharing. I screen share my father's computer all the time to help him with general computer issues. I have never had a problem with audio. I can always hear him, and he can always hear me.
Suddenly, this is not working anymore. He can hear me but I cannot hear him. This occurred in the middle of a screen sharing session. We were talking to each other and then suddenly he could not hear me anymore.
What's more puzzling is that I connect to my brother's computer in the exact same way and I do not have a problem with him. Audio is two-way.
I checked my father's audio settings and he doesn't appear to have muted his mic or disabled audio. My audio output is fine. I can hear system sounds, iTunes music, etc…
Could he have pressed a function key or done something without knowing and disabled his mic?
Thoughts?

Hi,
Possibles (but not likely).
1) In System Preferences > Sound > Input he turned the volume down or changed the Mic selection.
2) In iChat > Preferences > Video section he changed the Mic selected.
3) In iChat Video Menu he "turned Off"/Disabled the Microphone Enabled item (He would have to be seeing his own Screen and have control of the Mouse)
4) Similar for the "Show Audio potion in the View Menu.
NONE (2, 3 and 4) of these have keystrokes set up in iChat or the System (1).
I am unaware if you leave an Audio or Video chat window open after the call was ended at the far end that the Mic Mute button still works. I could see that he may have such a window on his Desktop but don't see this as a working option.
Most Audio drop outs occur in Video chats and it is Internet Speed/bandwidth related (with a fair amount of Processor ability)
If the bandwidth is low (Lower that 256kbps and closer to 100kbps) then if the Frame rate is over 15fps then that computer may not be able to process the Audio as well as the Video pics and will drop the Audio.
Audio Only chats come in around 48-50kbps (top end dial-up) in 1-1 chats.
Screen Sharing at about the 120-150kbps mark (depending on how large the "Display is at the sending end)
This means if he dropped the Bandwidth Setting in iChat > Preferences > Video Section > Bandwidth Limit drop down the Bit rate from his end may have dropped (slowly/Buffered) to a point where Audio failed to be sent.
The reverse would also be true if you dropped your Bandwidth to try and "Smooth out" the movement of the mouse/pointer.
For both of these last two things try iChat with the Connection Doctor (Video Menu Open. (You are likely to need to switch back and forth between your Screen and his).
I cannot think of anything that is "less intentional" like hitting the Space Bar or other keystroke or such.
8:24 PM Saturday; March 19, 2011
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Can connect with Server Admin and Server Prefs, not Screen Sharing or ARD

Just set up 10.5 server on my G5, and trying to connect from 10.5 on my iMac. I have tried both with the server System Preferences set to allow Screen Sharing via VNC, and with Remote Management enabled for ARD. In both cases, I get authentication errors when trying to connect from home. I have tried with both the full username, and with the short name of the only account on the server. My assumption is that, since this is the administrator account, I don't need to setup explicit privs for it on the server.
I can authenticate without any trouble with both Server Admin and Server Preferences.
The Firewall is not enabled on either machine, although I am behind a NAT router at home -- is it necessary to open any special ports to enable screen sharing? Is it possible that having these ports closed would produce an authentication error?
Thanks for any help.

Hi
I'm going to assume you configured your Server in Standard Configuration and not Workgroup or Advanced?
When using Standard in setting up the server DNS is automatically configured for as well as the Server taking an Open Directory Master Role. The admin account created at the beginning is for administering the Open Directory. Unknown to you and not documented at all - as far as I can see - is the 'Local Administrator' (localadmin) account.
You only become aware of this account if for some reason you have a problem with the Server which involves demoting to Standalone (ie not an Open Directory Master) once this happens you find you can't log on to the Server anymore or communicate with any of the Server applications because it won't accept any username or password other than root and localadmin for the name and the password defined for the original admin account you created right at the beginning.
Sometimes it does not even take demotion to find yourself locked out of the Server. Some have experienced this problem when running the Security Update or when some other problem has occured.
Part of the process of creating an Open Directory Master involves the creation of a 'special' directory administrator account. This account is used for administering the LDAP node. If demotion takes place this account gets blown away along with all users and group accounts that exist in the LDAP node, in fact everything to do with Open Directory is destroyed apart from Users' home folders.
Why demote if this happens? Sometimes the LDAP database gets damaged/corrupted beyond a point where normal troubleshooting methods fail. This can happen for a whole variety of reasons but more often than not is due to a poorly configured DNS Service. You basically only have two options once you reach that stage. A server reinstall involving a format and rebuild or a demotion to Standalone. Which option would you choose? Prior to demotion you can (if you have the chance) export users and groups or even archive the LDAP database itself for restoration later on. This is a useful option as everything to do with the LDAP Server is retained - passwords, users, groups etc. The other method of saving users etc does not retain passwords.
As time goes on and you become more familiar with your server you will find more and more of this information out for yourself. Hopefully the simple advice I've given helps you understand Open Directory a little better.
Hope this helps, Tony

No screen sharing possible anymore

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