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• When I plug an HDMI cable into my MacBook Pro with Retina Display, the resolution of the retina display changes

  - by Tyler Crompton

  I had an HDMI cable plugged in for a while that connected to a TV with no power. The retina display randomly flashed blue after a while and then changed to a different resolution (possibly 1080p). I unplugged the HDMI cable and nothing happened. So I restarted the computer to no avail. I was still having issues. So I fiddle with some settings after plugging in the HDMI cable again. Now, the retina display appears fine when no HDMI cable is plugged in, but when there is one plugged in, the resolution changes. I have mirroring turned off (which is what I want). The resolution of the retina display when an HDMI cable is plugged in is 3,360px x 2,100px (according to the size of a screenshot) and the external display is 1,600px is 900px. How can I fix the retina display to show with the correct resolution.

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• NFS of NAS server blocks in cluster environment

  - by Zardoz

  In our department we have an Iomega NAS (px4-300d) connected to a Supermicro cluster with 5 nodes (12 cores per node). Each node mounts a share on that NAS by using NFS. Unfortunately after some time (several minutes) of permanent read/write operations (from all nodes) the NAS starts to block and a bit later freezes completely. We tried several options of the mount command, but nothing helped (async, intr, wsize, rsize). The NAS itself doesn't allow many options (better to say none). Do you have any recommendation how to integrate a NAS using NFS in a cluster environment?

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• Cannot umount device is busy

  - by user132199

  Situation I am running a RHEL server via a VM on my laptop. I have a win7 desktop sharing out a folder and the VM on my laptop running RHEL6 has a CIFS windows mount at \mnt\win When I go to unmount the device I get a device is busy message. So I went to my laptop and check to see if there were any users connected to the share, since it listed none I turned off sharing. I went back to my RHEL instance and attempted another umount \mnt\win but received the same error. Question What are other alternatives to unmounting a shared drive?

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• postfix smtps issue

  - by DavidC

  Im currently experiencing the following issue with postfix over ssl (smtps) Apr 7 13:43:55 server88-208-248-147 postfix/smtpd[5777]: connect from xxxxxxxxxxxxxxx[xxx.xxx.xxx.xxx] Apr 7 13:45:09 server88-208-248-147 postfix/smtpd[5777]: lost connection after UNKNOWN from xxxxxxxxxxxxxxx[xxx.xxx.xxx.xxx] Apr 7 13:45:09 server88-208-248-147 postfix/smtpd[5777]: disconnect from xxxxxxxxxxxxxxx[xxx.xxx.xxx.xxx] my main.cf is as follows: smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_use_tls = yes smtp_use_tls = yes smtpd_tls_auth_only = no smtpd_tls_CAfile = /etc/postfix/caroot.crt smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_tls_loglevel = 1 when accessing smtp and running start tls i get the following: # telnet xxxxxxxxxxxxxxx 25 Trying xxxxxxxxxxxxxxx... Connected to xxxxxxxxxxxxxxx . Escape character is '^]'. 220 xxxxxxxxxxxxxxx ESMTP Postfix ehlo localhost 250-xxxxxxxxxxxxxxx 250-PIPELINING 250-SIZE 10240000 250-VRFY 250-ETRN 250-STARTTLS 250-AUTH PLAIN LOGIN 250-AUTH=PLAIN LOGIN 250-ENHANCEDSTATUSCODES 250-8BITMIME 250 DSN STARTTLS 220 2.0.0 Ready to start TLS please help as i'm lost of places to look now. os is Ubuntu 10.4 and the SSL is a wildcard SSL, imap/pop and apache work flawlessly with the same certificate.

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• Mac OSX DHCP Stopped Working [on hold]

  - by Jesse James Richard

  Tethering a Raspberry PI to a MacBook (Mavericks) via ethernet is proving to be a real pain. This worked for about a day. My MacBook required a rare reboot and once it came back up the Pi won't get an address. I've confirmed it's not a problem with the Pi. It's a problem with the MacBook for sure. It's basically just stopped giving out IPs. I've read as much as I've found about how to fix this friggin' problem, but I've thus far come up blank. Internet sharing Wi-fi Ethernet enabled, and/or Edited /etc/bootpd.plist as described here (http://www.jacquesf.com/2011/04/mac-os-x-dhcp-server/ - this worked initially and now no longer does) Pi connected directly to the router has no problems. My MacBook DHCP server will no longer give out addresses. Any help would be much appreciated.

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• Set up an Email server on intranet without domain

  - by Devdatta Tengshe

  I work in a small office with about 35 people and we are all on a intranet. This network is not connected to the internet. Is it possible to set up an email server, with which we could send emails to each other? (We don't need to send emails outside our network.) I cannot use a messenger service like Openfire, since the messages could be asynchronous, and we'd like to get those emails in a email client like Thunderbird. Another obstacle we have is that we do not have a domain name. Any ideas on which free (as in beer) software could be used? We have both Windows and Linux machines.

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• Wireless slow, but very odd

  - by Logman

  I have a HP Pavilion dv6 laptop, internet through the wireless timeouts. Even though it connects fine to the AP/router. The computer had a virus (searchnu?) and I backed up the usual and restored the laptop to factory image. Problem is after the restore the internet through the wireless the same still... and connected via wired and everything worked fine. I was able to update the whole system. Internet worked perfect, speed great. But the wireless still was pitiful. Ping tests with wireless are interesting: Google= 18ms Gmail= 18ms Yahoo= 1023ms 8.8.8.8=30ms Microsoft= Request Timed Out Bing= Request Timed Out msn= Request Timed Out even though I get 18ms with google, the pages take a long time to load. Is this a root kit? is it the wireless card in the laptop?

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• Options not available anymore in my Samsung 932bw lcd

  - by Sávio Mendes

  I think a friend messed up something in my monitor. I left him playing a game and when i came back, i noticed that the brightness was very high. I tried to change it but i couldn't, brithness, contrast, color warm and a few other options are marked as "not available" (he probably adjusted the brightness and changed something else too, that it's causing this thing). I updated the monitor driver, the vcard driver, plugged the monitor in other pc (I'm connected through dvi, but in the other pc i plugged through rgb) but nothing fixed it. Is there someway to force reset all the options or something like that to fix this? (I'm running Win7 RC1 but I don't think that it has something to do with it, it was working perfectly until he messed it up, and the other pc where I plugged it, runs winxp and the problem occurs too. And it doens't look like a the monitor is broken, it works like it always did, just these options are marked "not available" now...)

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• Temporarily remove Group Policy in Windows 7

  - by rodey

  Using Windows 7 Professional I need to get access to the Folder Options screen. At work we primarily use Windows XP and are connected to a domain. Through Group Policy we disable access to the Folder Options. We use a tool called KillPol that temporarily removes Group Policy and let's me access the screen. This tool doesn't work on Windows 7 and I can't find a replacement. Any ideas on how I can get access to the Folder Options screen in Windows 7 when it is disabled through GP?

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• Issues connecting to a pix 501 via console cable

  - by Bourne

  Have a pix 501 that was set up to do filtering and I was working on setting the vpn up when I lost ssh connectivity. Looking at the front, all 4 lan lights blink intensely green but in a very repetitive pattern. The funny thing is there are only 3 devices connected to the 4 ports so that's the first element that doesn't look right to me. Console cable light doesn't turn on when cable is plugged in and have tried rebooting it many many times to see the bootup sequence with no result. Also, I cannot connect to it via pdm or console but the traffic is permitted through. Are there any additional troubleshooting steps I could do or should I count it as dead? Thank you.

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• Can't see a Windows XP computer on the network

  - by user56614

  I have two PC's connected to the same router. One is running Vista Home Premium and the other is running XP Pro. I'm trying to reach the shares of second PC from the first PC. I've enabled file sharing on the XP PC, I've disabled firewall and defender, and I can successfully ping it from the Vista PC. Both computers are set to the same workgroup "WORKGROUP". However, if I try to type "\\192.168.1.2" in Windows Explorer (192.168.1.2 being the IP address of the XP PC), I get a message: "Windows can't access \\192.168.1.2... Error code: 0x80004005 Unspecified error". And If I type "net view \\192.168.1.2" in command prompt, I get "System error 53 has occurred. The network path was not found." Am I missing something trivial?

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• Having internet on a VirtualBox

  - by S4M

  I am running a linux laptop and I set up a VirtualBox under windows XP. My only problem is the VirtualBox doesn't seem to be connected to internet - When I do the connection diagnosis it tells me there is no connection. I am using an NAT adapter, and I bind the port 80 from my computer to the port 80 of the VirtualBox, and same for the ports 8080, but still no result. I would be grateful is someone could help me to sort this out. EDIT: thinking of it, what is making the problem hard - and painful - is the absence of error message. If I try to use a given adapter to share my computer's connection with the VirtualBox, and it doesn't work, I have no way to know why. So, it would be really helpful if someone could share a way to access this king of information (is there a log file somewhere or a way to run VirtualBox from command line in a verbose mode?).

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• Mounting share over VPN

  - by user1337

  I have a CentOS 5 web server which currently mounts a NFS export on my Mac OS X 10.7 laptop. It works great, except over VPN I can't get it to mount at all. I tried SMBUp but haven't been able to get it working even locally. It doesn't look like there's an easy way to install netatalk for CentOS 5. Even still, I'm not sure if that's the best way to do it. I tried using a GUI SSH client that can "mount a FTP disk" and it would work, except the files require root access and there's no external root access and the client can't elevate permissions. The basic thing I need to do is have the server be able to read the files off of my laptop, connected via VPN. The files are frequently updated (every 5-20 seconds) so I don't want to manually do that via SSH. Which protocol can work with both platforms and easily handle the latency introduced by VPN (and potentially mobile broadband)? Thanks

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• Routing traffic to a specific NIC in Windows

  - by Stoicpoet

  I added a 10GB NIC to a SQL server which is connected over to a backend storage using ISCSI. I would like to force traffic going to a certain IP address/host to use the 10gb NIC, while all other traffic should continue to use the 1GB NIC. The 10gb nic is configured using a private network. So far I have added a entry in the host file to the host I want to go over the private network and when I ping the host, it does return the private IP, but I'm still finding traffic going to the 1gb pipe. How can I force all traffic to this host to use the 10gb interface? Would the best approach be a static route? 160.205.2.3 is the IP to the 1gb host, I actually want to the traffic to route over an interface assigned 172.31.3.2, which is also defined as Interface 22. That said, would this work? route add 160.205.2.3 mask 255.255.255.255 172.31.3.2 if 22

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• Can't burn 8.1G iso onto 8.4GB DVD - "Media does not have enough free space"

  - by Max Williams

  I'm trying to burn a dvd on a mac with an external (firewire-connected) dvd drive. I'm checking the size of the iso thus: DVD-4:dvd_files macbook$ ls -l /tmp/hybrid.iso -rw-r--r-- 1 macbook wheel 8700884992 Aug 22 10:57 /tmp/hybrid.iso DVD-4:dvd_files macbook$ ls -lh /tmp/hybrid.iso -rw-r--r-- 1 macbook wheel 8.1G Aug 22 10:57 /tmp/hybrid.iso The "human-readable" size is 8.1 Gig but when i try to burn, onto an 8.4G dual-layer dvd, it says "Media does not have enough free space" The definition of a "Gigabyte" according to Wikipedia is 1 billion bytes, so the iso size should actually be 8.7 Gig according to this definition, in which case the disk definitely isn't big enough, and it's just that the -h option to ls is misleading. Is the discrepancy just due to the ls command using a different definition of "G" (eg 1024 Meg aka 1.07 Gig? This comes out as 8.103 which fits what ls is displaying)

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• IP not detected in terremark enteprise cloud server - how to install VMware on instance?

  - by JohnMerlino

  Using terremark enteprise cloud, when you create a server, you assigned an IP address to them and that IP is visible under Detected IP when selecting the server. However, I created a server, with IP address and I created an internet service and connected it with a node. I used protocol TCP and mapped it to port 3001. But I notice when I select my server, the IP address doesnt dsplay under Detected IP and then I VPN Connect, launch terminal and try to SSH with the IP to my server, and I get connection timed out. I presume the reason lies in that the IP address is not being detected. Someone suggested that my VMware-Tools is out of date and in fact on the server instance for VMware-Tools it does say "out of date". I'm not sure how to mount the instance and install VMware-Tools. I am using Mac OSX. Someone said that it will only work on PC running IE.

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• Configuring Windows Server Backup Destination Drive Sets

  - by Nicholas

  Is it possible to set up the standard backup system in SBS 2011 (or Server 2008 R2) to use an internal drive as a destination as well as external drives? Before you say yes, from my tests and from what I've read on the web, backups with internal drives included as a destination always seems to prefer the internal drive over connected external ones. (Regardless of what drive might be marked as 'active'). So no data ever gets written to a plugged in external drive. In my opinion external drives should always have priority over internal drives or including them is pointless.

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• Windows XP 32-bit + RocketRaid 622 + 4 x 3TB = not quite a RAID setup

  - by gmoney

  I'm looking to make a 6TB RAID 10 array from my new pile of drives under Windows XP 32-bit, however they are only for auxiliary storage. After adding all the drives to an array, and initializing them XP sees only a fraction of the storage, 2TB. I'm assuming this has to do with MBR vs GPT. Is making a series of 2TB volumes and then spanning my only solution? Most questions online have to do with booting from this setup, but I'm just using them as extra storage. Hardware: 4 x 3TB Hitachi Deskstars + RocketRaid 622 + Sans Digital TR8M TowerRAID. The array is connected via eSATA.

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• If I let Google handle my emails for my domain, my Wordpress site won't send out emails anymore

  - by Fulvio

  Since I decided to let Google handle all my emails for my domain, while the domain is hosted on a 3rd party server, emails send out by a Wordpress installation no longer work. My supposition is that since all email is being routed to Google, my specific account on that server for that domain is unable to send out emails. I definitely wish to keep using google services for handling my emails since it comes with all the advantages connected to a Google account. However I need my Wordpress installation to send out administrative emails. I run my server with CPanel. How to configure that specific account and/or Wordpress to keep it able to send out emails? I don't need people to answer these emails sent out from server (eventually I might set a reply-to-address perhaps) thanks

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• solaris + why cant ping to default getway

  - by yael

  I have Solaris machine with IP 10.10.10.100 and default getway 10.10.10.1 and subnet 255.255.255.0 remark - solaris machine connected to cisco switch via cross cable and from switch to my laptop I configure my laptop to connect to my Solaris machine so my laptop IP is 10.10.10.1 and subnet 255.255.255.0 but something not clearly I have ssh connection from my laptop to my Solaris machine ( I mean I in my solaris machine ) but from Solaris machine I can do ping to 10.10.10.1 ? ( how it can be ??? ) please advice why?

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• Windows 7 Intermittent Connection Issues (Continuously "identifying")

  - by andrewktmeikle

  I have an issue solely with my desktop windows 7 machine on my network (the network has multiple different devices, on the same and different operating systems) and the issue is that irregularly, although sometimes frequently, I briefly get disconnected from the internet (briefly is for around 5-10 seconds). However, I never loose the bars on the wifi thing, eg I don't get the yellow triangle, but it goes to the identifying stage and then reconnects. The reason I noticed the problem was when I was streaming music it would stop and I would refresh the page and it would start working again ( turned out it was because it took that amount of time to get connected again). So my question is, what would cause the intermittent issues and start the "identifying" process again. I don't think its my router, because no one else is having problems, so the other option is that its a problem specifically with my machine. I'm connecting to a Netgear DG834GT router, and I'm using a Edimax Wireless-N150 USB Adapter. Anyone have any ideas?

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• Starting scheduled task by detecting connection of USB drive

  - by gemisigo

  I know it has been discussed before several times that it is not possible to start an application from an usb drive when connecting it due to limitations of autorun (or autoplay??) in Win 7. But it is possible to create a scheduled task having On an event type trigger and surely there must be an event occurring when the drive is connected. Does anybody have the slightest idea which Event ID should I use? Or at least what type of event? There are too many logs to pick from.

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• EC2 custom topology

  - by Methos

  Is there any way to create a desired topology of EC2 instances? For example, can I create a 3 node topology of nodes A, B, C where C gets the public IP address and B and A are connected to it. Something like: Internet <-- C <-- B <-- A B and A only get private IP addresses and there is no way for the traffic to reach A before hitting B and C. This means I can install whatever I want to install on C and B to filter, cache etc. I'm going through EC2 documentation but so far I have not seen anything that talks about it. I will really appreciate if anyone knows how to do this on EC2

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• When to use MySQL replication or DRBD for HA on Xen VM?

  - by user62513

  I'm setting up a database which needs to be needs to provide High Availabilty. My primary concern is high performance and robustness (I don't want something that will fail fast and badly). The database is accessed by the application at an average of 300 qps. It's will run on Xen VMs and it has some InnoDB tables as well as MyISAM tables. The VMs are connected via ethernet 100Mbit/s ethernet cables. Which of the two - MySQL replication or DRBD - would you recommend in such a situation? Or should I use DRBD to make the master database Highly Available and use MySQL replication on the slaves? I'm a developer so these things are all not so easy for me to make a sound judgement.

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• Windows 7, how to get unlock (Press Ctrl+Alt+del) prompt on all monitors?

  - by Zugwalt

  I have a laptop that I keep shut in a docking station as I have two screens connected to the laptop and it cannot display to both of those AND its own screen. However, when my computer locks by itself (Not when I lock it using Ctrl+Alt+Del) the login prompt is ONLY on it screen (at least its there when I open it up) and my primary external monitor is off and my other one is all black. This means to log in I have to hit Ctrl+Alt+Del and blindly enter my password--which I don't mind too much, but would prefer if I could actually see the unlock/login prompt instead of typing on a black screen. Any way to have it show the login prompt on all monitors?

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