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• Sound entirely stopped working on Windows 8 on a Macbook Pro

  - by Kelvin Bongers

  I am currently running Windows 8 (downloaded from DreamSpark) on a Macbook Pro. This worked fine for a while but suddenly all audio stopped working. When I go to "Playback devices" and hit "Test" on the speakers I get treated with the following message: This also shows up right after I try restarting. I tried disallowing exclusive usage of the devices but it makes no difference. Edit: After some looking around I tried changing the sample rate and bit depth so I would get a dialog screen to force Windows to go around the program that's using it. I did get the dialog but then instead of changing it I got the following error: Edit 2: I narrowed it down to a single service failing to start, the Multimedia Class Scheduler service fails to start with the following error:

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• Eclipse: would more CPU cores with HyperThreading help increase speed?

  - by Dylan

  I'm programming a very large project in Eclipse. Right now I use a dual core machine with 2GB RAM, but Eclipse is sometimes busy for minutes (refreshing/indexing/building), so I'm upgrading to a new machine (with 16GB RAM and an SSD). Now I must choose between an Intel 2500K or an Intel 2600K that has HyperThreading. The price difference is about $100. Would that be worth it, for Eclipse, or is more memory/faster drive much more important for Eclipse ? Can Eclipse make use of the HyperThreading at all?

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• Why does explorer restart automatically when I kill it with Process.Kill?

  - by Thomas Levesque

  If I kill explorer.exe like this: private static void KillExplorer() { var processes = Process.GetProcessesByName("explorer"); Console.Write("Killing Explorer... "); foreach (var process in processes) { process.Kill(); process.WaitForExit(); } Console.WriteLine("Done"); } It restarts immediately. But if I use taskkill /F /IM explorer.exe, or kill it from the task manager, it doesn't restart. Why is that? What's the difference? How can I close explorer.exe from code without restarting it? Sure, I could call taskkill from my code, but I was hoping for a cleaner solution...

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• How to set up Windows server 2008 to receive email?

  - by Saul

  First off apologies, I'm from a medical background not a networking one, but I've got roped into setting up a windows 2008 server. So far web server running, fixed IP address assigned (within a large private network of the National Health Service in the UK if that makes any difference) and the network team have assigned a DNS entry for me which works, so the server can be addressed as nww.myserver.nhs.uk I've only got ports open on the router for 80 and 443 (http and https) at the moment, so presume I need a different port to enable email services. My need is to be able to accept an email to the domain name like [email protected] in order to pick up a confirmation mail from an SSL issuer (Comodo) I guess to confirm that I control the domain. After that I don't actually need mail services on the server. I see lots of stuff about setting up SMTP services but thought that was about mail out and re-routing, but how do you get the server to "listen" for mail to the domain (assuming I open port xyz or whatever it is) ?

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• Why does the EFI shell not detect my Windows DVD?

  - by Oliver Salzburg

  I'm currently looking into (U)EFI for the first time and am already really confused. I insert the Windows Server 2008 R2 Enterprise disc into the DVD-ROM and boot into the EFI shell. The shell will automatically list all detected devices, which are: blk0 :CDRom - Alias (null) Acpi(PNP0A03,0)/Pci(1F|2)/Ata(Primary,Master)/CDROM(Entry0) blk1 :BlockDevice - Alias (null) Acpi(PNP0A03,0)/Pci(1F|2)/Ata(Primary,Master) To my understanding, it should have already detected the filesystem on blk0 and should have mounted it as fs0. Why is that not happening? If I insert a USB drive, it gets mounted just fine. The board is an Intel S5520HC in case that makes a difference.

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• Transferring websites from x64 to x86 server

  - by Ke

  Hi, I run a x64 staging server here along with the following: Solr Java etc. However, I am about to get a linode vps for production and quickly realising that x86 is the way to go for their lowest RAM package (thinking to upgrade later). My staging server is x64 with 12gb ram, so going down to 300mb ram is going to feel devilishly slow ;/ Here are my questions: 1) Will I have problems transferring my scripts, dbs etc from a x64 to x86 server? e.g. solr indexes 2) Is it worth going for the x86 package? I am probably going to upgrade later down the line and x64 might be better for the servers with more RAM? should I stick with x64 instead as there isnt much difference when using with low RAM? Cheers Ke

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• Video compression artifacts in Flash

  - by lvanderhart

  This only started happening in the past two days, which seems very odd to me. Everything worked flawlessly up until now, and I use my my computer as my primary TV. Flash video from Hulu and Amazon, for no apparent reason, now have lots of artifacts in them. Some scenes are ok, but some are completely scrambled and unwatchable. My connection is a 15mb fios, and bandwidth tests indicate my connection speed is ok. I've tried the latest production version of Flash, as well as the 10.1RC4. Same problem. Enabling or disabling hardware acceleration in Flash makes no difference (with the scrambling issue, quality is better overall with hardware). Using a different H264 codec doesn't clean up the issue, although the scrambling does look different. I'm kind of stumped. The only thing I can think of now is to reinstall windows, which is obviously a drastic step. Edit: Forgot to say: Windows 7, Athlon 64X2, Geforce GTS 250

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• Scanned JPEGs are large and slow to load - can they be optimized losslessly?

  - by Alistair Knock

  I have hundreds of JPEG photographs which were scanned about 5 years ago from negative using a Konica Minolta DiMAGE Scan Dual IV. The dimensions are ~4500x3000, and the filesize is around 12Mb, compared to shots from a DSLR with dimensions of 3000x2300 and filesize of 2-4Mb (actually, these are the output from a RAW convertor). The filesize is obviously quite a big difference, but the issue that's bothering me is that the (perceived) loading time is at least 10 times slower. Is this size/speed discrepancy likely to be because the scanner software saved the JPEGs inefficiently / using an old compression format, or is it simply that the scanned negatives contain much more "detail" (in the form of grain/noise) than the digital images? If the former, is there a way to losslessly optimize them? I've tried re-exporting the scanned files to full size JPEG from my RAW software but the filesize is pretty much the same. Both files will have been saved at 100 quality.

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• Rail's FileStore with Linux Disk Caching or RAMdisk?

  - by Yo Ludke

  I have a Ruby on Rails application that stores it's catched files on the filesystem (Rails file-system cache). I was thinking about changing to memcached Store, but a short test shows it isn't a big difference in speed. From linuxatemyram.com I learned a bit about file caching. On the current machine there would be around 40..45GB RAM left which isn't needed for the application and which can be used to linux-disk-cache this rails file cache store. The disk is a RAID10 system with almost 120MB disk perfomance. How can I tell Linux to use free RAM more deliberately and not to be shy about using it? Do think it's necessary to adjust a sysyctl/.. value here, or would I have performance advantages to put the File Store root diretory on a ramdisk? (Loosing the cache during a reboot wouldn't be a problem)

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• Calendar shows lighter/greyed out items

  - by ACarter

  Here's a screenshot of my Windows 8.1 Calendar. As you can see, some of the items appear lighter/greyed out (ie on the 15th, 21st). Why is this? I have not noticed any difference between these items, and none of the ideas I've had for why (ie items without a specific time are lighter) have fitted. My calendar is synced to hotmail. The calendar online (hotmail.co.uk). (There are a couple of new events, but nothing should have changed with the earlier ones.) This event appears lighter. But this event does not.

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• Calculate age in days/months/years in OpenOffice

  - by Sanjay

  In need to find the age in days - months - years in OpenOffice. There is DATEDIF() in Microsoft Excel. You can use it to find the difference in days/months/years between two dates. Age Calculation You can calculate a persons age based on their birthday and todays date. The calculation uses the DATEDIF() function. The DATEDIF() is not documented in Excel 5, 7 or 97, but it is in 2000. (Makes you wonder what else Microsoft forgot to tell us!) Birth date : 01-Jan-60 Years lived : 52 =DATEDIF(C8,TODAY(),"y") and the months : 4 =DATEDIF(C8,TODAY(),"ym") and the days : 30 =DATEDIF(C8,TODAY(),"md") One can calculate by below formula, but it is cumbersome to calculate months. Another way to calculate age This method gives you an age which may potentially have decimal places representing the months. If the age is 20.5, the .5 represents 6 months. Birth date : 01-Jan-60 Age is : 52.41 =(TODAY()-C23)/365.25

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• Explanation of various domain name records?

  - by Kumar

  At the time of hosting, normally we just change name servers in the domain control panel. It's fine if both mail and web servers are the same. When they're different, we need to change the DNS records. When I try to point my blog to my domain name, I came to know about the various types of DNS records - A Records, AAA Records, MX Records, CNAME Records, NS Records, TXT Records, SRV Records, SOA Records, etc. I searched on Google, but would like to know more about these deeply. I found this link on the Internet - http://www.directnic.com/help/faq/?question_id=103 and got some idea about the different DNS records. But I have some more questions. How do the domain name records work? Is there any difference between NS record and other records in the way they work? Where should the NS record point to when using A record, CNAME record and MX record?

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• Asterisk does not recognise DTMF tones from mobile phones

  - by Eugene van der Merwe

  We have an Asterisk 1.8.7.0 (the Elastix derivative) switchboard. Every since a month ago, seemingly out of the blue, the switchboard does not recognise DTMF tones any more from mobile phones. Testing the switchboard using 7777 works. Testing the switchboard from a normal phones works. Testing the switchboard from a mobile phone fails. Looking at the log file I can't see anything. I used 'asterisk -rvvvv' and 'tail -f /var/log/asterisk/full' to see the live output and scan the logs. I guess I don't see anything because it's simply not recognising the DTMF tones. I did brief research and found an old setting for SIP phones, 'rfc2833compensate=yes', and tried adding this to 'sip_general_custom.conf'. After that I did 'core restart when convenient' but that didn't make any difference. Could anyone give me some additional troubleshooting steps?

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• PowerShell Remoting: No credentials are available in the security package

  - by TheSciz

  I'm trying to use the following script: $password = ConvertTo-SecureString "xxxx" -AsPlainText -Force $cred = New-Object System.Management.Automation.PSCredential("domain\Administrator", $password) $session = New-PSSession 192.168.xxx.xxx -Credential $cred Invoke-Command -Session $session -ScriptBlock { New-Cluster -Name "ClusterTest" -Node HOSTNAME } To remotely create a cluster (it's for testing purposes) on a Windows Server 2012 VM. I'm getting the following error: An error occurred while performing the operation. An error occurred while creating the cluster 'ClusterTest'. An error occurred creating cluster 'ClusterTest'. No credentials are available in the security package + CategoryInfo : NotSpecified: (:) [New-Cluster], ClusterCmdletException + FullyQualifiedErrorId : New-Cluster,Microsoft.FailoverClusters.PowerShell.NewClusterCommand All of my other remote commands (installing/making changes to DNS, DHCP, NPAS, GP, etc) work without an issue. Why is this one any different? The only difference is in the -ScriptBlock tag. Help!

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• AD, Windows-NT Authentication queries

  - by rockbala

  Need Help on the following questions. When a users login (on a computer in the network) is validated against AD what is/are the authentication method used? When a users login is validated in Windows NT environment (not AD) what is/are the authentication method used? If all user's account is on AD, is it possible to change the authentication mechanism only (or protocols) from AD to NT and vice versa (if possible)? If part/whole of question 3 is valid, where should one look to change these authentication methods ? What is the difference between AD and Windows-NT authentication ? Windows server 2008 Domain controller used. Regards, Balaji

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• Start tomcat webapp with root privileges

  - by Hagay Myr

  I built a webapp that uses libpcap (via jpcap). In order to be able to get the network interfaces list or to bind to a network interface, the application (in this case a webaap that runs from tomcat server) must be running with root privileges. During development I simply ran Eclipse with root privileges (sudo eclipse) and my webapp worked just fine with Eclipse's local tomcat server. However, when I try to deploy my webapp to the "real" tomcat server, it isn't working. I Also tried to start the tomcat6 service with sudo and changed the TOMCAT6_USER definition (defined in /etc/init.d/tomcat6) from "tomcat6" to "root" but it made no difference. What should I do to make it work?

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• Escape not idempotent in zsh's vi emulation?

  - by user1063042

  I have zsh configured to use vi keybindings. I've noticed some unexpected behavior with "escape". In vim (I haven't tested vanilla vi) if I hit escape twice, I can hit 'i' once to return to insert mode. In zsh if I happen to hit escape twice, hitting 'i' won't return me to insert mode, I have to hit it twice. Another example of this comes up in navigation. If I hit escape once, I can use '^' and '$' as expected. But if I've accidentally hit escape twice (or more) they fail to work until I return to insert mode and escape again. Do I somehow have zsh configured incorrectly, or is this just a known difference in zsh's vi emulation?

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• mount dev, proc, sys in a chroot environment?

  - by Patrick

  I'm trying to create a Linux image with custom picked packages. I followed the guide here http://www.olpcnews.com/forum/index.php?topic=4766.0 However, when I tried to install some packages, it failed to configure due to missing the proc, sys, dev directories. So, I learned from other places that I need to "mount" the host proc, ... directories to my chroot environment. Though, I saw two syntax and am not sure which one to use. In host machine: mount --bind /proc <chroot dir>/proc and another syntax (in chroot envrionment): mount -t proc none /proc Which one should I use, and what are the difference? Edit: What I'm trying to do is to hand craft the packages I'm going to use on an XO laptop, because compiling packages takes really long time on the real XO hardware, if I can build all the packages I need and just flash the image to the XO, I can save time and space.

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• Apache log file problem

  - by Luke

  I've recently set up an Apache 2 web server and I noticed a quite a few lines in the error and access log that start with the follow sequence (but longer). Does anyone know where this comes from? ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ....... My set up is an Apache 2 load balancer with mod_balancer enabled and two Apache 2 web servers. All three servers write to the same log files on a share located on a NFS. My first guess is that my problem has to do with it since it's the only difference that comes to mind from other set ups I've used in the past but I'm not sure.

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• Configuring port forwarding on Fortigate 50B

  - by GomoX

  I can't for the life of me get port forwarding to work on my Fortigate 50B. I followed the setup tips described on this other SF thread with no success. The only specific difference I can find is we are using load balancing through 2 different internet uplinks. Is there any caveat specific to this scenario that I might be missing? If you need any specific additional information please ask because I think I have checked everything: Virtual IP mapping on external interface wan1 ACCEPT all from any on wan1 to the corresponding server on internal No seeming offending firewall rules (any specific pitfalls that I might want to check for?)

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• Fluxbox startup file not working

  - by Jack

  I am placing apps into my fluxbox startup file as per the instructions, however nothing starts up except fluxbox. It doesn't matter what app I try, so it isn't an app problem. here is my startup file: #!/bin/sh # # fluxbox startup-script: # # Lines starting with a '#' are ignored. # Change your keymap: xmodmap "/home/josh/.Xmodmap" # Applications you want to run with fluxbox. # MAKE SURE THAT APPS THAT KEEP RUNNING HAVE AN ''&'' AT THE END. tint2 & tilda & # And last but not least we start fluxbox. # Because it is the last app you have to run it with ''exec'' before it. exec fluxbox # or if you want to keep a log: # exec fluxbox -log "/home/josh/.fluxbox/log" I have also tried tests such as "touch ~/testwoked" and such, nothing works. It makes no difference if the file is executable or not.

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• SQL Server Installer Closes Silently Without Errors

  - by ashes999

  When I run the SQL Server 2008 R2 Express installer (32-bit or 64-bit), nothing happens. It will get to the screen where it asks me to accept the terms of license and send anonymous feedback; I check off both boxes and click Next, and it automatically starts installing the Support Files. And then the window disappears. I tried looking through the log files, but didn't see any errors. I've tried: x64 SQL Server R2 express x86 SQL Server R2 express X64 SQL Server R2 (full) X64 SQL Server Management Studio Of these, only management studio installed correctly; the two express editions failed silently, and the full version gave me different errors. I also tried running in Administrator mode (despite being logged in as an administrator user), but again, no difference.

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• Sharepoint database connection issue after upgrade to SQL Server 2008 R2

  - by Neil Hoff

  I took a backup of all our Sharepoint WSS 3.0 databases and restored them to a new Windows 2008 R2 server. The new SQL server has the same name and IP address as the old one. The only difference between the two is the new one has SQL 2008 R2 and the old one has SQL 2005. When I navigate to the sharepoint url I get this error: Cannot connect to the configuration database. I checked the logs at this location: "%commonprogramfiles%/Microsoft Shared/web server extensions/12/Logs" and found this error: System.Data.SqlClient.SqlException: Login failed. The login is from an untrusted domain and cannot be used with Windows authentication. Any ideas?

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• Is there a way to create a consistent snapshot/SnapMirror across multiple volumes?

  - by Tomer Gabel

  We use a NetApp FAS 6-series filer with an application that spans multiple volumes. For backup purposes I would like to create a consistent snapshot that spans these volumes at the same point in time (or at least with an extremely low delta); additionally, we'd like to to use SnapMirror to replace the production environment to test volumes. The problem is in creating a consistent snapshot/SnapMirror, since these commands are not transactional and do not take multiple parameters. I tried scripting consecutive "snap create" or "snapmirror resync" commands via SSH, but there's always a 0.5-2 second difference between each snapshot. It's currently "good enough", but I'm seriously concerned about the consistency impact with increased load (we're currently in pre-production). Has anyone managed to create a consistent snapshot that spans several volumes? How did you pull it off?

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• Building new GIS Workstation - is it worth upgrading to a workstation GPU?

  - by bsigrist

  We are currently building a machine from scratch to act as a GIS workstation. The primary software used is ESRI's ArcGIS and we are mainly working with vector data using raster data only for contextual background imagery. In the past I have built a GIS machine and used a consumer grade gaming GPU (Nvidia 9800GT) and found it to perform fine. However, I have always wondered if I would have been better off equipping it with a workstation GPU such as a Quadro series. Would a workstation GPU make a noticeable difference doing 2D GIS operations or should I save money on the build and equip it with another 9800GT?

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