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• Silverlight Cream Top Posted Authors September, 2010 to February, 2011

  - by Dave Campbell

  It's a bit past the first of March, and it's now time to recognize devs that have a large number of posts in Silverlight Cream. Ground Rules I pick what posts are on the blog Only posts that go in the database are included The author has to appear in SC at least 4 of the 6 months considered I averaged the monthly posts and am only showing Authors with an average greater than 1. Here are the Top Posted Authors at Silverlight Cream for September 1, 2010 through February 28, 2011: It is my intention to post a new list sometime shortly after the 1st of every month to recognize the top posted in the previous 6 months, so next up is March 1! Some other metrics for Silverlight Cream: At the time of this posting there are 7672 articles aggregated and searchable by partial Author, partial Title, keywords (in the synopsis), or partial URL. There are also 118 tags by which the articles can be searched. This is an increase of 368 posts over last month. At the time of this posting there are 984 articles tagged wp7dev. This is an increase of 201 posts over last month, or 54% of the posts added. Stay in the 'Light!

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• Reliable procedure/tool for removing print drivers in Windows 7 (domain environment)

  - by ultrasawblade

  One of the troubleshooting steps in resolving printer-related issues with any version of Windows is to remove installed print drivers and then reinstall the drivers. This is a domain environment and drivers are pulled from a print server. I've had occasion to need to do this on a user's system running Windows 7 Enterprise 64-bit. These procedures don't work: Removing the printer from Devices and Printers (doesn't remove driver obviously) Doing the above, going into Server Properties, and attempting to remove the driver (fails with a "driver in use" error) Opening an empty mmc, adding the Print Management snap-in, and attempting to do the above. Doing sc stop spooler and sc start spooler before doing both of the above Now I know it's possible to remove drivers with the spooler service stopped and then going into the spool directory, as well as deleting registry entries. I'm asking if a tool exists to do this where I can just select the driver in question and it be removed.

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• What is a easiest way to implement Mail Server in ubuntu and hook in webmail through XAMPP?

  - by Parris

  Hi Everyone, I currently have xampp running on my ubuntu server. I tried a variety of things including installing, postfix+dovecot+roundcube+postfixadmin (postfix+dovecot work I think, postfix admin also works, roundcube works and connects to dovecot but i cant create user accounts, or figure out how that works), citadel (it installed, but I have no idea how to make it work with xampp for webmail) and i tried messing with exim and vexim a bit also. In short I feel like this should be a lot easier, and I can't figure it out haha. XAMPP works fine. I got my server running with everything. I was thinking about mercury mail, but I need a webmail solution also. I was thinking about google apps, but 50 bucks a year per user is a steep change from free. Thanks for the help!

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• Understanding IDAT chunk of PNG file format

  - by DRapp

  From the sample image below, I have a border in yellow just for display purposes only. The actual .png file is a simple black/white image 3 pixels by 3 pixels. I was originally thinking to try as a 2x2, but that would not help trying to interpret low/hi vs hi/low drawing stream. At least this way, I would have two black, one white from the top, or one white, two black from the bottom.. So I read the chunks of data, get to the IDAT chunk, decode that (zlib) and come up with 12 bytes as follows 00 20 00 40 00 80 So, my question, how does the above get broken down into the 3x3 black and white sample... Also, it is saved in palette format and properly recognizes the bit depth of 1 and color palette of 2... color pallet[0] is RGBA all zeros. Palette1 has RGBA of 255, 255, 255, 0 I'll eventually get into the multiple other depth formats later, just wanted to start with what would expect to be the easiest. Part II. Any guidance on handling the other depth formats would help if anything special to be considered especially regarding alpha channel (which I am already looking for in the palette) that might trip me up.

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• HP Pavilion 15 with AMD dual graphics - Ubuntu live environment not starting

  - by creepus

  I've had this laptop for about a day now and have decided to try Ubuntu on it and determine if I want to install it. I created a USB, it booted (Secure Boot was on, I tried with Secure Boot off to no effect), and then the problem occurred. The screen turned off for a second, turned back on to a black screen, shut off again and turned back on with a dialogue box telling me that the system had to use low-graphics mode. I clicked OK, selected low-graphics mode from the menu and clicked OK. The screen switched to the boot messages and did not go any further than this. Ctrl+Alt+DEL started rebooting the laptop though. I tried booting again, but this time I edited the boot options in GRUB to add nomodeset. This time, the laptop only booted to a black screen. Ctrl+Alt+F2 took me to a prompt, I tried startx from there, but X didn't start, complaining that it wanted kernel mode setting back. I can not seem to find any option to disable one graphics chip or the other in the UEFI setup menus. Laptop : HP Pavilion 15-E004AU. The CPU : AMD A6-4400M APU with Radeon(tm) HD Graphics The graphics chip : AMD Radeon HD 7520G + 8670M Dual Graphics. The Ubuntu version : 13.10, 64 bit. Thanks. EDIT: I tried 12.04.3 LTS, it managed to bring the desktop up. There are severe graphics glitches after about two minutes though.

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• How to refactor a myriad of similar classes

  - by TobiMcNamobi

  I'm faced with similar classes A1, A2, ..., A100. Believe it or not but yeah, there are roughly hundred classes that almost look the same. None of these classes are unit tested (of course ;-) ). Each of theses classes is about 50 lines of code which is not too much by itself. Still this is way too much duplicated code. I consider the following options: Writing tests for A1, ..., A100. Then refactor by creating an abstract base class AA. Pro: I'm (near to totally) safe by the tests that nothing goes wrong. Con: Much effort. Duplication of test code. Writing tests for A1, A2. Abstracting the duplicated test code and using the abstraction to create the rest of the tests. Then create AA as in 1. Pro: Less effort than in 1 but maintaining a similar degree of safety. Con: I find generalized test code weird; it often seems ... incoherent (is this the right word?). Normally I prefer specialized test code for specialized classes. But that requires a good design which is my goal of this whole refactoring. Writing AA first, testing it with mock classes. Then inheriting A1, ..., A100 successively. Pro: Fastest way to eliminate duplicates. Con: Most Ax classes look very much the same. But if not, there is the danger of changing the code by inheriting from AA. Other options ... At first I went for 3. because the Ax classes are really very similar to each other. But now I'm a bit unsure if this is the right way (from a unit testing enthusiast's perspective).

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• Azure Search Preview

  - by Greg Low

  One of the things I’ve been keeping an eye on for quite a while now is the development of the Azure Search system. While it’s not a full replacement for the full-text indexing service in SQL Server on-premises as yet, it’s a really, really good start. Liam Cavanagh, Pablo Castro and the team have done a great job bringing this to the preview stage and I suspect it could be quite popular. I was very impressed by how they incorporated quite a bit of feedback I gave them early on, and I’m sure that others involved would have felt the same. There are two tiers at present. One is a free tier and has shared resources; the other is currently $125/month and has reserved resources. I would like to see another tier between these two, much the same way that Azure websites work. If you have any feedback on this, now would be a good time to make it known. In the meantime, given there is a free tier, there’s no excuse to not get out and try it. You’ll find details of it here: http://azure.microsoft.com/en-us/documentation/services/search/ I’ll be posting more info about this service, and showing examples of it during the upcoming months.

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• Solid Edge ST6 - 2D Modeling: dimensions

  - by juFo

  I'm currently making some 2D drawings in Solid Edge ST6. I have several circles which I need to change so that they have an equal diameter and equal space between both circles, etc... Currently my drawing looks a bit messy with all the dimensions that I use: I use the Smart Dimension tool and the Distance Between tool but I have no clue to make my drawing more readable by adding less dimensions. Is there a way to copy/paste dimensions or let a circle follow the dimensions of one other circle? I hope you understand the question. Thanks in advance (I could not find anything about Solid Edge, so I hope superuser is the correct place to ask.)

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• how to properly implement alpha blending in a complex 3d scene

  - by Gajet

  I know this question might sound a bit easy to answer but It's driving me crazy. There are too many possible situations that a good alpha blending mechanism should handle, and for each Algorithm I can think of there is something missing. these are the methods I've though about so far: first of I though about object sorting by depth, this one simply fails because Objects are not simple shapes, they might have curves and might loop inside each other. so I can't always tell which one is closer to camera. then I thought about sorting triangles but this one also might fail, thought I'm not sure how to implement it there is a rare case that might again cause problem, in which two triangle pass through each other. again no one can tell which one is nearer. the next thing was using depth buffer, at least the main reason we have depth buffer is because of the problems with sorting that I mentioned but now we get another problem. Since objects might be transparent, in a single pixel there might be more than one object visible. So for which Object should I store pixel depth? I then thought maybe I can only store the most front Object depth, and using that determine how should I blend next draw calls at that pixel. But again there was a problem, think about 2 semi transparent planes with a solid plane in middle of them. I was going to render the solid plane at the end, one can see the most distant plane. note that I was going to merge every two planes until there is only one color left for that pixel. Obviously I can use sorting methods too because of the same reasons I've explained above. Finally the only thing I imagine being able to work is to render all objects into different render targets and then sort those layers and display the final output. But this time I don't know how can I implement this algorithm.

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• VLC without chrome in Windows

  - by timberwo7ves

  I'm trying to run VLC (2.1, 64 bit) without any chrome on Windows 7. You can achieve it by going to Preferences, and in the Interface tab, unchecking Integrate video in interface, and also in the Video tab, unchecking Window decorations. The problem lies in the fact that without Window decorations there is no apparent way to move or resize the video window - in GOM player, for example, you can move window by dragging on the video itself; is there an option for this in VLC? Ideally, I would like to move the window by the method described above (by dragging the video), and would like the Window decorations to reappear on mouseover, to allow resizing; I'm a new VLC user, but unsure how far the customisation goes. - I'd settle with just the moving of the window via dragging the video if this is possible by advanced setting. There is a similar question here, but not exactly, and no solution to that particular question.

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• customized xkb layouts not working (in KDE?) after upgrade from Ubuntu 9.10 to 10.04

  - by Alan

  I customised my keyboard layout in 9.10 by editing the appropriate /usr/share/X11/xkb/symbols/ file. After upgrading to 10.04 I noticed it had overwritten all my modifications, so I recovered the layout and overwrote the symbol file's base entry. Sadly KDE (and, presumably, the entire OS) seems to ignore the files altogether. The help files don't mention anything about modifying layouts anyway (and the layout switcher seems to be using setxkbmap, which uses the above path according to its man page), so I'm at a bit of a loss. Do I need to compile this into some other format somehow or how do I get it to work?

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• setup advanced filtering and access restrictions on dd-wrt using iptables

  - by Nova deViator

  I have a linksys WRT54GL router with a DD-WRT installed and I want to setup some advanced filtering that seem to not be available through "Access restrictions" web gui option. I guess I would be using IPTABLES then. I have ssh access to router and can run iptables, but I'm not so experienced with iptables. So here are my needs: my policy would be deny all first and then allow exceptions allow all http (port 80) access to WAN through wireless allow all other traffic only to PCs with specific MAC addresses allow internet access to PC with specific MAC address according to schedule (let's say everyday between 18:00-21:00) is this possible to setup with IPtables? could somebody help me a bit with it? or should go and RTFM?

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• Providing SSH tunnling, what to think about when configuring Ubuntu Server

  - by bigbadonk420

  Recently I've considered, mostly as a pet project, to set up accounts for a closed group of users via SSH to my box with the purpose of SSH tunnling things like web traffic -- some of it for friends that live abroad and perhaps also to help some people bypass national censorship. There's some things I imagine that I need to do, such as: Disabling shell access by setting the shell to /bin/false or similar. Get some software that can track bandwidth usage on a per-user basis historically Make sure that each user can only use a certain amount of bandwidth. The reason I'm posting here to begin with is to look around and get some pointers regarding what kind of things I should read up on, as well as hearing if there are any software recommendations for doing what I'm trying to do. I already know a bit since I've actually gotten SSH tunnling up and running already, I just don't feel like letting it loose to other people without restrictions and some basic monitoring. I'm primarily trying to learn here, so if you think this is a Very Bad Idea (or if you have a better idea on how to do this) then by all means say so, but please include some information on how to do it :) (I'm also open to trying things like OpenVPN but it seems really hard to set up, also I've heard SSH more often works in locked down environments)

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• How to parse JSON data from web more faster [closed]

  - by Kaidul Islam Sazal

  I have json inventory inventory.json on the server like this: [ { "body" : "SUV", "color" : { "ext" : "White diamond pearl", "int" : "Taupe" }, "id" : "276181", "make" : "Acura", "miles" : 35949, "model" : "RDX", "pic" : [ { "full" : "http://images1.dealercp.com/90961/000JNBD/001_0292.jpg" } ], "power" : { "drive" : "Front wheel drive", "eng" : "2.3L DOHC PGM-FI 16-VALVE", "trans" : "Automatic" }, "price" : { "net" : 29488 }, "stock" : "6942", "trim" : "AWD 4dr Tech Pkg SUV", "vin" : "5J8TB2H53BA000334", "year" : 2011 }, { "body" : "Sedan", "color" : { "ext" : "Premium white pearl", "int" : "Taupe" }, "id" : "275622", "make" : "Acura", "miles" : 40923, "model" : "TSX", "pic" : [ { "full" : "http://images1.dealercp.com/90961/000JMC6/001_1765.jpg" } ], "power" : { "drive" : "Front wheel drive", "eng" : "2.4L L4 MPI DOHC 16V", "trans" : "Automatic" }, "price" : { "net" : 22288 }, "stock" : "6945", "trim" : "4dr Sdn I4 Auto Sedan", "vin" : "JH4CU2F66AC011933", "year" : 2010 } ] here are two index, There are almost 5000 index like this. I parsed this json like this: var url = "inventory/inventory.json"; $.getJSON(url, function(data){ $.each(data, function(index, item){ //straight-forward loop if(item.year == 2012) { $('#desc').append(item.make + ' ' + item.model + ' ' + '<br/>' + item.price.net + '<br/>' + item.pic[0].full); } }); }); This is working fine.But the problem is that, this searching and fetching process is little bit slow as there are 5000 indexes already and it's increasing day by day. It seems that, it is a straight-forward loop to parse the data and a normal brute-force method. Now I want to know if there any time efiicient way to parse more faster.Any faster method to parse instead of straight-forward loop ?

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• Windows 7 Line In Delay Issue

  - by CheeseConQueso

  Not sure if this question should be posted on a different stack exchange site, so if you find that it should not be posted here, please move it. Either way, if you know the solution, please advise. I'm running Windows 7 Pro 32-bit on my Dell Latitude 2100 netbook and I'm having an issue with the line in device/driver/functionality. The device & driver are stock: Driver Date: 7/13/2009 Driver Version: 6.1.7600.16385 I'm almost sure that the manufacturer of the sound card is RealTek. The problem is that there is a delay (when monitoring input) between the source and the speakers. My setup is bass guitar running through a 12' long instrument cable (1/4") with a 1/4" female to 1/8" male adapter into the line in port on the computer. Then the 15' long headphones/line out cable goes into a standard set of powered speakers. How do I get rid of this delay? Thanks for any help.

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• How do I relay output from a soundboard into input on skype?

  - by Anthony

  I'm trying to find a way to play audio from flash soundboards to people on skype. I apparently do not have Wave/Stereo mix/What u hear supported on my soundcard (I have windows 7 professional). I only have one soundcard, and I'm usually using headset. However, I have another laptop with windows vista on it that does have stereo mix available. The problem is, it still doesn't work. When I click an audio bit it just doesn't do anything. It plays on my end, but not to the person on the other end. Is there a way to do this? What am I missing?

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• On Mac OS X how can I monitor what is using my internet connection?

  - by Jon Hopkins

  I've got a relatively limited broadband connection (I live miles from the nearest exchange) and from time to time net access (but nothing else) slows to a near crawl. I know from a bit of monitoring software that the connection is being fairly heavily used which would explain it but I don't know what's using it. There are certainly plenty of things which might (these days there are dozens of apps that will either regularly or infrequently check data or download updates) but how can I find out? I'm happy to pay (a small amount of) money if needed, though in that case I'd rather it were a recommendation that me just Googling for something.

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• Want to SASL/TLS authentication

  - by Naval

  I want to send mail from remote client from my server(centos 5 and 64 bit) for this i need to sasl auth but i have no idea about it what changes i have to make in my server and client here I want to make things more clear my server's hostname/Ip is = test02.s80.in/176.67.172.209 now i want to authenticat remote client vps2.smail.info and vps1.smail.info to deliver mail .. so plz help me if any systematic way to do sasl/tls authentication for these clients... i am using DNS load-balancing(round-robin) mx record lookup technique for load balancing..

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• external display in Ubuntu 13.04

  - by thuc2009

  I have had a look on series of similar topics but I could not find a right answer. Currently, I bought laptop Dell latitude E6530 and installed Ubuntu 13.04 (64 bit) alongside with Windows 7 (I could not get rid of it because of some special programs for work). Ubuntu worked well, however, it did not detect the external displays (Dell 23" and Dell 19") no matter I plugged them before or after booting. Edited: I connected my laptop to those external displays through a laptop dock. I went to Settings- Display, the displays were there, but when I enabled them, Ubuntu logged off automatically. No external display was detected. In addition, the laptop screen sometimes was detected as Dell 23" I got an advice from similar topic that nvidia driver should be updated to version 313 or 319. I upgraded driver and the unity launcher disappeared, main display resolution turned to 640*480 and none of external displays was detected. I tried to use additional drivers, but when I turned it on, it told me that there was no driver to be used. Could some one tell me what should I do ? Edited : options vmwgfx enable_fbdev=1

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• Which home automation technology to choose? x10 zwave e.t.c. in UK [closed]

  - by Stewart Robinson

  I work away most of the week and have to leave my house empty. I would like to have home automation monitor and control my house. Naturally I want to be a bit of a geek and do some of it myself so I've researched stuff like x10, zwave, cbus e.t.c. but I want opinions on which I should use in my house. I have a Linux box that could be used to actually do controlling if needed. So which technology and why?

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• Windows XP , HP , IntelInside Trobelshooting

  - by Jamil Hneini

  My Windows XP PC has stopped booting. On start up, before Windows boots a screen appears saying: Windows Could Not Boot: Could Not Find or Corrupted file <Windows root>\Sytem32\Hal.dll Please Reinstall the file... From that I understand that I have to reinstall the OS but my computer is so old that I have lost the backup and recovery disk. My Computer's Info: 32Bit Computer Pentium 4 Windows XP Service Pack 2 HP History: My Computer has 4 hard drives 2 internal 40 GB drives (C And D) 2 external 8GB drives (E And F) Additional Info: I need the files inside C And E The computer reads my flash drive as a hard drive (8.45GB)(I have never booted while my USB pluged in while I was troubleshooting) With some test I discovered that the C drive wasn't detected by the computer I have already configured the boot order of BiOS I have Set The SATA to IDE The Question: I have a setup for windows 8 32 bit how can I boot from my USB to run that setup? If that isn't the proper way to handle this problem please tell me the proper way.

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• Large file copy from NFS to local disk performance drop

  - by Bernhard

  I'm trying to copy a 200GB file from an NFS mount to a local disk. The local disk is an XFS filesystem on a LVM on top of a RAID 5 system (hardware RAID controler). I'm using rsync to monitor the transfer speed. At the beginning the IO speed is about 200MB/s, stable for the first 18GB. But then the performance drops by a factor of 10-20 and never recovers to the initial rate. Sometimes it reaches about 50-100MB/s but just for a few seconds and then the process seems to hang for a bit. At the same time all file-stat operations on the target filesystem are blocking for a long time (minutes). Also interrupting the copy process blocks for several minutes, a sub-sequent delete of the partly copied file takes also several minutes. Any ideas what could be causing this?

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• remove disks or other media press any key to restart

  - by Sam I am

  I'm having an issue regarding a disk imaging process. I have a WinPE image that will re-partition, the hard drive, and put a boot-able image on it. When I run the imaging process from an initial state, I get the following error remove disks or other media press any key to restart If I run the process subsequent times, It will work as desired, but I'm still interested in getting the process to work the first time. How do I figure out what's going on here? what should I be looking at? I'm a little bit out of my depth here, I don't know what to do next

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• Making efficeint voxel engines using "chunks"

  - by Wardy

  Concept I'm currently looking in to how voxel engines work with a view to possibly making one myself. I see a lot of stuff like this ... https://sites.google.com/site/letsmakeavoxelengine/home/chunks ... which talks about how to go about reducing the draw calls. What I can't seem to understand is how it actually saves draw call counts on the basis of the logic being something like this ... Without chunks foreach voxel in myvoxels DrawIfVisible() With Chunks foreach chunk in mychunks DrawIfVisible() which then does ... foreach voxel in myvoxels DrawIfVisible() So surely you saved nothing ?!?! You still make a draw call for each visible voxel do you not? A visible voxel needs a draw call in either scenario. The only real saving I can see is that the logic that evaluates a chunk will be able to determine if a large number of voxels are visible or not effectively saving a bit of "is this chunk visible" cpu time. But it's the draw calls that interest me ... The fewer of those, the faster the application. EDIT: In case it makes any difference I will probably be using XNA (DX not OpenGL) for my engine so don't consider my choice of example in the link above my choice of technology. But this question is such that I doubt it would matter.

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• No Games Installed with Windows 7 Professional

  - by Charles Didier

  Ordered a PC from HP with Windows 7 Professional 64-bit preinstalled, of course. No Win7 disc was included with computer. There are no games installed. I have tried to "activate" them through the Control Panel procedure, but each time I do it there is an error message telling me that not all components installed. And my Games folder is empty. Is there a solution? Synetech asked what I meant by "activate through Control Panel." I'm referring to the "Turn windows features on" procedure that's supposed to work for everybody. I'm sure it does for most, but it didn't for me.

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