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  • CUPS Authentication for Admin on localhost:631 interface

    - by Tony Kruse
    I have searched quite a bit, saw the one response that purported to have a solution to this but it did not work in my case. My Brother printer is not shown in CUPS so I go to Admin-Add Printer it gives me the User Name/Password popup with refuses to recognize my user name on the machine. This is a brand new install of 13.1. My Restrict Access to the admin pages section has: Order allow, deny Allow localhost

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  • Why can't 12.04 installer see one of my hard drives

    - by imparatore
    I'm trying to install Ubuntu 12.04 32-bit from a USB pen drive. I have two drives, a WD Caviar Black and a Samsung SPC250. At the "installation type" stage, it only sees my Samsung and the USB pen drive, not the WD. I checked the drive with gparted and everything seems fine. I tried the alternate installer but that doesn't work either I tried changing from IDE to AHCI in the BIOS and back What can I do now?

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  • No sound for headphones

    - by Joel Lino
    I was trying some of the solutions published in this forum for the same problem, but just one in particular work for me: add the line of code in the file alsa-base.conf. This just works for a few days, now the problem is back again. Any solution to fix this problem for good? Compaq Presario CQ40 $ lspci | grep -i audio 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) 01:05.1 Audio device: ATI Technologies Inc RS780 Azalia controller

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  • Ubuntu not booting after install from USB (kernel panic?)

    - by user287782
    After booting fine frome a live USB I installed it and everything was going swimmingly but when I try to boot from the hard drive it just stops and I have to do a hard reboot. I tried booting into grub as recommended in other questions but it wouldn't work. Here is a photo of the boot once stuck: Same for recovery boot: I've got an Asus K43SJ laptop with an intel i5, 4Gb of RAM, an nVidia GeForce GT 520M and a 750Gb hard drive.

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  • BI Beginner: Why to Use Excel 2013 Now

    - by John Paul Cook
    Most corporations and many individuals are slow to adopt new versions of Microsoft Office, particularly if the upgrade to the previous version was very recent. Excel 2013 is a special case and offers significant productivity enhancements. If you do business intelligence work or otherwise make your living with Excel, adding (notice I didn’t say upgrading to) Excel 2013 now makes a lot of sense. The Power View feature in Excel 2013 is a completely sufficient reason to add Excel 2013. It has to be enabled,...(read more)

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  • Point line collision reaction

    - by user4523
    I am trying to program point line segment collision detection and reaction. I am doing this for fun and to learn. The point moves (it has a velocity, and can be controlled by the user), whilst the lines are strait and stationary. The lines are not axis aligned. Everything is in 2D. It is quite straight forward to work out if a collision has occurred. For each frame, the point moves from A to B. AB is a line, and if it crosses the line segment, a collision has occurred (or will occur) and I am able to work out the point of intersection (poi). The problem I am having is with the reaction. Ideally I would like the point to be prevented from moving across the line. In one frame, I can move the point back to the poi (or only alow it to move as far as the poi), and alter the velocity. The problem I am having with this approach (I think) is that, next frame the user may try to cross the line again. Although the point is on the poi, the point may not be exactly on the line. Since it is not axis aligned, I think there is always some subtle rounding issue (A float representation of a point on a line might be rounded to a point that is slightly on one side or the other). Because of this, next frame the path might not intersect the line (because it can start on the other side and move away from it) and the point is effectively allowed to cross the line. Firstly, does the analysis sound correct? Having accepted (maybe) that I cannot always exactly position the point on the line, I tried to move the point away from the line slightly (either along the normal to the line, or along the path vector). I then get a problem at edges. Attempting to fix one collision by moving the point away from the line (even slightly) can cause it to cross another line (one shape I am dealing with is a star, with sharp corners). This can mean that the solution to one collision inadvertently creates another collision, which is ignored. Again, does this sound correct? Anyway, whatever I try, I am having difficulty with edges, and the point is occasionally able to penetrate the polygons and cross lines, which is undesirable. Whilst I can find a lot of information about collision detection on the web (and on this site) I can find precious little information on collision reaction. Does any one know of any good point line collision reaction tutorials? Or is my approach too flawed/over complicated?

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  • Best system for creating a 2d racing track

    - by tesselode
    I am working a 2D racing game and I'm trying to figure out what is the best way to define the track. At the very least, I need to be able to create a closed circuit with any amount of turns at any angle, and I need vehicles to collide with the edges of the track. I also want the following things to be true if possible (but they are optional): The code is simple and free of funky workarounds and extras I can define all of the parts of the track (such as turns) relative to the previous parts I can predict the exact position of the road at a certain point (that way I can easily and cleanly make closed circuits) Here are my options: Use a set of points. This is my current system. I have a set of turns and width changes that the track is supposed to make over time. I have a point which I transform according to these instructions, and I place a point every 5 steps or so, depending on how precise I want the track to be. These points make up the track. The main problem with this is the discrepancy between the collisions and the way the track is drawn. I won't get into too much detail, but the picture below shows what is happening (although it is exaggerated a bit). The blue lines are what is drawn, the red lines are what the vehicle collides with. I could work around this, but I'd rather avoid funky workaround code. Beizer curves. These seem cool, but my first impression of them is that they'll be a little daunting to learn and are probably too complicated for my needs. Some other kind of curve? I have heard of some other kinds of curves; maybe those are more applicable. Use Box2D or another physics engine. Instead of defining the center of the track, I could use a physics engine to define shapes that make up the road. The downside to this, however, is that I have to put in a little more work to place the checkpoints. Something completely different. Basically, what is the simplest system for generating a race track that would allow me to create closed circuits cleanly, handle collisions, and not have a ton of weird code?

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  • How to tell the hotplug system which NTFS driver to use?

    - by koloman
    I need a version later than the one shipped with lucid because I want to make use of the new hide_hid_files and hide_dot_files mount options, which are not present before version 2010.8.8. Ever since I compiled and installed the latest version of NTFS-3G via checkinstall, whenever I plugin a NTFS mass storage device, Ubuntu chooses the ntfs kernel module upon the ntfs-3g fuse driver to mount it. I don't know how to tell my system to use the 3g driver. mount -t ntfs-3g and fstab entries work just fine.

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  • 3 Monitors, Ubuntu 12.04, Gnome 3, 2 nvidia cards, WITH xrandr or xinerama?

    - by Josh
    Ok. I have been banging my head against the wall for over a week now trying to get 3 monitors to work. I have: 1 - Nvidia 8600 GT 512MB PCIEx16 1 - Nvidia GT 240 1GB PCIEx16 They are not running in SLI (obviously). I have tried to use everything from tutorials to a few templates, all the way up to nvidia-settings, etc etc etc.. From what I hear, Xinerama doesnt like gnome 3 because of the compositing, although I have read a lot about using Xrandr instead, and getting the compositing working, but alas, I cannot. It always either crashes X and I have to replace the xorg.conf with my backup, or it defaults to the gnome-classic desktop, and on top of that, when it does default, it keeps adding more and more panels. Basically, I want to be able to use all 3 monitors (yes, just like in windows) to drag and drop from different windows. I have xorg-edit, but I am still not too sure on how to set this up? Is there any way to: A Get compositing working with 3 monitors, 2 nvidia cards, xinerama, and gnome 3? or BUse twinview with 3 monitors (I have heard it can be done by manually editing xorg.conf) or CSet up Xrandr to draw all 3 monitors with compositing. or DUse separate X for each monitor, and be able to use gnome with compositing, as well as drag between all 3 or EANYTHING. lol. I just want this to work. Any help you can provide would be greatly appreciated. BTW, I am running an ubuntu mini install with gnome. Everything works great but this. I can run it fine with 2 monitors and compositing, but not with 3. Also, what is the best GUI tool for editing xorg.conf? Im not finding anything that is up to date at all, and also is understandable by humans. haha. Im actually an engineer by trade, and have been working with computers a LONG time, but this xorg.conf stuff is really confusing the crap out of me. lol Thanks!

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  • Is there a file browser like an ER diagram for viewing website physical path structures?

    - by EASI
    I wish to know if there is a tool like this to replace windows explorer and similar in the work of managing files, specially those web-site structures that sometimes can get very big. I am asking it here because I sincerely do not know what terms to use in Google to find anything like it. It is like a diagram, but showing the tree directory structure and the contents of every folder at the same time, not just the one that is in focus.

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  • PHP, Apache and curl: Differences between Windows and Linux?

    - by beginner_
    I'm trying to run my php App on Ubuntu Server 11.10. This App works fine under Apache + PHP in windows. I have other applications that I can simply copy&paste between the 2 OS and they work on both. (These don't use cURL). However this one uses the php library tonic (RESTful webservices) and makes us of php cURL module. The issue is I'm not getting an error message which makes it impossible to find the issue. I (must) use NTLM authentication and this is done with AuthenNTLM Apache Module: Order allow,deny Allow from all PerlAuthenHandler Apache2::AuthenNTLM AuthType ntlm AuthName "Protected Access" require valid-user PerlAddVar ntdomain "domainName server" PerlSetVar defaultdomain domainName PerlSetVar ntlmsemtimeout 2 PerlSetVar ntlmdebug 1 PerlSetVar splitdomainprefix 0 All files that cURL needs to fetch override AuthenNTLM authentication: order deny,allow deny from all allow from 127.0.0.1 Satisfy any Since these files are only fectehd by cURL from same server, access can be limited to localhost. Possible issues are: NTLM auth isn't overridden for files requested through cURL (even though AllowOverride All is set) curl works differently on linux $ch = curl_init(); curl_setopt($ch, CURLOPT_COOKIE, $strCookie); curl_setopt($ch, CURLOPT_URL, $baseUrl . $queryString); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); $html = curl_exec($ch); curl_close($ch); other? Apache log says: [error] Bad/Missing NTLM/Basic Authorization Header for /myApp/webservice/local/viewList.php But this directory should override NTLM authentication using curl command line from windows to access same resource i get: <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html> <head> <title>406 Not Acceptable</title> </head> <body> <h1>Not Acceptable</h1> <p>An appropriate representation of the requested resource /myApp/webservice/myResource could not be found on this server.</p> Available variants: <ul> <li><a href="myResource.php">myResource.php</a> , type application/x-httpd-php</li> </ul> <hr> <address>Apache/2.2.20 (Ubuntu) Server at localhost Port 80</address> </body> </html> Note: This is duplicate from http://stackoverflow.com/questions/9821979/php-curl-on-linux-what-is-the-difference-to-curl-on-windows Is it was suggested I post it here. EDIT: Please see Ubuntu Server: Apache2 seems to attach .php to URI as I discovered why it does not work but need help so the issue does not occur anymore. ANSWER: The issue is the default Apache configuration on Ubuntu: Options Indexes FollowSymLinks MultiViews MultiViews is changing request_uri from myResource to myResource.php. Solutions: disable MultiViews in .htaccess: Options -MultiViews remove MultiViews from default config rename the file as example to myResourceClass I chose last option because that should work regardless of configuration and I only have 3 such files so the change took about 30 secs...

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  • Ubuntu 12.10 wont fully load

    - by Steve
    I want to try Ubuntu from my 16Gb stick without ditching Win7 just yet. Everything boots up fine, I get the spash screen, I get the question screen (Do you want to try Ubuntu or install (or something like that)) I select try and then my screen goes black with what appears to be a DOS prompt. No keyboard keys work at this time. Have tried re-downloading Ubuntu, rebooting etc. Any help very much appreciated. Regards Steve

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  • How do you explain refactoring to a non-technical person?

    - by Benjol
    (This question was inspired by the most-voted answer here) How do you go about explaining refactoring (and technical debt) to a non-technical person (typically a PHB or customer)? ("What, it's going to cost me a month of your work with no visible difference?!") UPDATE Thanks for all the answers so far, I think this list will provide several useful analogies to which we can point the appropriate people (though editing out references to PHBs may be wise!)

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  • Structure of a Git repository

    - by Luke Puplett
    Sorry if this is a duplicate, I looked. We're moving to Git. In Subversion, I'm used to having \trunk, \branches and \tags folders. With Git, switching between branches will replace the contents of the working directory, so am I right to assume that the way we used to work just doesn't apply with Git? My guess is that I'd have a repo folder with maybe a gitignore and readme.txt, then the folders for the projects that make up the repo, and that's it.

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  • Tricky situation with EF and Include while projecting (Select / SelectMany)

    - by Vincent Grondin
    Originally posted on: http://geekswithblogs.net/vincentgrondin/archive/2014/06/07/tricky-situation-with-ef-and-include-while-projecting-select.aspxHello, the other day I stumbled on a problem I had a while back with EF and Include method calls and decided this was it and I was going to blog about it…  This would sort of to pin it inside my head and maybe help others too !  So I was using DBContext and wanted to query a DBSet and include some of it’s associations and in the end, do a projection to get a list of Ids…   At first it seems easy…  Query your DBSet, call Include right afterward, then code the rest of your statement with the appropriate where clause and then, do the projection…   Well it wasn’t that easy as my query required I code my where on some entities a few degree further in the association chain and most of these links where “Many”…  I had to do my projection right away with the SelectMany method.  So I did my stuff and tested the query….  no association where loaded…  My Include statement was simply ignored !  Then I remembered this behavior and how to get it to work…  You need to move the Include AFTER your first projection (Select or SelectMany).  So my sequence became:   Query the DBSet, do the projection with SelectMany, Include the associations, code the where clause and do the final projection…. but it wouldn’t compile…   It kept saying that it could not find an “Include” method on an IQueryable… which is perfectly true!  I knew this should work so I went to the definition of the DBset and saw it inherited DBQuery and sure enough the include method was there…  So I had to cast my statement from start until the end of the first projection in a DBQuery then do the Includes and then the rest of my query….   Bottom line is, whenever your Include statement seem to be ignored, then maybe you will need to move them further down in your query and cast your statement in whatever class gives you access to the Include…   Happy coding all !

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  • Small (and fixed) Bug in IdentityServer v1.0

    - by Your DisplayName here!
    It was brought to my attention that fedutil does not work anymore with IdSrv v1 metadata. And I can confirm that. The reason for this bug is my recent change to the XmlWriter factory methods which have a different default behavior when it comes to encoding. Since there were only 20 downloads so far – I fixed the bug in-place (shame on me). So when you are one of the early adopters and run into this problem – just re-download IdSrv ;) HTH

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  • Webpage Construction For SEO - Navigation

    Few things are more frustrating then going to a new page you're interested in and finding out it has horrible Navigation. I mean the kind of navigation that would make Cheech and Chong look like they knew where they were going. A back button that doesn't work, dead homepage link, dead end pages..........you know, you been to 'em, and you never go back to them either.

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  • Making Your Computer More Energy Efficient

    Whether you have a fully equipped home office or whether you only touch a computer when you?re at work in an office outside the home, there?s no denying that a computer is a wonderful tool ? that use... [Author: Nick Vassilev - Computers and Internet - April 20, 2010]

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  • SQL Server 2008 Spatial Index Performance

    The institution I work with has decided to migrate their database system to SQL Server 2008. One of the applications uses geospatial data, which consists of millions of rows. I understand that their are indexes that can be used for geospatial data, but have not worked with them. What's the scoop on them?

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  • restricting acces to sites with squid and elinks

    - by Rexxar
    I want to block in elinks the yahoo sites(www.yahoo.com and all his subdomains fr.yahoo.com etc). I tried with squid(squid.conf): acl Badsites dstdomain .yahoo.com http_acces deny Badsites and i wrote in elinks.conf: set.protocol.http.proxy.host = "proxy.host:3128" set.protocol.http.proxy.user = "" set.protocol.http.proxy.passwd = "" and it dosent work. it tells me Host not found on every site i whant to enter. DO you have any idee why it works that way and can you tell me a solution?

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  • ps3 controller failed to pair

    - by Michael Ropy
    I'm trying to pair my ps3 controller with trusty. I've tried this so far: $ sudo sixpair Current Bluetooth master: xx:xx:xx:xx:xx:xx Setting master bd_addr to xx:xx:xx:xx:xx:xx And then I unplug my controller and run this command: $ sixad --start D-Bus setup failed: Name already in use sixad-bin[4843]: started sixad-bin[4843]: sixad started, press the PS button now But when I press the PS button, nothing happens! I've searched a lot in Google and this process works everywhere, but I don't know it doesn't work here...thanks for your help...

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  • SEO Secrets an SEO Specialist Won't Want You to Know About

    The market place for self claimed 'SEO secrets' is littered with shoddy SEO specialists and cowboys trying to push the common information available to anyone with a computer, internet connection, and a search engine. Here's the breaking news people - there is no secret email that Google sends out to these SEO specialists, and they don't keep a stack of top secret documents back just for the lucky few. It just doesn't work like that.

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