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• Webcam doesn't work in Ubuntu 12.10

  - by Kzhi

  I have Gembird cam68ut. On my Ubuntu 12.10 it shows black screen in cheese and guvcview. I tested it in win7, it works fine. Here what I found: It is a uvc compliant camera, I checked on the site: 18ec:3299 USB 2.0 PC Camera (model number QC3231) ArkMicro This webcam is report by lsusb: Bus 001 Device 004: ID 18ec:3299 Arkmicro Technologies Inc. Here is the output of dmesg | tail: uvcvideo: Found UVC 1.00 device USB2.0 PC CAMERA (18ec:3299) uvcvideo: UVC non compliance - GET_DEF(PROBE) not supported. Enabling workaround. input: USB2.0 PC CAMERA as /devices/pci0000:00/0000:00:1a.0/usb1/1-1/1-1.5/1-1.5:1.0/input/input17 usbcore: registered new interface driver uvcvideo USB Video Class driver (1.1.1) When I run cheese (or guvcview), here what I get in terminal: libv4l2: error turning on stream: No space left on device (cheese:11797): cheese-WARNING **: Internal data flow error. I tried it on different usb slots with the same results The Webcam's microphone works, I can record audio with it Guys, any thoughts on what can be done to make it work?

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• SEO With a Linkwheel

  You will be amazed to know that more than 68 % of internet users do not go farther than first page on search results. That means you have to be among the top page ranks to have any business online. If you are not among those listed on the first page of search results, you are missing out on most of the users searching for products, information and content on Google and other search engines. Linkwheel is a wonderful strategy for search engine optimization (SEO). If done well, your search engine rankings will skyrocket in a very short time.

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• What is an acceptable GC frequency for a SlimDX/Windows/.NET game?

  - by Rei Miyasaka

  I understand that the Windows GC is much better than the Xbox/WP7 GC, being that it's generational and multithreaded -- so I don't need to worry quite as much about avoiding memory allocation. SlimDX even has some unavoidable functions that generate some amount of garbage (specifically, MapSubresource creates DataBoxes), yet people don't seem to be too upset about it. I'd like to use some functional paradigms to write my code too, which also means creating objects like closures and monads. I know premature optimization isn't a good thing, but are there rules of thumb or metrics that I can follow to know whether I need to cut down on allocations? Is, say, one gen 0 GC per frame too much? One thing that has me stumped is object promotions. Gen 0 GCs will supposedly finish within a millisecond or two, but if I'm understanding correctly, it's the gen 1 and 2 promotions that start to hurt. I'm not too sure how I can predict/prevent these.

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• Asterisk failing at startup after upgrading to asterisk18

  - by Supratik

  I was using asterisk16 and asterisk16-skypeforasterisk, which was working fine. I have recently upgraded to asterisk18 and asterisk18-skypeforasterisk, after that I am receiving the following error message. Asterisk ended with exit status 1 Asterisk died with code 1. Asterisk could not start! Use 'tail /var/log/asterisk/full' to find out why. When I checked the log I got the following messages. codec_g729a.c: == Found total of 11 G.729 licenses translate.c: empty buf size, you need to supply one Now, if I remove the /var/lib/asterisk/licenses folder it works fine. Can you please tell me what could be the issue here ? Warm Regards Supratik

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• What permissions are needed to do an LDAP bind to an Active Directory Server

  - by DrStalker

  What permissions are needed to perform an LDAP bind to an active directory server? I have a central domain (call it MAIN) that has two-way trusts to domains in other forests (call then REMOTE and FARAWAY) Using MAIN\myaccount as the username and my password I can bind to REMOTE fine, but not to FARAWAY; I get an invalid credentials response 80090308: LdapErr: DSID-0C09030B, comment: AcceptSecurityContext error, data 525, v893 In all other ways the trusts seem to work fine. What permissions do I need to check to figure out why the bind is failing? My understanding is that anyone in AUTHENTICATED USERS should be able to bind to LDAP, but that only seems to hold true for some domaians and not others.

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• Mastering the Art of SEO

  As the name indicates this article is based on one of the very advance concept nowadays which is none other than SEO which stands for Search engine Optimization. Some years back people were concerned only about the main problems or issues of a particular subject matter. But due to the advancements in technology and specifically internet, things have changed a lot. Now each matter is observed and analyzed very deeply and that is the reason that we are getting better results nowadays. One such thing, which has gained the status of universal fame as well, is internet.

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• Separate collision mesh model?

  - by Menno Gouw

  I want to have another go at 3D within XNA. What I have seen from some other games that they just have a separate very low poly model "cage" around the environment model. However I can not find any reference to this. I have not that much experience with XNA 3D either. Is it possible to have this cage within each of my environmental models already? Lets just say I call the mesh within the .FBX wall and col_wall. How would I call to these different meshes within XNA? The player would just have a tight collision cube around. To make it a bit more efficient I will be making divide the map up by cubes and only calculate collision if the player is in it. Question two: I can't find anywhere to do cube vs mesh collision. Is there a method for this? Or perhaps it is possible to build my collision cage out of cubes in the 3D app and on loading of the models in XNA replace them directly by cubes? So I could just do box to box collision which should be very cheap and still give the player the ability to move over ledges on the static models.

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• MySQL will Stop working after being Started

  - by user115343

  i am new to a webserver thing. I use Centmin mod to install nginx + mariaDB to setup small wordpress blog,the first day it is ok,there are nice "hello world" on my box's IP,but today i have checked that mysql is stop working so i immediately start it again but it is stoped again after some minutes! i use this tutorial but still,it will stop after some period here is my log [root@rylai ~]# tail -f /var/log/mysqld.log 120326 16:19:05 [Note] Plugin 'PBXT_STATISTICS' is disabled. 120326 16:19:05 [Note] Plugin 'InnoDB' is disabled. 120326 16:19:06 [Note] Event Scheduler: Loaded 0 events 120326 16:19:06 [Note] /usr/sbin/mysqld: ready for connections. Version: '5.2.10-MariaDB-mariadb107' socket: '/var/lib/mysql/mysql.sock' port: 3306 (MariaDB - http://mariadb.com/) 120326 16:20:36 mysqld_safe Number of processes running now: 0 120326 16:20:36 mysqld_safe mysqld restarted 120326 16:20:39 [Note] Plugin 'ARCHIVE' is disabled. 120326 16:20:39 [Note] Plugin 'FEDERATED' is disabled. 120326 16:20:40 mysqld_safe mysqld from pid file /var/lib/mysql/rylai.pid ended I only access mysql on CLI,didnt install any panel yet

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• sendmail on Ubuntu won't send from www-data user

  - by bumperbox

  I if call mail() function in PHP from webserver (running as www-data) i get an error sending email. If i call the same script from the cmdline logged in as root, then it works If i switch user to www-data and run from the cmdline i get this error message WARNING: RunAsUser for MSP ignored, check group ids (egid=33, want=107) can not chdir(/var/spool/mqueue-client/): Permission denied Program mode requires special privileges, e.g., root or TrustedUser. FAILEDWARNING: RunAsUser for MSP ignored, check group ids (egid=33, want=107) can not chdir(/var/spool/mqueue-client/): Permission denied Program mode requires special privileges, e.g., root or TrustedUser. FAILEDTest Complete$ WARNING: RunAsUser for MSP ignored, check group ids (egid=33, want=107) I am guessing i need to do something in sendmail configuration I have googled for some solutions but have ended up more confused. Can someone let me know what configuration I need to change to fix so i can send from www-data user?

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• Google Webmaster Tools Index dropped to Zero [closed]

  - by Brian Anderson

  Earlier this year I rebuilt my website using ZenCart. Immediately I saw a drop in index status from 59 to 0. I then signed up for Google Webmaster Tools and noticed the Index status took a dramatic drop and has never recovered. I have worked to add content and I know I am not done, but have not seen any recovery of this index since. What confuses me is when I look at the sitemap status under Optimization it shows me there are 1239 submitted and 1127 pages indexed. Most of my pages have fallen off page one for relevant search terms and some are as far back as page 7 or 8 where they used to be on the first page. I have made some changes in the past week to robots.txt and sitemap.xml, but have not seen any improvements. Can anyone tell me what might be going on here? My website is andersonpens.net. Thanks! Brian

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• Filtering serial port io

  - by mr odus

  I am currently working on a project where I communicate with hardware via a com port on its respective pc(win xp or 7) It is a fairly large project and sifting through the log file can be a bit of pain. This is my current setup. I use putty to do the actual serial communication, and write it to a log file. Then using MinGW Msys I filter it using tail -f "puttyLog" | grep -i "search term" Is there a better way to do this? I mean specifically filtering the input in realtime. Not that mine is terrible, but it still involves having to read from a log and sometimes there have been hangups where it will be delayed for a minute or 2. I have used software in the past with a main io window and then internal filter panels, but can no longer remember or find it.

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• Trying to install Proprietory Nvidia Graphics Drivers

  - by Peter Snow

  After reading and trying many different suggestions for some hours, I returned to this how-to: https://help.ubuntu.com/community/BinaryDriverHowto/Nvidia The first problem I encounter is how to identify which of the listed drivers support my Nvidia GEForce 630M graphics card. Following the links doesn't really help, since it is not stated there either (except where support for a new driver was added later which is explicitly stated, but the original devices covered are not). However, even if I knew, if it doesn't appear in the 'Additional Drivers' dialogue (see below), how will I install it? Second Issue: The article goes on to say that available drivers for my hardware are usually listed in 'Additional Drivers'. In my case, they aren't. Unfortunately, it doesn't tell me how to correct that or work around it? I've checked the bios and there is no way offered there to disable the integrated graphics, only the Nvidia graphics. I've also tried each available option in this: $ sudo update-alternatives --config i386-linux-gnu_gl_conf My system is an Acer Aspire 4752G bought May 2012. I'm running Ubuntu 12.04LTS. uname -a : 3.2.0-38-generic-pae #61-Ubuntu SMP Tue Feb 19 12:39:51 UTC 2013 i686 i686 i386 GNU/Linux It's 64bit hardware but I installed 32bit OS for greater software compatibility. Running $ sudo tail -fn 500 /var/log/Xorg.0.log | grep '(EE)' returns" (WW) warning, (EE) error, (NI) not implemented, (??) unknown. [ 28.886] (EE) Failed to initialize GLX extension (Compatible NVIDIA X driver not found) The reason for wanting the proprietor y drivers is because my laptop comes with 3D accelerated graphics adaptor and so rather than confining myself to struggling with the on-board graphics, I would rather use it. I also want to experiment with using it for bitmining (which uses the GPU's for computing power).

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• google webmaster showing 6 pages submitted 0 indexed, yet i can see them all there when i search in google?

  - by sam

  I have a small 'brochure' type site with 6 pages, i can see them all the pages showing up in google when i search for my site. But in webmaster tools under the sitemaps section it says 6 submitted, (the blue bar of the graph), but the indexed pages - the red bar is showing 0 indexed pages, even though they seem to be indexed ? any idea why this is ? I dont really think its that important as the pages are still indexed, but it just seems odd. =================================================== UPDATE 9/3/12 having just looked in google webmaster its showing that there are 11 pages indexed, under the health index status tab.. but under the optimization sitemap tab it shows 6 urls submitted but only 1 indexed ? please see images bellow index status: Sitemap status:

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• Google I/O 2012 - Breaking the JavaScript Speed Limit with V8

  Google I/O 2012 - Breaking the JavaScript Speed Limit with V8 Daniel Clifford Are you are interested in making JavaScript run blazingly fast in Chrome? This talk takes a look under the hood in V8 to help you identify how to optimize your JavaScript code. We'll show you how to leverage V8's sampling profiler to eliminate performance bottlenecks and optimize JavaScript programs, and we'll expose how V8 uses hidden classes and runtime type feedback to generate efficient JIT code. Attendees will leave the session with solid optimization guidelines for their JavaScript app and a good understanding on how to best use performance tools and JavaScript idioms to maximize the performance of their application with V8. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 3049 113 ratings Time: 47:35 More in Science & Technology

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• Sensor based vs. AABB based collision

  - by Hillel

  I'm trying to write a simple collision system, which will probably be primarily used for 2D platformers, and I've been planning out an AABB system for a few weeks now, which will work seamlessly with my grid data structure optimization. I picked AABB because I want a simple system, but I also want it to be perfect. Now, I've been hearing a lot lately about a different method to handle collision, using sensors, which are placed in the important parts of the entity. I understand it's a good way to handle slopes, better than AABB collision. The thing is, I can't find a basic explanation of how it works, let alone a comparison of it and the AABB method. If someone could explain it to me, or point me to a good tutorial, I'd very much appreciate it, and also a comparison of the advantages and disadvantages of the two techniques would be nice.

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• Languages with a clear distinction between subroutines that are purely functional, mutating, state-changing, etc?

  - by CPX

  Lately I've become more and more frustrated that in most modern programming languages I've worked with (C/C++, C#, F#, Ruby, Python, JS and more) there is very little, if any, language support for determining what a subroutine will actually do. Consider the following simple pseudo-code: var x = DoSomethingWith(y); How do I determine what the call to DoSomethingWith(y) will actually do? Will it mutate y, or will it return a copy of y? Does it depend on global or local state, or is it only dependent on y? Will it change the global or local state? How does closure affect the outcome of the call? In all languages I've encountered, almost none of these questions can be answered by merely looking at the signature of the subroutine, and there is almost never any compile-time or run-time support either. Usually, the only way is to put your trust in the author of the API, and hope that the documentation and/or naming conventions reveal what the subroutine will actually do. My question is this: Does there exist any languages today that make symbolic distinctions between these types of scenarios, and places compile-time constraints on what code you can actually write? (There is of course some support for this in most modern languages, such as different levels of scope and closure, the separation between static and instance code, lambda functions, et cetera. But too often these seem to come into conflict with each other. For instance, a lambda function will usually either be purely functional, and simply return a value based on input parameters, or mutate the input parameters in some way. But it is usually possible to access static variables from a lambda function, which in turn can give you access to instance variables, and then it all breaks apart.)

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• Le SEO en 10 minutes, Google donne ses recettes pour optimiser le référencement d'un site Web

  Le SEO en 10 minutes Google donne ses recettes pour optimiser le référencement d'un site Web Google vient de publier une vidéo de 10 minutes qui explique les bases du SEO (search engine optimization) pour les startups. L'optimisation d'un site Web pour les moteurs de recherche tout en respectant les recommandations de Google peut être un véritable défi pour les entreprises. Maile Ohye, Google Developer Advocate, donne en 10 minutes, les recettes pour optimiser un petit site de moins de 100 pages dans la vidéo « SEO for startups in under 10 minutes ». Les concepts clés de l'optimisation du référencement de son site y sont évoqués comme la redirection, la str...

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• How to restrict access to a specific wireless network to only 1 user profile in Windows 7.

  - by Mathlight

  Hi all, I'm using Win7 SP1. I've got multiple users on the laptop that can / must connect to a wireless network, lets call it Wireless1. I've got an second wireless network, (lets call it Wireless2), which I want to limit access to only the admin user of the laptop. Now I can remove Wireless2 in the network manager every time, but i want a more user friendly solution, so that only the admin can connect to Wireless2, and all the other users cannot ( they may see the network, but must enter the password, like all other networks ). Any ideas?

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• Loked out: Windows 8.1 administrator account disabled

  - by Gregory MOUSSAT

  I installed a Windows 8.1 laptop. By default the Administrator account is disabled. During the install process, the user created belongs to the administrators group (call it FirstUser). I installed various softwares, I created a normal account for the user (call it RealUser), and I mistakenly deleted FirstUser account (while I was connected under this account). I rebooted and... oh well, I understood the mistake. I no longer have access to any administrative privileges. The laptop is still in workgroup. I tested with Offline Windows Password & Registry Editor (latest version): activated Administrator account, and blancked its password (no option to set a new one) gave RealUser account administrative privileges After reboot, only RealUser account is still available. Once logged in, I'm unable to access anything requiring administrative provileges. Does anyone know a way to successfully activate the Administrator account, or whatever ?

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• Computers on preexisting Windows 2008 domain accepting accounts from Samba3/4 domain

  - by Ivan Vucica

  I have a web application written in PHP where I would like to allow existing users to log into Windows computers, too. Re-hash of their passwords is doable (by requesting them to change the password). And to solve desync of passwords, I intend to have webapp authenticate users primarily against the domain. I don't want to give webapp users accounts on the existing domain, which we can call example.local. Instead, I want to provide them accounts on a new domain, let's call it webapp.example.local. From some research I have done, setting up a Samba4 domain and joining computers into this webapp.example.local domain would be one way to allow webapp users to log in. But, the computers should be members of the example.local domain. How can I get computers that are members of and are authenticating against Windows 2008-based example.local to also authenticate users against webapp.example.local? Magic keywords seem to be "trust relationship", "forest", etc, but at this point I haven't found a concrete example on how to establish this trust.

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• Error: kernel headers not found. (But they are in place)

  - by Guandalino

  I'm trying to install the Guest Additions in VirtualBox 4.04. Host OS is Ubuntu desktop 11.04 64bit, guest OS is Ubuntu server 11.10 64bit. $ sudo ./VBoxLinuxAdditions.run After some output this line is printed: The headers for the current running kernel were not found. But the headers are installed, at least accordingly to dpkg: $ dpkg --get-selections | grep linux-headers linux-headers-3.0.0-12 install linux-headers-3.0.0-12-server install linux-headers-server install The running kernel is: $ uname -a Linux foobar 3.0.0-12-server #20-Ubuntu SMP Fri Oct 7 16:36:30 UTC 2011 x86_64 x86_64 X86_64 GNU/Linux How do I fix things so that Guest Additions installer is able to find kernel headers? Update: added full output. The headers for the current running kernel were not found. If the module compilation fails then this could be the reason. Building the main Guest Additions module ...done. Building the shared folder support module ...fail! (Look at /var/log/vboxadd-install.log to find out what went wrong) Installing the Window System drivers ...fails! (Could not find the X.Org or XFree86 Window System). I don't care for fail #2, because that's a server and I don't need X server. But I need shared folder support. Some further detail: $ tail /val/log/vboxadd-install.log .......... cc1: some warnings being treated as errors make[2]: *** [/tmp/vbox.0/vfsmod.o] Error 1 make[1]: *** [_module_/tmp/vbox.0] Error 2 make: *** [vboxsf] Error 2

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• Test-Driven Development with plain C: manage multiple modules

  - by Angelo

  I am new to test-driven development, but I'm loving it. There is, however, a main problem that prevents me from using it effectively. I work for embedded medical applications, plain C, with safety issues. Suppose you have module A that has a function A_function() that I want to test. This function call a function B_function, implemented in module B. I want to decouple the module so, as James Grenning teaches, I create a Mock module B that implements a mock version of B_function. However the day comes when I have to implement module B with the real version of B_function. Of course the two B_function can not live in the same executable, so I don't know how to have a unique "launcher" to test both modules. James Grenning way out is to replace, in module A, the call to B_function with a function pointer that can have the value of the mock or the real function according to the need. However I work in a team, and I can not justify this decision that would make no sense if it were not for the test, and no one asked me explicitly to use test-driven approach. Maybe the only way out is to generate different a executable for each module. Any smarter solution? Thank you

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• Can't mount home after trying to resize (bad geometry: block count exceeds size of device).

  - by Lynn

  This is on a fresh computer (super computer actually). It got to me with 15T on the home mount and 50G on the root. I tried allocating 7T to root and resizing (since I'm putting a local yum repo on this machine as it has no internet access nor will it ever). I tried following the instructions here: Centos 6.3 disk space allocation but something went wrong and the home won't mount again. Instead I get from dmesg | tail: EXT4-fs (dm-2): bad geometry: block count 4294967295 exceeds size of device (1342177280 blocks) df -h nets this output: Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup-lv_root 7.0T 3.6G 6.6T 1% / tmpfs 190G 216K 190G 1% /dev/shm /dev/sda1 485M 38M 422M 9% /boot I didn't have any files on /dev/mapper/VolGroup-lv_home. Will simply running mke2fs fix it to be mountable? What sort of options should I run it with. I've never resized volumes before or used mke2fs. I don't want to make this mess worse.

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• tcp handshake failed.client send rst (after syn-ack). can any one advice?

  - by user1495181

  architecture: 2 linux computer connected . on the second (192.168.1.1) one run apache server . I have a small program that take tcp packets from nfqueue change the dst ip to 192.168.1.1 in case that the dst ip is 192.168.1.2 (i know that i can do it with iptables , but my program will do more things in the future), fix check sum and return to the queue. if i call to telnet 192.168.1.1 , means that my program dosnt need to do any manipulation, handshake is OK. If i call to telnet 192.168.1.2 , my program change the dest. server get the syn and return syn-ack, but right after getting the syn-ack the client send rst. Can anyone advice? wireshark of the telnet tcpdump of the telenet above

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• how to "think in templates", i.e. how to know that a problem can be solved using templates and how to adapt to it?

  - by sap

  I decided to improve my knowledge of template meta-programming, i know the syntax and rules and been playing with counteless examples from online resources. i understand how powerfull templates can be and how much compile time optimization they can provide but i still cant "think in templates", that is, i cant seem to know by myself if a certain problem could best be solved with templates (instead of something else) and if it can, how to adapt that problem to templates. so what im asking is, is there some kind of online resource or maybe book that teaches how to identify problems that could best be solved with templates and how to adapt that problem. basically i want to learn to "think in templates". already asked on stackoverflow but once again people just redirected me to resources on how to use templates, when im really asking is how to know when to use template meta-programming and how to adapt that problem to templates. thanks in advance.

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