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• Removing a module when I add a new better one?

  - by yinon

  I'm using this guide to install my TL-WN822N (Wireless/Wifi). I need to add 8192cu at the end of /etc/modules, but I see another module there (Copy-Paste file): # /etc/modules: kernel modules to load at boot time. # # This file contains the names of kernel modules that should be loaded # at boot time, one per line. Lines beginning with "#" are ignored. # Parameters can be specified after the module name. lp 8192cuvhba vhba Should I remove it or is that unnecessary? Thanks for any help!

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• Google I/O 2012 - How we Make JavaScript Widgets Scream

  Google I/O 2012 - How we Make JavaScript Widgets Scream Malte Ubl, John Hjelmstad When loading websites every millisecond counts. Social widgets should enhance a website experience and they should definitely not slow it down. We'll walk through the unique challenges of loading social widgets such as the +1 button and how we made sure that they load as fast as possible -- yes, there will be war stories! While we'll focus on widget performance, many of the techniques we used have wider applicability and we'll show how they can make your website faster, too. For all I/O 2012 sessions, go to developers.google.com From: GoogleDevelopers Views: 734 3 ratings Time: 51:44 More in Science & Technology

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• How to get past black screen with mouse icon while installing on Gateway MX6920?

  - by tom kruse

  I have an old Gateway MX6920 laptop that got a virus on its hard drive so I put in a new one from another laptop. When i turn it on it tries to load Windows but fails so I'm going to try to put Ubuntu on it (because I heard it's a good OS). I downloaded the 32-bit desktop version of Ubuntu and burned it to a CD. I put the CD in the computer, went to the boot menu, and selected CD-ROM. The computer tries to boot but stops at a black screen with a mouse icon sitting in the middle of the display. I have no idea what's going on, so please help.

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• NHibernate Pitfalls: Private Setter on Id Property

  - by Ricardo Peres

  Having a private setter on an entity’s id property may seem tempting: in most cases, unless you are using id generators assigned or foreign, you never have to set its value directly. However, keep this in mind: If your entity is lazy and you want to prevent people from setting its value, make the setter protected instead of private, because it will need to be accessed from subclasses of your entity (generated by NHibernate); If you use stateless sessions, you can perform some operations which, on regular sessions, require you to load an entity, without doing so, for example: 1: using (IStatelessSession session = factory.OpenStatelessSession()) 2: { 3: //delete without first loading 4: session.Delete(new Customer { Id = 1 }); 5:  6: //insert without first loading 7: session.Insert(new Order { Customer = new Customer { Id = 1 }, Product = new Product { Id = 1 } }); 8:  9: //update without first loading 10: session.Update(new Order{ Id = 1, Product = new Product{ Id = 2 }}) 11: }

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• Can I copy large files faster without using the file cache?

  - by Veazer

  After adding the preload package, my applications seem to speed up but if I copy a large file, the file cache grows by more than double the size of the file. By transferring a single 3-4 GB virtualbox image or video file to an external drive, this huge cache seems to remove all the preloaded applications from memory, leading to increased load times and general performance drops. Is there a way to copy large, multi-gigabyte files without caching them (i.e. bypassing the file cache)? Or a way to whitelist or blacklist specific folders from being cached?

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• Slow writing HDD speed, Ubuntu 12.04 64-bit, Thinkpad T520i

  - by pyc

  It seems that (but I'm not completely sure), that when I'm copying files from gigabit network to HDD, I can't use full potential of the network which in my case is about 60 MB/s, because HDD writing is so slow like lower than 10 MB/s, and also it's slowing down the whole system which becomes pretty much unresponsive, almost impossible to work with. Copying files to samba share residing at Ubuntu machine, connected to share from Windows 7, I'm completely sure my network equipment is OK, and there's no CPU intensive process on Ubuntu except smbd getting about 10-20% from time to time which I think is OK. Something here is burried deep I think, maybe even in kernel. Already tried to switch from AHCI to compatibility mode, and turning acpi on and off - nothing helped. So it's like HDD buffer is full and emptying slowly while machine is sluggish, load is about 3 to 4. Somebody experienced the similar problems? Some help on troubleshooting process and identifying the cause would be helpful too :) Thanks!

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• What are the key "connectors" for animation creation?

  - by qaisjp

  I'm creating an animation "engine" for a 2D game which loads a *.2dped file to load a character (it's body part positions, height, length of arm etc), and then a *.2difp to manipulate the body part positions. I'd like to know what the key body parts (bones, I mean) I should allow to be manipulated. My current list, sorted by ID's: 1: BONE_PELVIS1 2: BONE_PELVIS 3: BONE_SPINE1 4: BONE_UPPERTORSO 5: BONE_NECK 6: BONE_HEAD2 7: BONE_HEAD1 8: BONE_HEAD 21: BONE_RIGHTUPPERTORSO 22: BONE_RIGHTSHOULDER 23: BONE_RIGHTELBOW 24: BONE_RIGHTWRIST 25: BONE_RIGHTHAND 26: BONE_RIGHTTHUMB 31: BONE_LEFTUPPERTORSO 32: BONE_LEFTSHOULDER 33: BONE_LEFTELBOW 34: BONE_LEFTWRIST 35: BONE_LEFTHAND 36: BONE_LEFTTHUMB 41: BONE_LEFTHIP 42: BONE_LEFTKNEE 43: BONE_LEFTANKLE 44: BONE_LEFTFOOT 51: BONE_RIGHTHIP 52: BONE_RIGHTKNEE 53: BONE_RIGHTANKLE 54: BONE_RIGHTFOOT It's currently made to support real people, but am I going too accurate for a 2D character?

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• Ubuntu 13.10 gets stuck on boot

  - by Robert frost

  I have updated (via the Software Updater) Ubuntu 13.04 to Ubuntu 13.10. After it had finished the installation, the system required a reboot. When I reboot and load Ubuntu it will get stuck on the logo. I managed to boot into the recovery (both console and graphics mode) but I can't figure out how to repair it. I have tried a sudo update-grub, but nothing different happened. I have also tried sudo apt-get install gnome, but the same result... I am using a dual-boot Win7 + Ubuntu.

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• Azure Florida Association: Modern Architecture for Elastic Azure Applications

  - by Herve Roggero

  Join us on November 28th at 7PM, US Eastern Time, to hear Zachary Gramana talk about elastic scale on Windows Azure. REGISTER HERE: https://www3.gotomeeting.com/register/657038102 Description: Building horizontally scalable applications can be challenging. If you face the need to rapidly scale or adjust to high load variations, then you are left with little choice. Azure provides a fantastic platform for building elastic applications. Combined with recent advances in browser capabilities, some older architectural patterns have become relevant again. We will dust off one of them, the client-server architecture, and show how we can use its modern incarnation to bypass a class of problems normally encountered with distributed ASP.NET applications.

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• Question about mod_rewrite rule for redirecting failing pages

  - by SimpleCoder

  I'm setting up a mod_rewrite rule that redirects failing pages to a custom Page Not Found page. This is with Wordpress. I'm using the guide here: http://httpd.apache.org/docs/2.2/rewrite/rewrite_guide_advanced.html#redirect404. My rule so far looks like this: RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.+) http://example.com/?page_id=254 [R] This works. It seems to be a combination of the first and second suggestion that worked, since the -U flag did nothing. My question is, out of curiosity why the following happens: When I change REQUEST_FILENAME to REQUEST_URI (as the second example suggests), the page loads, but none of the style sheets load. All of my formatting is gone, and this happens on every page. Can anyone think of why this might happen?

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• Boots to a totally blank screen after I installed some ATI Radeon card updates

  - by baboonWorksFine

  I am using Ubuntu 10.04 LTS, dual boot with win7 on ThinkPad T400, I followed Ubuntu update hints and installed some update for my ATI Radeon graphic card, but when I boot to Ubuntu(means I can still load GRUB), the tragedy happened, the screen goes to blank and no matter what key stroke, I can not get any responds, I try to go to text terminal, but impossible! However when I hit the power button, the computer would pop out the Ubuntu shutdown screen briefly and shut down. I figure out I should delete the updates package of my graphic card, but I don't even get a chance to go to text terminal, please help me!

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• Not enough space left in the hard drive. How to proceed?

  - by jimbobjgr

  Where do I begin... I can hardly do anything on Ubuntu 12.04. I am very close to removing and returning to Windows. First I could not load it because the graphics appeared to be running low but somehow that stopped happening and I could log on. Now I can not download anything or I get this message Cannot write: No space left on device. I tried trouble shooting this issue but every time I try and fix the problem I am blocked by this message E: Write error - write (28: No space left on device) E: Can't mmap an empty file E: Failed to truncate file - ftruncate (9: Bad file descriptor) E: The package lists or status file could not be parsed or opened. $ OLD=$(ls -tr /boot/vmlinuz-* | head -n -2 | cut -d- -f2- | awk '{print "linux-image-" $0}') Ubuntu is also running incredibly slow and I cant get anything done! Please help this is driving me mad!

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• How can I fix the iptables error message "unable to initialize table 'filter'"?

  - by user3215

  When I try to use iptables command on one of my Rackspace cloud server, I'm getting the following error. In an attempt to apply iptables rules with iptables-apply -t 120 /etc/iptables.rules and iptables-restore < /etc/iptables.rules I got the next error: FATAL: Could not load /lib/modules/2.6.35.4-rscloud/modules.dep: No such file or directory iptables-restore v1.4.4: iptables-restore: unable to initialize table 'filter' Error occurred at line: 2 Try `iptables-restore -h' or 'iptables-restore --help' for more information. How do I fix this?

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• How can I make a collection of mini-games in XNA where the user can download packs of minigames and the main .exe can run them without being altered?

  - by Pyroka

  I'm currently making a PC game in XNA. It's actually a collection of mini-games (there's 3 mini-games at the moment) however I plan to make and add more, in downloadable 'packs'. My question is, what's the best way to achieve this? Currently my thoughts are: Create a 'game' interface Build games to this interface but create them as .dlls Have the main .exe file scan a directory and load in the .dlls at runtime. I've not messed around with the idea much, but I know there are applications at-least that use this plug-in approach (Notepad++ seems to), but I'm not sure of any games that do (although I'm sure they must exist). However it seems that this is a problem that has been solved previously, so I'm wondering if there's any form of established best-practice.

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• Writing a spell checker similar to "did you mean"

  - by user888734

  I'm hoping to write a spellchecker for search queries in a web application - not unlike Google's "Did you mean?" The algorithm will be loosely based on this: http://catalog.ldc.upenn.edu/LDC2006T13 In short, it generates correction candidates and scores them on how often they appear (along with adjacent words in the search query) in an enormous dataset of known n-grams - Google Web 1T - which contains well over 1 billion 5-grams. I'm not using the Web 1T dataset, but building my n-gram sets from my own documents - about 200k docs, and I'm estimating tens or hundreds of millions of n-grams will be generated. This kind of process is pushing the limits of my understanding of basic computing performance - can I simply load my n-grams into memory in a hashtable or dictionary when the app starts? Is the only limiting factor the amount of memory on the machine? Or am I barking up the wrong tree? Perhaps putting all my n-grams in a graph database with some sort of tree query optimisation? Could that ever be fast enough?

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• SEO Impact of using Responsive Design and the serving of different content on the same URL

  - by bmenekl

  We are currently working on redesigning our site and making it responsive. It is a search intensive site with complex functionality, a lot of search filters and a lot of content. Our mobile versions of certain pages need to hide some functionality (i.e. search filters) that exists in the desktop version and/or content (mainly blocks of text that are not necessary or are increasing page load in mobile devices). My questions is this: does the situation of having the same URL (responsive site) serving slightly different content (text and/or search filters) for certain pages in different devices affect our SEO (SERPs or otherwise)?

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• ubuntu 12.04 can't find root partition (it doesn't look for btrfs partitions) end up with kernel-panic [closed]

  - by zalesz

  Possible Duplicate: There's an issue with an Alpha/Beta Release of Ubuntu, what should I do? I'm running Ubuntu 12.04 from kernel v. 3.2.0-17 with all partitions formatted as BTRFS. It was everything ok till kernel 3.2.0-18/19. Now system don't load, after trying to run it with recovery there is a msg that kernel panic occurred cause there is no partition with ext3/4 and some other partitions but I don't see any btrfs alike type. Any ideas how to fix it? Best

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• unable to display index.php

  - by user1683645

  I'm trying to load a website I've development and transferred from windows to ubuntu. I've installed apache2/php5/mysql and I've confirmed that it works by using the default index.html file displaying something like "It Works!". I've also created arbitrary folder containing some php file that I've run in firefox and it was displayed. But when I try to run my projects index.php I get a blank screen. I've consulted mirc about this and they say that it has to do with file permission. I've chcked the file permission on my index.php file and it is owner : rw r , group : r, others : read-only and execute is unchecked. What am I doing wrong?

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• Dual boot windows 8.1 acer V3-571G with Ubuntu 13.10

  - by tara512

  I am trying to dual boot my acer which came with windows 8 pre-installed. I tried using the tutorial here doing it the simple way but when I load Ubuntu from my transcended flash drive it says that there is no other operating system installed. I tried partitioning my hard drive but I seem to have 3 recovery partitions and even though I have 485GB free I can only allocate 100GB to the new partition. I would like to have most of my hard drive allocated to Ubuntu and just use the windows for programs like microsoft office.

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• Computer Freezes After GRUB

  - by paulmcg421

  Ok so I've just built my first computer and have got it running, here are the specs: Asus P8Z68-V PCI-E LX Motherboard, Intel Core i5-2500K, Patriot Memory 8GB (2 x 4GB), Viper Xtreme Series PC3-15000 1866MHz CL9 Division 2 Edition Memory (PXD38G1866ELK), Gigabyte ATI Radeon 6850 820MHz 1GB PCI-E HDMI OC Windforce 2x 500w Ezcool 24pin psu as standard. The only thing I haven't bought new is the hard drive, it's a 250gb that I removed from an Acer Aspire M5100 that I was using till now with no OS Problems. On start up it runs fine but is unresponsive after the GRUB menu disappears to load Ubuntu (Oneric Ocelot). The keyboard lights then turn off and the screen eventually returns that there is no signal. Is there anything that I could be missing from building? (This is my first attempt at building my own PC) Any input would be appreciated, thanks !

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• Microphone doesn't give any input, yet music does

  - by user52643

  I've tried a few guides but nothing works as of yet. I've tried two microphones, both of which work on my Vista setup but do nothing on Ubuntu. Nothing is on mute both on the Sound utility or Skype (which I'm trying to use my mic for). I've been informed that when my speakers are playing very load, this can be heard on the other end of a call, too. See link for cat /proc/asound/card0/codec#0 results which are apparently relevant... _' N.B. I am noob x

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• How to improve Unity Performance?

  - by Wolter Hellmund

  I installed ubuntu netbook edition on my netbook* expecting to get the best performance out of it, but apparently, that didn't turn out. Unity is a bit slow on it, and when I click on Files and folders it takes a while to load the respective interface and the bar at the top disappears and then loads in. Is this expected? Is there anything I can do to improve the performance? Is this problem specific to my netbook? *Netbook info: Acer - Aspire One 1.6 GHz Intel Atom Processor 1 GB RAM Memory Intel GMA 950 graphics card

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• Got problem with installation. "No root file system is defined."

  - by user92322

  I'm very new with Ubuntu and generally with linux. I saw ubuntu and it seems like this OS is really good and stable, and so I decided to install it alongside my windows 7 OS. I have a few problems with the installation. Here is what I did: I downloaded the 64bit version from Ubuntu official website, and burned it on a dvd. I set the boot sequence to first load from my CD-Rom. Ubuntu installation started, and I chose "Install Ubuntu" in the menu. (where there is also a "Try Ubuntu" option) I clicked forward until I got into the installation type screen As you can see, the installation wont show my actual details about my hard drive! I have 1 hard drive with 750 GB - 80 GB - My main drive with windows 7 OS 600GB - All of my stuff 20GB Free space that I saved for Ubuntu But the installation wont show that!

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• How can I write data to a file that users can't easily edit?

  - by ThePlan

  While working on game saving and loading I figured I could just write all the variable values to a file and then load that file from it's default location anytime. However from the very beginning it sounded like an odd job. I know about serialization and boost, but that seems so complicated, I figured I'd keep it simple, but I've ran across this huge issue: No matter what file I can write with C++, the user can get their hands on it, they can edit their position, they can remove a boss, or add new weapons for themselves. My question here is: How can I create a file in C++ which cannot be editted or openned with a text editor such as Notepad (I'm not trying to make a file which is impossible to open, but a file which will give the user a headache if he tries to edit it through usual methods.)

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• Upstart Script: Detect Shift Key Down At Boot

  - by bambuntu

  I want to create a boot up potential which allows a different upstart/runlevel configurations to load based upon specific key downs at boot (or combos). How do I detect a key down event with an upstart script? I'm offering a bounty. The deal is you must provide a very simple piece of working code to do this. I will immediately check the code and verify that it works. I'm on 10.04 if that helps. Alternative methods to achieve the same result are acceptable, i.e., if grub could somehow show entries that would indicate a type of boot, where that boot would cp appropriate files to /etc/init. So, instead of a keydown solution, it would be a boot menu item solution and the way to get grub to copy upstart scripts to /etc/init. If possible.

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