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• New on the Java Channel: Low-Latency Applications, JavaFX on Raspberry PI, and more

  - by terrencebarr

  If you haven’t checked out the Java YouTube channel lately … here is some of the stuff you’re missing: Understanding the JVM and Low Latency Applications (picture) JavaFX on the Raspberry Pi 55 New Java 7 Features: Part 3 – Concurrency Properties and Binding with JavaFX 2 Intro And something fun & cool: Java @ Maker Faire 2012 Much more on the Java Channel. Enjoy! Cheers, – Terrence Filed under: Mobile & Embedded Tagged: Embedded Java, Java 7, Java Channel, Java Embedded, JavaFX, Maker Faire, Raspberry Pi, video, webcast, YouTube

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• Best criteria for choosing a DNS provider : Redundancy, Locations, Cost, IPV6, Reliability

  - by antoinet

  What criteria should I use to choose a good DNS provider? Redundancy - Your DNS service should use at least 4 nameservers. You should also check for the use of anycast servers such as Amazon Route 53 and dyn.com services. Worldwide server location - Servers shall be located worldwide, not just in one country! Ipv6 support - It shall be possible to declare an AAAA entry to your server if it supports IPV6 Cost is of course an issue. Some service are free, Amazon Route 53 seems quite cheap. Reliability : SLA is also important, it demonstrate that reliability is measured. Your dns provider shall then state for a refund in case a failure is encountered. Anything else? For reference, a couple of links for more information: http://serverfault.com/questions/216330/why-should-i-use-amazon-route-53-over-my-registrars-dns-servers http://aws.amazon.com/route53/ http://dyn.com/dns/

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• Low disk space: home/user folder occupies 94GB

  - by tedtoy

  I am low on disk space and when I check the Disk Usage analyzer (using gksudo baobab) it indicates that my home/teddy folder is using 94GB, but when I browse through its contents I can only account for about 1gb of that usage. I've tried sudo apt-get clean and deleting the cached package files from Synaptic Package Manager, emptied trash but that has not changed the amount of free space I have. It seems similar to this problem But using the root disk usage analyzer has not given any insight into what is consuming so much space. Any ideas?

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• Often "running in low-graphics mode” with NVidia GeForce GT 430

  - by user42228

  Often (every fifth time perhaps) when I turn on my system, I'm greeted with the "running in low-graphics mode” window. Sometimes all I have to do is reboot and the system will start correctly, sometimes there can be a longer series of failed starts. If I go to the terminal and log in, I can run startx and my desktop will appear without problems. At the end of /var/log/Xorg.1.log I see this: [ 77.459] (EE) Screen(s) found, but none have a usable configuration. [ 77.459] Fatal server error: [ 77.459] no screens found [ 77.459] Please consult the The X.Org Foundation support at http://wiki.x.org Is the NVidia creating the appropriate XOrg configuration dynamically on every boot, or what could explain that the configuration error above only occurs sometimes?

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• New Year's Resolution: Highest Availability at the Lowest Cost

  - by margaret.hamburger(at)oracle.com

  Don't miss this Webcast: Achieve 24/7 Cloud Availability Without Expensive Redundancy Event Date: 01/11/2011 10:00 AM Pacific Standard Time You'll learn how Oracle's Maximum Availability Architecture and Oracle Database 11g help you: Achieve the highest availability at the lowest cost Protect your systems from unplanned downtime Eliminate idle redundancy Register Now! var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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• Wireless iwconfig rate auto too low

  - by Jamie Kitson

  Hi, left to its own devices my wireless connects at too low a speed. I have a 20meg internet connection and my wireless is slowing it down to like 3meg. When I reboot into windows it's fine. When I run iwconfig eth1 rate 24M or even 48M the connection is much faster and runs fine, why won't it automatically go higher? Is this the fault of the driver? I am running Broadcom's driver compiled from source. Would adding iwconfig eth1 rate 24M to rc.local be the right way to force it at boot? Output from iwconfig when rate=auto: eth1 IEEE 802.11 ESSID:"honeypot" Mode:Managed Frequency:2.417 GHz Access Point: xxx Bit Rate=1 Mb/s Tx-Power:24 dBm Retry min limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=5/5 Signal level=-47 dBm Noise level=-91 dBm Rx invalid nwid:0 Rx invalid crypt:2 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0 Thanks, Jamie

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• Laptop battery fails to change unless power level very low, and then dicharges quickly

  - by dana

  I've had my laptop for about 5-6 weeks. Its a DELL Alienware M15x and I have never replaced the battery,such as http://www.pcbatteria.com/dell-alienware-m15x-series.html. The past 3 weeks or so the battery can only charge when the computer is off or in a low power state. If its on and plugged in it will still lose its charge unless its already at 100%. On a full charge without being plugged in it only holds its charge for about 1 hour on "power saver". This makes it extremely hard to use it as a portable device so i'm trying to find a way to troubleshoot the problem without having to buy a new battery or laptop. Unfortunately I need it for the next few months in some of my classes so its kind of urgent. Thanks for your help!

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• Low graphics mode on Ubuntu 12.04 with Intel Graphics

  - by NightShadeQueen

  When I boot, my computer just tells me it can't detect graphic card (or something else) settings and it has to use the low graphics mode. Then it gives me four choices, but doesn't let me choose any of them. I can get my computer to boot by going to some sort of terminal mode and then typing sudo gdm. The other graphics manager I have is lightdm. I originally had the nVidia propriety driver, and I've tried bumblebee. Mobile Intel Graphics Media Accelerator 4500M is my graphics card. Is there any way to fix this so I can use lightdm again?

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• Free or Low Cost Web Hosting for Small Website [duplicate]

  - by etangins

  This question already has an answer here: How to find web hosting that meets my requirements? 5 answers I have a small website (between 2000 and 10000) page-views a day. I'm looking for a free or low cost web host. I tried 50webs.com but their server breaks down. So as not to cause debate, I am also just looking for links to good information sources for web hosting if just finding a good web host is too general. I currently only use HTML, CSS, and JavaScript though I'm considering learning PhP and other more advanced languages to step up my game.

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• Low "time on site" and high bounce-rate in Japan

  - by Noam

  I'm seeing a substantially low "time on site" and high bounce rate from visitors coming from Japan. Comparing to other states, even in languages I don't speak, the stats are still dramatically worse. So I assume there's something specific to that nation, that I should understand in order to make their experience better. The content they are seeing is in Japanese, and I've also translated the head-lines, which to my surprise didn't make stats look better. The site doesn't have a mobile version, so I assume that might be part of the problem. Wanted to hear from your experience what other reasons might there be that are specific for Japan. UPDATE: The content itself was in Japanese all the time, that's the reason it attracts users from Japan. The head-lines were in English, so I only changed them.

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• The cost of longer delay between development and QA

  - by Neil N

  At my current position, QA has become a bottleneck. We have had the unfortunate occurence of features being held out of the current build so that QA could finish testing. This means features that are done being developed may not get tested for 2-3 weeks after the developer has already moved on. With dev moving faster thean QA, this time gap is only going to get bigger. I keep flipping through my copy of Code Compelte, looking for a "Hard Data" snippet that shows the cost of fixing defects grows exponentially the longer it exists. Can someone point me to some studies that back up this concept? I am trying to convince the powers that be that the QA bottleneck is a lot more costly than they think.

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• The practical cost of swapping effects

  - by sebf

  I use XNA for my projects and on those forums I sometimes see references to the fact that swapping an effect for a mesh has a relatively high cost, which surprises me as I thought to swap an effect was simply a case of copying the replacement shader program to the GPU along with appropriate parameters. I wondered if someone could explain exactly what is costly about this process? And put, if possible, 'relatively' into context? For example say I wanted to use a short shader to help with picking, I would: Change the effect on every object, calculting a unique color to identify it and providing it to the shader. Draw all the objects to a render target in memory. Get the color from the target and use it to look up the selected object. What portion of the total time taken to complete that process would be spent swapping the shaders? My instincts would say that rendering the scene again, no matter how simple the shader, would be an order of magnitude slower than any other part of the process so why all the concern over effects?

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• Dealing with blackhat SEO companies and low quality link building competitors [closed]

  - by Mikko Ohtamaa

  I have often faced a case where the competitors of my client use SEO blackhat tactics where they contact a SEO company to do link building for their websites and products. Here is an example of a typical case of a fake blog created only for link building purposes A very low content article http://marshallfab.com/fundus-camera-explained.html in obvious fake blog: no author information, partially machine generated text, all blog posts are solely about link building Following the link you get to the promoted company page http://www.patternless.com/ ... which, unsurprisingly, links the SEO company homepage in the footer text http://www.affordableseofl.com/ ... who are not shy to advertise their Extremely aggressive SEO plan Does Google have any feedback channel where one could submit cases like this, so that Google would punish the link builders? Are there any means to bring these blackhat companies to pushame to damage their reputation?

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• Switching to Kubuntu results in low graphics mode

  - by HackToHell

  I looked at some screen shots of Kubuntu and I liked it so I went to Synaptic and installed the kubuntu-desktop package and set my desktop window manager to kde and rebooted. After reboot, I saw Kubuntu splash screen then this message; running in Low Graphical Mode. Then I was not able to dismiss the message because my mouse did not work Seemingly How to Geek had the same problem http://www.howtogeek.com/howto/ubuntu/install-kde-kubuntu-on-ubuntu/ . You will probably see that your xorg.conf file was backed up to xorg.conf.1 during the ?KDE / Kubuntu installation. Just copy the xorg.conf.1 back to xorg.conf, reboot, and everything should be fine. I also tried to do that by booting into recovery mode and then droping onto the shell. But it would not let me rename, came up with some error.

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• The practical cost of swapping effects

  - by sebf

  Hello, I use XNA for my projects and on those forums I sometimes see references to the fact that swapping an effect for a mesh has a relatively high cost, which surprises me as I thought to swap an effect was simply a case of copying the replacement shader program to the GPU along with appropriate parameters. I wondered if someone could explain exactly what is costly about this process? And put, if possible, 'relatively' into context? For example say I wanted to use a short shader to help with picking, I would: Change the effect on every object, calculting a unique color to identify it and providing it to the shader. Draw all the objects to a render target in memory. Get the color from the target and use it to look up the selected object. What portion of the total time taken to complete that process would be spent swapping the shaders? My instincts would say that rendering the scene again, no matter how simple the shader, would be an order of magnitude slower than any other part of the process so why all the concern over effects?

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• Any significant performance cost to using BlendState.Premultiplied?

  - by Donutz

  Normally I guess you'd use BlendState.AlphaBlend because normally when you load your textures through the pipeline they're already premultiplied. However, if you're loading textures at runtime from PNGs or some such, you have to loop through the pixels and premultiply them, which can take a long time if you've got a lot of textures to load. So it looks (haven't tried it) like using BlendState.Premultiplied instead of BlendState.AlphaBlend should handle non-premultiplied textures and produce the same visual result, without all the startup costs. I have to wonder if there's a non-obvious cost to doing this, like a huge drop in performance or something. Anyone know?

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• Low graphics mode on ubuntu 12.10 with intel 4000

  - by Amey Jah

  I recently upgraded to 12.10 (fresh install). Now I am facing wierd problem, randomly for when I boot I get a message of low graphics. For now, I switch to console using alt+f1 and then rebboot. On reboot, I select recovery mode, allow system to boot and then again reboot. Now I select normal mode and my graphics loads smoothly. Could you please tell me what could e the issue? I have Dell inspiron 5230 with Intel 4000 onboard graphics. --Amey

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• How to control / disable low level battery on bluetooth mouse

  - by Alberto

  I have a little problem with my Kesington Bluetooth Mouse on Ubuntu 12.10. Ubuntu 12.10 considers my bluetooth mouse battery as a system battery as if it was the main laptop battery (so I have two on the battery indicator, the main and the bluetooth one). When it runs low level, near to die, battery, my laptop acts as if it was the main battery and I must quickly stop bluetooth and continue on the touchpad if I want to work. Can anyone help me? Maybe I prefer to disable the battery control over the mouse, I don't care about it, I know it is fully charged, but Ubuntu always starts on 33% or less, I just want to work with it and when it will be battery-off I will recharge the batteries. Many thanks in advance. Alberto.

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• Cost of maintenance depending on paradigms

  - by Anto

  Is there any data on which paradigms allow for code which is easier/cheaper to maintain? Certainly, independantly of the chosen paradigm, good design is cheaper to maintain than bad, but there should probably be major differences coming only from the paradigm choice. Unstructured programming, for instance, generates very messy code (spaghetti code) which is expensive to maintain. In object oriented programming, implementation details are hidden and thus it should be pretty cheap to change those. In functional programming, there are no side effects, thus there is lesser risk of introducing bugs during maintainance, which should be cheaper. Is there any data on which paradigms are the most cost-efficient when coming down to maintenance? If no such data exists, what is your take on the question?

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• "The system is running in low graphics mode", unable to connect to the Internet

  - by Blah

  When I try to log onto Ubuntu, I get a notice that reads: The system is running in low graphics mode. I searched for a solution and there are a slew of answers. However, many of them seem to suggest reinstalling different things. After pressing Ctrl+Alt+F1 and getting to a terminal, I attempt commands like sudo apt-get install example. Upon doing so I get notices that say things such as could not resolve host which I am assuming means I'm not connected to the Internet. Since I can not connect to the Internet, none of these responses are helpful to me. What can I do?

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• Ubuntu 13.04/13.10 - low graphics mode/black screen after login

  - by Richard Stokes

  Since last week, my Ubuntu 13.04 installation started booting up in low graphics mode out of nowhere. I tried a number of solutions found on this site but to no avail. The other night, I decided to upgrade to 13.10 to see if the issue would be fixed in the process. Since then, the system starts fine, but when I login to my account, I'm just presented with a black screen. I switched to the terminal and did any necessary updates, but to no avail. I don't even know where to start debugging this issue, so I'd appreciate if someone could point me towards the first place to start looking?

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• Broadcom 4313 Signal strength very low on an HP Pavilion dv4

  - by thegreyspot

  I have a HP pavilion dv4 4141US laptop running fresh ubuntu 11.10. This laptop has a broadcom 4313gn chipset for the network card. The network card is using the brcmsmac driver. Which, I heard else where on askUbuntu that its the best driver to be using for this card. I can connect to my network, however I have extremely low network signal. Right now I am right in front of the router, and I only get 72%. If i go to the room directly behind the router's wall, i get no signal, where as with windows 7 I get a nice 70% percent. UPDATE: I use WEP at home and an open wireless connection at work. Both have same result. Both are completely different routers. Also you G What can i do?

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• Unstable Wifi and Spontaneous Low-graphic Error with Pavilion DV4

  - by Constant Dean

  I've been having numerous problems with connectivity through WiFi. It had been working for a few days and now it doesn't. On top of that around 40% of every time I turn on the laptop it shows "System running in low-graphics" error and I'm unable to view the desktop (sometimes not even able to access terminal), therefore having to manually power-down until it finally works. I use Ubuntu 12.10. nm-tool NetworkManager Tool State: connected (global) - Device: eth0 [Wired connection 1] ------------------------------------------- Type: Wired Driver: r8169 State: connected Default: yes HW Address: 84:34:97:6B:2E:D7 Capabilities: Carrier Detect: yes Speed: 10 Mb/s Wired Properties Carrier: on IPv4 Settings: Address: 192.168.1.10 Prefix: 24 (255.255.255.0) Gateway: 192.168.1.1 DNS: 192.168.1.1 DNS: 68.237.161.12 - Device: wlan0 ---------------------------------------------------------------- Type: 802.11 WiFi Driver: rt2800pci State: unavailable Default: no HW Address: 68:94:23:50:A5:D9 Capabilities: Wireless Properties WEP Encryption: yes WPA Encryption: yes WPA2 Encryption: yes Wireless Access Points

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• Low CPU/Memory/Memory-bandwith Pathfinding (maybe like in Warcraft 1)

  - by Valmond

  Dijkstra and A* are all nice and popular but what kind of algorithm was used in Warcraft 1 for pathfinding? I remember that the enemy could get trapped in bowl-like caverns which means there were (most probably) no full-path calculations from "start to end". If I recall correctly, the algorithm could be something like this: A) Move towards enemy until success or hitting a wall B) If blocked by a wall, follow the wall until you can move towards the enemy without being blocked and then do A) But I'd like to know, if someone knows :-) [edit] As explained to Byte56, I'm searching for a low cpu/mem/mem-bandwidth algo and wanted to know if Warcraft had some special secrets to deliver (never seen that kind of pathfinding elsewhere), I hope that that is more concordant with the stackexchange rules.

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• Cloud computing cost savings for large enterprise

  - by user13817

  I'm trying to understand whether cloud computing is meant for small to medium sized companies OR also for large companies. Imagine a website with a very large user base. The storage and bandwidth demands as well as the number of database transactions are incredibly high. The website might be hosting videos, music, images, etc. that keep the demands high. Does it make sense to be in the cloud when you know you need huge volumes of storage, bandwidth, and GET,PUT,etc. requests? (Each of these variables costs money in the cloud) OR does it make sense to build your own infrastructure? I can see the cost savings of cloud computing if you are a small business, but if you were aiming at the next big thing on the Internet, I can't quite see the benefits.

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