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• Reducing CPU load to absolute minimum [on hold]

  - by user191338

  I have had a couple of things gone missing I believe stolen in my shared apartment and want to run my laptop constantly with a webcam attached, running webcam surveillance software to record/ take pictures when motion is sensed. Id like to take whatever steps are necessary to be able to run the laptop constantly without the fan coming on, as its quite loud and even though it will be hidden it can be heard. Thus Id like to know what steps I can take to reduce CPU to the bare minimum for the laptop to boot up and run the camera software and send images via ftp / email when necessary. I have windows 7 installed, though I can reinstall it clean. Which are the windows services can I turn off, and more extreme disabling or measures of whatever kind which I can take. The OS would need to run the camera, wifi / networking. Thanks very much for any help.

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• How can I disable the beep when I plug in/unplug my laptop's AC adapter?

  - by Dunaril

  My Packard-Bell laptop is emitting a loud, annoying beep when I connect or disconnect it to/from an AC power source. Whether I have headphones plugged in or not does not change anything; the sound goes out of the speakers and wakes everyone up. Do you know of any ways to eliminate this sound? I searched around the Internet and found a solution involving setting a specific volume bar to 0 in the playback settings, but I did not find it on my laptop. I am using Windows 7.

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• How do I make the Windows low memory warning less sensitive?

  - by Stephen

  I keep getting this annoying low memory warning/prompt to close games I play. It happens very often and I still have ~6 gigs of ram free. I disabled virtual memory because it was putting stuff on the pagefile when I had 10 gigs free ram so that spiked my disk usage. Is there any way to disable this warning? I have 16GB ram so it shouldn't be an issue. I would prefer to keep pagefiles off because my HD is very loud so it's nice to keep it spun down as much as possible. I don't want to disable it completely. Ideally, I would like it to go off when I have ~2GB left rather than 6, but if this isn't viable, I may just disable it completely.

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• Computer has power but won't boot

  - by John Isaacks

  When I power on my computer it will not boot. It will not even go into bios or anything. It is as if it is not powering on at all, however the decorative casing lights turn on and the PC is making noise (like from the fans). I am reluctant to think it is the power supply since some part are getting power. I do not know what it is though? For the couple days leading up to this, the computer would make a loud noise and the screen would stop displaying anything. I had to reboot to get it to work again. Now nothing happens when I boot, except the case lights come on and it sounds like some fans are coming on. Any ideas?

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• Why is the pavucontrol level indicator jumping while nothing plays?

  - by EnterTheLiquidToasterFamily

  The level indicator in the screenshot does jump around even if nothing is playing. The indicator also reasonably represents sound levels when music is playing. I dont have any mediaservers running or noisy browsertabs open. Also no mic connected. When I turn the volume to max in software and on the amp, there is no noise from the speakers at all. Played music is loud and not distorted. Hardware: Realtek ALC889 over optical audio connector to a generic amp. Software: Debian Wheezy with latest backport kernel 3.14 (same thing on wheezy 3.2 stock), wheezy pulseaudio, xfce session, a custom asound.conf that enables pulseaudio to push sound over optical port. /etc/asound.conf pcm.a52 { @args [CARD] @args.CARD { type string } type rate slave { pcm { type a52 bitrate 448 channels 6 card $CARD } rate 48000 #required somehow, otherwise nothing happens in PulseAudio } }

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• Reducing volume of an audio device on windows 7

  - by bdonlan

  I have a USB headset with a very loud amplifier, but low granularity in its gain control. In order to get comfortable audio, I have to reduce the individual application levels in the mixer to '1', and the master mixer to around '10'. Of course, new applications start out at '10', and immediately blast out my ears. Is there a way to add a filter to cut down the volume some so I can get better control of it? That is, reduce the volume of '100' so I can work within a reasonable range.

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• NVidia raid 5 array spooling sounds and delay

  - by Chase B. Gale

  I've had a raid 5 array setup with 3 2TB WD Green drives for about 3 years now. Starting last week, when I would access the array for the first time, I hear a loud drive spooling sound and experience a ~5 second delay before being able to access\save files. This behavior happens when I don't use the array for some time (about an hour) and after occurring it doesn't happen again if I continue to access the array. I've run SMART scans on all drives and they come back as being a-ok. What's causing this? Is my array getting close to death?

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• Increase Volume of an MKV Video from Linux Terminal

  - by The How-To Geek

  I've got a large amount of .MKV video files which seem to all play at a very low volume - I end up having to turn the TV up all the way to hear them, which is really irritating when I switch to another channel and wake the dead because it's so loud. What I'm looking for is a command-line method to increase the volume (so I can run it on all of them quickly) that would hopefully work regardless of the audio codec in use in the particular file. (I don't mind hard-coding the output audio though). For reference, I'm using Ubuntu 9.04 on my server, and the files are being played back with Boxee on a Mac Mini, but the volume problem is the same on Windows too.

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• Increase Volume of an MKV Video from Linux Terminal

  - by The How-To Geek

  I've got a large amount of .MKV video files which seem to all play at a very low volume - I end up having to turn the TV up all the way to hear them, which is really irritating when I switch to another channel and wake the dead because it's so loud. What I'm looking for is a command-line method to increase the volume (so I can run it on all of them quickly) that would hopefully work regardless of the audio codec in use in the particular file. (I don't mind hard-coding the output audio though). For reference, I'm using Ubuntu 9.04 on my server, and the files are being played back with Boxee on a Mac Mini, but the volume problem is the same on Windows too.

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• Is it possible to power off a PCIe video card/slot? (eg. hot-plug)

  - by CR.

  I'm looking at building a system that supports VT-d so I can pass through a high powered loud video card to a Xen/KVM/whatever VM (host will be Linux based). However, when I'm not using the VM I want to turn the video card off so its fan does not run. The card will not be used when the VM isn't running. Anyone know if this is possible? The PCI-Express hot-plug specification allows cutting power to specific slots but I have never heard of anyone doing it with a video card and my searches for information have turned up nothing.

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• Awareness Makes Sure You’re Not Tuned Out While Listening to Music

  - by Jason Fitzpatrick

  iOS: You want to listen to your music but you don’t want to be totally unaware of your surroundings. What do you do? Install Awareness, a simple app that will alert you if your device mic picks up loud noises. Whether you want to fall asleep listening to some relaxing music while still hearing bumbs in the night or you want to listen to music when you’re out and about without being completely started by events your earbuds are filtering out. To use the app just run it in tandem with your music, adjust the sensitivity to account for the ambient sound, and you’re in business. If any sounds exceed that level, they’ll be piped in through your headphones to alert you. Awareness is currently free in the App Store (down from a high of $6.99) so if you’d like to play around with it, now’s the time to grab a copy. Awareness [via Addictive Tips] How To Be Your Own Personal Clone Army (With a Little Photoshop) How To Properly Scan a Photograph (And Get An Even Better Image) The HTG Guide to Hiding Your Data in a TrueCrypt Hidden Volume

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• Microphone - static background noise suppression

  - by user1873947

  My soundcard is Realtek ALC 892. On Windows 7 I use official Realtek drivers, on Linux I use PulseAudio (on Ubuntu 13.10). On both Windows and Linux, when I enable microphone boost +30db (required because my microphone is quiet), I get very annoying and loud background noise (I also confirmed the background noise with Audacity on both systems). However, Windows Realtek drivers have noise suppression option which works (after enabling it, Audacity shows no background noise and my ears also confirm that there is no background noise). My question is how can I enable background noise suppression in ALSA/PulseAudio? Is there any module I can install or maybe there is a setting for it that can be enabled in config file? I can't find solution for it and this is the only thing that prevents me from switching to Linux completely - as I talk using microphone a lot and on Windows the Realtek software removes the background noise completely and PulseAudio doesn't remove it, which means the recorded voice on Linux is very bad. I know I could buy better soundcard and microphone, but as I said, Windows Realtek drivers remove the noise on software level in real time (ie no noise when talking on TeamSpeak3/Steam/whatever voip programme) so I hope that there is such option on Linux as well. Thanks in advance! This is also crossposted on Unix StackExchange

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• Sorry. Not Much Happened Today!

  - by steve.diamond

  And THAT blog headline is dedicated to Seth Godin, who recently wrote that unlike its print brethren, digital media outlets aren't burdened with having to make their articles long enough to match the number of surrounding ad pages. He states that just because you CAN write more doesn't mean you SHOULD. Well, you don't have to tell me that twice. So to continue my rambling entry today, I'd suggest you read this post by Donal Daly on 10 steps to intelligent Social CRM for Sales. No seriously, read it. It's almost like a Groundswell Cliff Notes for sales people. I particularly love his third point. Of course I haven't "gotten" it yet, but I've got a whole life time, for crying out loud. Seriously, this is a great read and a fast one. And finally, in the department of longer reads, a thanks and shout out to Paul Greenberg for mentioning Oracle's new iPad app for Siebel CRM in his ZDNet blog. Hey, I warned you...not much happened today. Per se!

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• Repurpose Old Phones As Intercoms

  - by Jason Fitzpatrick

  If you’ve got some old wired telephones laying around for want of a project, this simple hack turns two wired phones into an intercom. Over at Hack A Day, Caleb Kraft shares his simple phone hack inspired by his VW bus. He writes: In case you haven’t noticed from my many comments on the subject, I drive a VW bus. It is a 1976 Westfalia camper with sage green paint and green plaid upholstery. I absolutely love it and so does the rest of my family. We go for drives in the country as well as camping regularly. We have found that the kids have a hard time communicating with us while we’re going higher speeds. These things aren’t the quietest automobiles in the world. Pushing this bread loaf shaped hunk of steel down the road with an engine that might top out at 75hp results in wind noise, engine noise, and of course, vibration. I decided to employ a really old hack to put two functional telephones in the bus so my kids can talk to my wife (or whoever the passenger is) without screaming quite so loud. This hack is extremely easy, fairly cheap, and can be done in just a few minutes. The result is a functional intercom that you could use pretty much anywhere! For more pics of his setup (and a neat video of his rather retro ride), check out the link below. Hack Your Kindle for Easy Font Customization HTG Explains: What Is RSS and How Can I Benefit From Using It? HTG Explains: Why You Only Have to Wipe a Disk Once to Erase It

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• E3 Booth Babes Display a Painful Lack of Video Game Knowledge [Video]

  - by Jason Fitzpatrick

  If you thought a prerequisite for manning a booth at an electronics expo was a passing knowledge of the electronics and games you were promoting, you were wrong. In the above video Chloe Dykstra puts a set of “booth babes” from the E3 2011 conference to the test by asking them simple questions about video games both new and old. If you’re a gaming fan and you can watch this video without laughing out loud you’ve got an iron will (or you’re shaking your head in disbelief that someone could work a gaming convention and not know the answers to these questions). We won’t lie, we were shaking our head when the one model admitted that she’d worked at GameStop for a year and still didn’t know any of the answers. What questions would you put on list? How about “Finish this sentence: ‘Your Princess is in another…’”, “Dimension?”. 5HP: Booth Babe Edition – E3 2011 [YouTube via Kotaku] How To Encrypt Your Cloud-Based Drive with BoxcryptorHTG Explains: Photography with Film-Based CamerasHow to Clean Your Dirty Smartphone (Without Breaking Something)

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• Inspiration

  - by Oracle Campus Blog

  Once again, I find myself back in Seoul – ASEM Tower, 16th Floor in a mobile room. I’m busy preparing for the interview process that is about to take place for Oracle Korea’s GIP 7th (Graduate Intake Program): scheduling the first round interviews, organizing interview guidelines, educating interviewers on the process and framework and  getting all the logistics ready for the 1st round interview. Seoul or Korea rather is a fascinating place. Highly efficient, the utmost respect for seniors and results orientated. When students come in for an interview at first it was hard to tell them apart – there seems to be accepted interview attire that must be worn when attending an interview. Males and Females, all dress in black suits, with white shirts underneath – with males to wear simple and dark colored ties. During the interview, they would all sit very upright, all would bow when entering the room, place their hands on the laps and very often they would hold minimal eye contact. They would project their voice loud to portray confidence, they would talk in the Korean formal dialect at all times and will treat every question, every moment with extreme clarity and the utmost professionalism. When the interview concludes, they will all stand hands by their sides, bow 90 degrees and thank all the interviewers for their precious time and opportunity. As soon as they leave the interview room, I could hear all their sighs of relief and commended each other on their efforts. More and more I learn about the Korean culture it inspires me. Their patriotism, their respect for each, their values, their appreciation, their motivation, their desires and passion – it truly was an experience for me (even as a recruiter) and can’t help but feel truly impressed and motivated to live for every moment. Philip Yi     Oracle Campus Recruiter 

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• cpufreq not available 11.10

  - by code shogan

  on 11.04 I had cpufreq working on my "AMD Turion(tm) 64 X2 Mobile Technology TL-50 stepping 02" processors, however now on oneiric cpufreq won't load. The core temperature of my cpu is normally 40 c, but lately it's cooking away at 75-80+ c and the fan is always extremely loud even when cpu usage has at 0.4%. and after this dmesg | grep -i cpu I got: Brought up 2 CPUs Switch to broadcast mode on CPU1 Switch to broadcast mode on CPU0 Switched to NOHz mode on CPU #1 Switched to NOHz mode on CPU #0 ACPI: acpi_idle registered with cpuidle cpufreq-nforce2: No nForce2 chipset. cpuidle: using governor ladder cpuidle: using governor menu powernow-k8: Found 1 AMD Turion(tm) 64 X2 Mobile Technology TL-50 (2 cpu cores) (version 2.20.00) I see something about governors and ladder there, does this mean the OS is able to scale my cpu's or not? If so is there a way I can determine it's working? I saw that for other users that the wrong module had been loaded and by disabling it they were able to get cpufreq loaded. How can I tell what scaling module is loaded? stats: Ubuntu Oneiric 32bit Dell Inspiron 1501

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• Sending changes to a terrain heightmap over UDP

  - by Floomi

  This is a more conceptual, thinking-out-loud question than a technical one. I have a 3D heightmapped terrain as part of a multiplayer RTS that I would like to terraform over a network. The terraforming will be done by units within the gameworld; the player will paint a "target heightmap" that they'd like the current terrain to resemble and units will deform towards that on their own (a la Perimeter). Given my terrain is 257x257 vertices, the naive approach of sending heights when they change will flood the bandwidth very quickly - updating a quarter of the terrain every second will hit ~66kB/s. This is clearly way too much. My next thought was to move to a brush-based system, where you send e.g. the centre of a circle, its radius, and some function defining the influence of the brush from the centre going outwards. But even with reliable UDP the "start" and "stop" messages could still be delayed. I guess I could compare timestamps and compensate for this, although it'd likely mean that clients would deform verts too much on their local simulations and then have to smooth them back to the correct heights. I could also send absolute vert heights in the "start" and "stop" messages to guarantee correct data on the clients. Alternatively I could treat brushes in a similar way to units, and do the standard position + velocity + client-side prediction jazz on them, with the added stipulation that they deform terrain within a certain radius around them. The server could then intermittently do a pass and send (a subset of) recently updated verts to clients as and when there's bandwidth to spare. Any other suggestions, or indications that I'm on the right (or wrong!) track with any of these ideas would be greatly appreciated.

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• Make the sound louder in Lubuntu

  - by Andrew

  I have a Toshiba r835 running Lubuntu 11.10. Turning the volume slider up all the way doesn't give very loud sound. I've tried typing alsamixer in a terminal and turning up all the levels there to maximum, but the speakers are still fairly quiet. Is there a simple way to increase maximum volume in software? I understand that there are physical limits to the sound the laptop's speakers can produce, but I suspect my maximum volume is limited by software. EDIT: This is exactly the type of solution I'm looking for. However, it doesn't work for me. What I did: sudo pico /etc/asound.conf This file does not exist, so I create a new one, containing: pcm.!default { type plug slave.pcm "softvol" } pcm.softvol { type softvol slave { pcm "dmix" } control { name "Pre-Amp" card 0 } min_dB -5.0 max_dB 20.0 resolution 6 } I reboot the machine, and type alsamixer. I use my left/right arrow keys to inspect the various volume options. I expect to see a new option, called Pre-Amp, but I don't see one. This fix seems to work for other people. Why doesn't this fix work for me?

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• Dell Mini 9 Integrated Microphone -- not working

  - by Josh Eismanaf

  Im running the latest Debian version, 6.0 on my Dell Mini 9.Webcam and sound work, but microphone is a no-go. I hope even though it is Debian, fellow Linux users can help. In Alsamixer (1.0.23), I have Capture, Digital, and Mic settings all the way up. There are no options for adjusting "Front" mic settings. (May have been for older alsamixer versions?) In Sound Recorder, playback has loud noise/feedback? Under Preferences in Volume Control under the Recording tab, both Capture and Digital are permanently checked, regardless if I uncheck them. I'm not sure how to interpret the above, but I am just trying to offer as much relevant background information as I can. I've been scouring forums for the answer, but to no avail. Most questions/answers are from 2008, and couldn't find a solution. I'm not very handy with the Linux machine, but love to learn / am learning. Also, I've attempted the solution here, and it didn't work. Thanks, in advance, for your help!

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• AllSparkCube Packs 4,096 LEDs into a Giant Computer Controlled Display

  - by Jason Fitzpatrick

  LED matrix cubes are nothing new, but this 16x16x16 monster towers over the tiny 4x4x4 desktop variety. Check out the video to see it in action. Sound warning: the music starts off very loud and bass-filled; we’d recommend turning down the speakers if you’re watching from your cube. So what compels someone to build a giant LED cube driven by over a dozen Arduino shields? If you’re the employees at Adaptive Computing, you do it to dazzles crowds and show off your organizational skills: Every time I talk about the All Spark Cube people ask “so what does it do?” The features of the All Spark are the reason it was built and sponsored by Adaptive Computing. The Cube was built to catch peoples’ attention and to demonstrate how Adaptive can take a chaotic mess and inject order, structure and efficiency. We wrote several examples of how the All Spark Cube can demonstrate the effectiveness of a complex data center. If you’re interested in building a monster of your own, hit up the link below for more information, schematics, and videos. How Hackers Can Disguise Malicious Programs With Fake File Extensions Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer

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• Visually and audibly unambiguous subset of the Latin alphabet?

  - by elliot42

  Imagine you give someone a card with the code "5SBDO0" on it. In some fonts, the letter "S" is difficult to visually distinguish from the number five, (as with number zero and letter "O"). Reading the code out loud, it might be difficult to distinguish "B" from "D", necessitating saying "B as in boy," "D as in dog," or using a "phonetic alphabet" instead. What's the biggest subset of letters and numbers that will, in most cases, both look unambiguous visually and sound unambiguous when read aloud? Background: We want to generate a short string that can encode as many values as possible while still being easy to communicate. Imagine you have a 6-character string, "123456". In base 10 this can encode 10^6 values. In hex "1B23DF" you can encode 16^6 values in the same number of characters, but this can sound ambiguous when read aloud. ("B" vs. "D") Likewise for any string of N characters, you get (size of alphabet)^N values. The string is limited to a length of about six characters, due to wanting to fit easily within the capacity of human working memory capacity. Thus to find the max number of values we can encode, we need to find that largest unambiguous set of letters/numbers. There's no reason we can't consider the letters G-Z, and some common punctuation, but I don't want to have to go manually pairwise compare "does G sound like A?", "does G sound like B?", "does G sound like C" myself. As we know this would be O(n^2) linguistic work to do =)...

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• How to avoid jumping to a solution when under pressure? [closed]

  - by GlenPeterson

  When under a particularly strict programming deadline (like an hour), if I panic at all, my tendency is to jump into coding without a real plan and hope I figure it out as I go along. Given enough time, this can work, but in an interview it's been pretty unsuccessful, if not downright counter-productive. I'm not always comfortable sitting there thinking while the clock ticks away. Is there a checklist or are there techniques to recognize when you understand the problem well enough to start coding? Maybe don't touch the keyboard for the first 5-10 minutes of the problem? At what point do you give up and code a brute-force solution with the hope of reasoning out a better solution later? When is it most productive to think and design more vs. code some experiments to and figure out the design later? Here is a list of techniques for taking a math test and another for taking an oral exam. Is there is a similar list of techniques for handling a programming problem under pressure? ANSWERS: I think this is a valid answer: How To Solve It. I found the link as an answer to Steps to solve or approach towards a solution. There were also some really good tips at Is thinking out loud during an interview really the best strategy?. A great and concise argument for TDD is the first answer to TDD Writing code vs Figuring out the answer to a problem?. My question may be a near-duplicate of that one.

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• Skip CodedUI Tests, use Selenium for Web Automation

  - by Aligned

  Originally posted on: http://geekswithblogs.net/Aligned/archive/2013/10/31/skip-codedui-tests-use-selenium-for-web-automation.aspxI recently joined a team that was using Agile Methodologies to create a new product. They have a working beta product after 10 or so 2 week sprints and already had UI’s that had changed several times as they went through iterations of their UI. As a result, the QA team was falling behind with automated tests and I was tasked to help them catch up and expand their tests. The project is a website. I heard many complaints about how hard it is to work with CodedUI (writing our own code, not relying on the recorder as we wanted re-usable and more maintainable code) then it took me 4+ hours to fix one issue. It was hard to traverse the key and debugging the objects with breakpoints… I said out loud “there has to be a better way or a framework the uses jQuery to run through the tests.” Plus it seemed really slow (wait… finding the object … wait… start putting in text…). Plus some tests would randomly fail on the test agents (using the test settings and an automated build, they are run on VMs using Microsoft test agents). Enough complaining. Selenium to the rescue (mostly). The lead QA guy decided to try it out and we haven’t turned back. We are now running tests in Chrome and Firefox and they run a lot faster. We had IE running to, but some of the tests were running fine locally, but hanging on the test agents. I’ll add some hints and lessons learned in a later post.

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• Why does my mic boost automatically go to 100 on every boot?

  - by Ben

  When my computer turns on, it automatically sets the "mic boost" sound setting to 100. This causes a loud static sound in my speakers. I can manually go to alsamixer and turn the mic boost down manually, but I would prefer it if I didn't have to do this every time I turn the computer on. I've tried running sudo alsactl store after fixing the settings, and this does save them, but I have to run sudo alsactl restore to restore the settings. This means that I have to manually fix the sound every time I start the computer anyway, so it isn't really a fix. I tried putting sudo alsactl restore in my startup programs, but that didn't seem to fix anything. I'm running Ubuntu 12.04, but I started having this problem before upgrading from 11.10. I'm using a Sony Vaio laptop. I'm not really sure what made it start; it seemed like I just started having the problem randomly one day. Any help would be appreciated! Edit: here is the output from running amixer: http://paste.ubuntu.com/1060080/

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