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• gnome-power-manager is running while trying to log in. How to get rid of it?

  - by koushik

  After booting into the ubuntu login screen and clicking on my user name and entering the password, I get a dialog stating that gnome-power-manager is still running. The dialog presents 2 buttons, 1 to Cancel and other to Logout Anyway. This issue happens about 50% of the time and I don't remember doing anything related to power management recently. Also, even if I don't choose any option in the dialog it goes away after about 30s. This is happening on a desktop machine as well as a laptop. On the laptop I have configured power management for myself (not for gdm) whereas in desktop I have not configured power management for any user. This is only an annoyance but still I would like to fix it, especially on my desktop where I am interested in getting it auto-login ASAP into my userid. Any ideas why this could be happenning?

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• Windows 7 power management in Boot Camp mode

  - by qntmfred

  I have a Macbook Pro with Windows 7 installed in Boot Camp. I have serious problems with the power management and not sure why. I have the default Balanced power plan selected. Many times when I close the laptop and leave it for more than just a few minutes, when I open it back up, it does not awake immediately. I end up having to press the power button to get it to wake up. Sometimes this causes it to wake up in Windows mode, sometimes it reboots completely, sometimes the battery has been drained and Windows has to restart. Is this a common problem? Can I fix it?

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• What is the best position for power unit?

  - by guest86

  I would like to buy new computer case. Last time I bought a computer was in 2008 and many things have changed up to day. Many new computer cases have power unit placed down, on bottom. I'm thinking about buying some of those cases, but i'm not sure about something - if power unit is placed on the bottom it can't take away hot air from the case and pump it out right? All my PC parts are silent - CPU (E8200, placed below 12cm Nochtua fan of power unit) has heat-pipe cooler with Nochtua fan spinning at only 800rpms, GPU has cooler powered by 7V instead 12 and that's why i don't want to HAVE TO place another fan to pump out hot air instead of PU placed on top. That might make some noise. So i ask someone more experienced: if i buy some computer case with PU placed down, do i HAVE TO place some fan to pump out hot air?

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• Windows 7 USB power lose after a few seconds / minutes

  - by Stefan Dunn

  My friend's computer has a problem where the USB ports causes problems with the power of some devices connected to the computer. The USB mouse has no problems, however the Wireless Adapter looses power after around 20 seconds of use and USB Flash Drives cause the computer to either freeze, lose power (and become unresponsive) or become disconnected (still shown in Device Manager, but not in My Computer) when trying to transfer any type of file to / from the computer. I have a suspicion it's the Motherboard but could it also be a Software problem? Tried a new case, RAM, CPU and GFX Card which had no effect. The problem occurs on both the Front USB and Back (Motherboard) USB Ports. UPDATE: Tried the USB devices with an Ubuntu Live CD and they work fine, could this mean it's a problem with Windows (x64)?

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• How to disable power to USB ports when laptop is in sleep mode

  - by Greg

  I have a Windows7 laptop with two external 2.5" HDDs and a cooling pad connected through USB ports. When I put the laptop to sleep, these devices are still powered on - the fan in the cooling pad is still spinning, the drives are still spinning. I want to set it all up so that they power down when in sleep. I tried setting the Allow the computer to turn off this device to save power option in the USB Root Hubs' Properties in Device Manager and enabling USB selective suspend in power options - it didn't work. As it's a laptop, BIOS options are extremely locked down, so I can't even see anything relevant to sleep in there. Is it even possible to do this?

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• Computer randomly shuts down with a fading alarm power button and CD drive

  - by Shad

  I am currently experiencing something very very odd. Having build my PC myself, I have never had any issues (or anything heat related). A few moments ago my computer shut down very randomly and everything goes blank, when I looked down on my case's power button it was fading on and off in such way I've had never seen before. I noticed the CD drive all of a sudden also started blinking randomly. What do you guys think this problem is related to? It is definitely not a overheating issue and I am pretty sure my 600 watt power supply didn't blow because right now I am able to turn it on and boot up the PC but 20 seconds later it shuts down (sometimes doesn't shut down for 2 minutes). I have no idea what this is... My specs are (built by myself): i5 3570k (unoverclocked) GTX 560ti Asrock Z77 Pro4-M motherboard 8GB Vengeance RAM 600W Corsair power supply 500GB of Seagate HD Case: Corsair Carbide 300R

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• Is the 4-pin PSU connector required? (Trying to connect a PSU to a mini case.)

  - by Geeks On Hugs

  I am trying to build a computer, placing an ASUS P8H67-I DELUXE in a custom retro C64 case. The case is an extra small form factor which can accomodate the Mini ITX board, but requires an external power supply, similar to the power-bricks that laptops use. I am looking at different power supplies and like these, but cannot figure out whether/how to power this system because they provide a 24-pin connector, but the motherboard has a 4-pin connector as well. Is the 4-pin connector optional or is it required? If it is required, how can I provide power for this system?

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• Dell Latitude E6400 power button and wireless not working or only working intermittently

  - by Droid

  The power button on the laptop stopped working randomly as of a day or two ago. I can only power the laptop on if its attached to a docking station, on which I can use the power button to turn on/off the laptop. Today the wireless card stopped working (the wifi light does not turn on, even after I turn on the wireless switch). What is the problem and how can I fix it? The laptop is about 1 year old. I have not dropped it, but do carry it around a good amount, including docking it/undocking it frequently.

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• PC doesn't power up anymore

  - by Andrew

  I will tell you the story behind the problem. The computer needed to be reinstalled, it has 2 HDDs so I had to un-plug one to see which is which, to save as much data as possible. After unplugging the first one, it booted with the reinstallation CD, it wasn't the HDD I was looking for so I turned it off and unplugged the other one. After unplugging and turning on, right after booting test, the HDD was turned off, only the CPU fan was working. Turned it off with the power supply's button help, holding the power button didn't do it. And now it doesn't want to turn on anymore. I tried with another test power supply but the result is the same, doesn't want to turn on. Any idea?

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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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• Where do you put your unit test?

  - by soulmerge

  I have found several conventions to housekeeping unit tests in a project and I'm not sure which approach would be suitable for our next PHP project. I am trying to find the best convention to encourage easy development and accessibility of the tests when reviewing the source code. I would be very interested in your experience/opinion regarding each: One folder for productive code, another for unit tests: This separates unit tests from the logic files of the project. This separation of concerns is as much a nuisance as it is an advantage: Someone looking into the source code of the project will - so I suppose - either browse the implementation or the unit tests (or more commonly: the implementation only). The advantage of unit tests being another viewpoint to your classes is lost - those two viewpoints are just too far apart IMO. Annotated test methods: Any modern unit testing framework I know allows developers to create dedicated test methods, annotating them (@test) and embedding them in the project code. The big drawback I see here is that the project files get cluttered. Even if these methods are separated using a comment header (like UNIT TESTS below this line) it just bloats the class unnecessarily. Test files within the same folders as the implementation files: Our file naming convention dictates that PHP files containing classes (one class per file) should end with .class.php. I could imagine that putting unit tests regarding a class file into another one ending on .test.php would render the tests much more present to other developers without tainting the class. Although it bloats the project folders, instead of the implementation files, this is my favorite so far, but I have my doubts: I would think others have come up with this already, and discarded this option for some reason (i.e. I have not seen a java project with the files Foo.java and FooTest.java within the same folder.) Maybe it's because java developers make heavier use of IDEs that allow them easier access to the tests, whereas in PHP no big editors have emerged (like eclipse for java) - many devs I know use vim/emacs or similar editors with little support for PHP development per se. What is your experience with any of these unit test placements? Do you have another convention I haven't listed here? Or am I just overrating unit test accessibility to reviewers?

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• organizing unit test

  - by soulmerge

  I have found several conventions to housekeeping unit tests in a project and I'm not sure which approach would be suitable for our next PHP project. I am trying to find the best convention to encourage easy development and accessibility of the tests when reviewing the source code. I would be very interested in your experience/opinion regarding each: One folder for productive code, another for unit tests: This separates unit tests from the logic files of the project. This separation of concerns is as much a nuisance as it is an advantage: Someone looking into the source code of the project will - so I suppose - either browse the implementation or the unit tests (or more commonly: the implementation only). The advantage of unit tests being another viewpoint to your classes is lost - those two viewpoints are just too far apart IMO. Annotated test methods: Any modern unit testing framework I know allows developers to create dedicated test methods, annotating them (@test) and embedding them in the project code. The big drawback I see here is that the project files get cluttered. Even if these methods are separated using a comment header (like UNIT TESTS below this line) it just bloats the class unnecessarily. Test files within the same folders as the implementation files: Our file naming convention dictates that PHP files containing classes (one class per file) should end with .class.php. I could imagine that putting unit tests regarding a class file into another one ending on .test.php would render the tests much more present to other developers without tainting the class. Although it bloats the project folders, instead of the implementation files, this is my favorite so far, but I have my doubts: I would think others have come up with this already, and discarded this option for some reason (i.e. I have not seen a java project with the files Foo.java and FooTest.java within the same folder.) Maybe it's because java developers make heavier use of IDEs that allow them easier access to the tests, whereas in PHP no big editors have emerged (like eclipse for java) - many devs I know use vim/emacs or similar editors with little support for PHP development per se. What is your experience with any of these unit test placements? Do you have another convention I haven't listed here? Or am I just overrating unit test accessibility to reviewing developers?

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• TDD vs. Unit testing

  - by Walter

  My company is fairly new to unit testing our code. I've been reading about TDD and unit testing for some time and am convinced of their value. I've attempted to convince our team that TDD is worth the effort of learning and changing our mindsets on how we program but it is a struggle. Which brings me to my question(s). There are many in the TDD community who are very religious about writing the test and then the code (and I'm with them), but for a team that is struggling with TDD does a compromise still bring added benefits? I can probably succeed in getting the team to write unit tests once the code is written (perhaps as a requirement for checking in code) and my assumption is that there is still value in writing those unit tests. What's the best way to bring a struggling team into TDD? And failing that is it still worth writing unit tests even if it is after the code is written? EDIT What I've taken away from this is that it is important for us to start unit testing, somewhere in the coding process. For those in the team who pickup the concept, start to move more towards TDD and testing first. Thanks for everyone's input. FOLLOW UP We recently started a new small project and a small portion of the team used TDD, the rest wrote unit tests after the code. After we wrapped up the coding portion of the project, those writing unit tests after the code were surprised to see the TDD coders already done and with more solid code. It was a good way to win over the skeptics. We still have a lot of growing pains ahead, but the battle of wills appears to be over. Thanks for everyone who offered advice!

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• Unit testing opaque structure based C API

  - by Nicolas Goy

  I have a library I wrote with API based on opaque structures. Using opaque structures has a lot of benefits and I am very happy with it. Now that my API are stable in term of specifications, I'd like to write a complete battery of unit test to ensure a solid base before releasing it. My concern is simple, how do you unit test API based on opaque structures where the main goal is to hide the internal logic? For example, let's take a very simple object, an array with a very simple test: WSArray a = WSArrayCreate(); int foo = 5; WSArrayAppendValue(a, &foo); int *bar = WSArrayGetValueAtIndex(a, 0); if(&foo != bar) printf("Eroneous value returned\n"); else printf("Good value returned\n"); WSRelease(a); Of course, this tests some facts, like the array actually acts as wanted with 1 value, but when I write unit tests, at least in C, I usualy compare the memory footprint of my datastructures with a known state. In my example, I don't know if some internal state of the array is broken. How would you handle that? I'd really like to avoid adding codes in the implementation files only for unit testings, I really emphasis loose coupling of modules, and injecting unit tests into the implementation would seem rather invasive to me. My first thought was to include the implementation file into my unit test, linking my unit test statically to my library. For example: #include <WS/WS.h> #include <WS/Collection/Array.c> static void TestArray(void) { WSArray a = WSArrayCreate(); /* Structure members are available because we included Array.c */ printf("%d\n", a->count); } Is that a good idea? Of course, the unit tests won't benefit from encapsulation, but they are here to ensure it's actually working.

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• what appropriate "Allocation Unit Size" for an exFAT SD card with ReadyBoost

  - by Revolter

  I've brought an 4GB SD card and I'm dedicating it for use by ReadyBoost (on Windows7) Im looking to get the most profit on performance, so i've formatted it with exFAT (as recommended by Microsoft) but I have some doubts to define what best .Allocation Unit Size* I should choose. Since I can't get how ReadyBoost/SD card exactly read/seek the data, can someone tell what make choosing an Allocation Unit Size in favor of another for this scheme ? Apparently, ReadyBoost is allocating all the free space in SD card as one huge file, so a big Allocation Unit Size is advised for fastest reading time. I'm not confusing with ordinary HDD's ?

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• Oracle Lean Supply Chain Newsletter

  - by [email protected]

  Ready to ride the cutting edge? Leader or Laggard? There's plenty of new material and exciting articles on Oracle Supply Chain products in the quarterly newsletter, the February '10 issue contained some interesting articles on: - Supply Chains in the new 'Abnornal" - Manufacturers go Paperless to Boost Lean - Five Good Reasons to go to Release 12.1 - Software and Hardware complete with the Sun acquisition See details at: http://www.oracle.com/newsletters/samples/supply-chain-management.html Stay tuned for the May'10 issue and some great articles worth reviewing

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• Information Driven Value Chains: Achieving Supply Chain Excellence in the 21st Century With Oracle -

  World-class supply chains can help companies achieve top line and bottom line results in today’s complex,global world.Tune into this conversation with Rick Jewell,SVP,Oracle Supply Chain Development,to hear about Oracle’s vision for world class SCM,and the latest and greatest on Oracle Supply Chain Management solutions.You will learn about Oracle’s complete,best-in-class,open and integrated solutions,which are helping companies drive profitability,achieve operational excellence,streamline innovation,and manage risk and compliance in today’s complex,global world.

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• Information Driven Value Chains: Achieving Supply Chain Excellence in the 21st Century With Oracle -

  World-class supply chains can help companies achieve top line and bottom line results in today’s complex,global world.Tune into this conversation with Rick Jewell,SVP,Oracle Supply Chain Development,to hear about Oracle’s vision for world class SCM,and the latest and greatest on Oracle Supply Chain Management solutions.You will learn about Oracle’s complete,best-in-class,open and integrated solutions,which are helping companies drive profitability,achieve operational excellence,streamline innovation,and manage risk and compliance in today’s complex,global world.

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• Power states in Windows

  - by Kurt

  Does anybody know or have a link to documentation on how the Power Manager of Windows, determines to go to the ACPI power states S1-S4? Are there any settings that can be configured? I know that by default states S1-S3 are disabled in Vista and later (they can be enabled by a group policy). Can Windows cycle through these states while for instance an application is actively running?

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• Intel atom and overall power consumption

  - by amorfis

  I am considering buying of Intel Atom machine. Power consumption is one of my concerns (it is for small server). I know CPU itself consumes a little power, but I heard that chipset consumes much more. Anybody knows how much can such machine consume? I am considering Intel MoBo BLKD945GCLF (chipset: Intel® 945GC Express Chipset with ICH7)

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• Power and Cooling Cost compared with Server/Hardware Cost

  - by psaccounts

  Has anyone done, or is aware of any, calculations to compare the cost of power and cooling compared to the cost of hardware (servers) in a typical data center? This is to compute a true total cost of ownership of self-hosting servers. Of course real TCO includes: hardware_cost + power + cooling + rental + human_cost + maintenance Is there any study that says something like (TCO - hardware_cost) = 40% of hardware_cost in 3 years? Any pointers will be appreciated.

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• Cannot find Power Management Tab in XP

  - by Andrew Heath

  I have the problem that when I send my computer to sleep it wakes if you bump the table, floor, burp etc. I have read many threads that say go to Device Manager Mouse Properties Power Management Tab and uncheck the box for wake. My problem is I do not have a Power Management Tab! Anyone know how to enable the tab or stop the mouse from waking my machine? And no, turning it upside down doesn't work either!

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• No power to HP pavilion dv 1000

  - by Imajica666

  I am working on a friends laptop. I get no power indicator light while plugged in to ac outlet. Will not power on with just the battery. Might this be a case of replacing the system board? I have never broken open a laptop so I am not sure what the best path to take might be. Thanks for any opinions.

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• My PC re-start when power comes back after a sudden power faliure.

  - by Papai

  I have run a iverter APC 800va in the main line with a battery exite tubler IT 500. Then a 600 VA UPS before the power to CPU. Now when the power goes there is no problem at all but when the amin supply come back then the problem ocures most of the time my PC re-start. Please help.

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• How to permanently save power options in windows 7

  - by Ieyasu Sawada

  How can I set the hard disk to never turn off permanently?And the sleep to never, together with the hibernate. Because the options resets to their default values when I turn off, log off or restart my computer. I am using granola on my laptop and it is set to lowest speed. When I restart it turns to full power again. Does it have something to do with the power options resetting to their default values?

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