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  • Fans running very fast on MacBook Pro 8.1 ubuntu 12.04

    - by Tomasz Kacprzak
    I installed Ubuntu 12.04 on Macbook Pro 8.1 and one of the first things I noticed was that the fans were starting to spin very fast every few minutes for 10-30 sec and then going back to normal. That was happening even without any processor load, when completely idle. The fans were usually spinning at 4000 RPM and made much noise. The computer was not getting hotter than usual. When running OSX Lion there was no noise at all, fans almost all the time at 2000 RPM. I spent some time on it and found out that Precise uses a deamon to control the temperature, called macfanctld. You can use /etc/macfanctld.conf to set the configuration. I found out that the high fan speed is not due to the fact that the temperature is getting hot, but because there are two sensors which indicate wrong numbers (you can check that using 'sensors' command ): TW0P: +129.0°C TCTD: +256.0°C TCFC: +0.0°C TMBS: +0.0°C or setting the macfanctld log level to 2: Speed: 4992, *AVG: 56.9C, TC0P: 50.2C, TG0P: 51.5C, Sensors: TB0T:34 TB1T:34 TB2T:33 TC0C:58 TC0D:56 TC0E:59 TC0F:60 TC0P:50 TC1C:58 TC2C:58 TC3C:58 TC4C:57 TCFC:0 TCGC:57 TCSA:53 TCTD:256 TG0D:52 TG0P:52 THSP:42 TM0S:64 TMBS:0 TP0P:54 TPCD:60 TW0P:129 Th1H:51 Th2H:48 Tm0P:40 Ts0P:32 Ts0S:43 Moreover, TCTD was randomly jumping from temperatures of 0 to 256, so this may be the reason for unjustified random fan speeds. macfanctld is taking an average of the sensors including the values above, so the actual AVG temp used to control the fans is wrong, usually biased up, hence high RPM and noise. The workaround solution is to use an option in the macfanctld.conf which allows to ignore the malfunctioning sensors: exclude: 13 16 21 24 After reboot the reported temperatures are usually normal and the fans are working at reasonable speeds. I tested the response of the fans to heavy processor load by asking MATLAB to invert 10000x10000 matrix and the AVG temperature jumped to 63deg, and the fan to max 6200 RPM and then got it back to normal temperature. So I think it is safe so far. There is a expired bug about the failing sensor readings: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/955538 which may be good to open again. My question would be: does anyone know what the failing sensors do and if there is any danger in excluding them? Maybe some better solution to this problem?

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  • No sound for headphones

    - by Joel Lino
    I was trying some of the solutions published in this forum for the same problem, but just one in particular work for me: add the line of code in the file alsa-base.conf. This just works for a few days, now the problem is back again. Any solution to fix this problem for good? Compaq Presario CQ40 $ lspci | grep -i audio 00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA) 01:05.1 Audio device: ATI Technologies Inc RS780 Azalia controller

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  • How far should an entity take care of its properties values by itself?

    - by Kharlos Dominguez
    Let's consider the following example of a class, which is an entity that I'm using through Entity Framework. - InvoiceHeader - BilledAmount (property, decimal) - PaidAmount (property, decimal) - Balance (property, decimal) I'm trying to find the best approach to keep Balance updated, based on the values of the two other properties (BilledAmount and PaidAmount). I'm torn between two practices here: Updating the balance amount every time BilledAmount and PaidAmount are updated (through their setters) Having a UpdateBalance() method that the callers would run on the object when appropriate. I am aware that I can just calculate the Balance in its getter. However, it isn't really possible because this is an entity field that needs to be saved back to the database, where it has an actual column, and where the calculated amount should be persisted to. My other worry about the automatically updating approach is that the calculated values might be a little bit different from what was originally saved to the database, due to rounding values (an older version of the software, was using floats, but now decimals). So, loading, let's say 2000 entities from the database could change their status and make the ORM believe that they have changed and be persisted back to the database the next time the SaveChanges() method is called on the context. It would trigger a mass of updates that I am not really interested in, or could cause problems, if the calculation methods changed (the entities fetched would lose their old values to be replaced by freshly recalculated ones, simply by being loaded). Then, let's take the example even further. Each invoice has some related invoice details, which also have BilledAmount, PaidAmount and Balance (I'm simplifying my actual business case for the sake of the example, so let's assume the customer can pay each item of the invoice separately rather than as a whole). If we consider the entity should take care of itself, any change of the child details should cause the Invoice totals to change as well. In a fully automated approach, a simple implementation would be looping through each detail of the invoice to recalculate the header totals, every time one the property changes. It probably would be fine for just a record, but if a lot of entities were fetched at once, it could create a significant overhead, as it would perform this process every time a new invoice detail record is fetched. Possibly worse, if the details are not already loaded, it could cause the ORM to lazy-load them, just to recalculate the balances. So far, I went with the Update() method-way, mainly for the reasons I explained above, but I wonder if it was right. I'm noticing I have to keep calling these methods quite often and at different places in my code and it is potential source of bugs. It also has a detrimental effect on data-binding because when the properties of the detail or header changes, the other properties are left out of date and the method has no way to be called. What is the recommended approach in this case?

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  • JavaOne 2013: (Key) Notes of a conference – State of the Java platform and all the roadmaps by Amis

    - by JuergenKress
    Last week’s JavaOne conference provided insights in the roadmap of the Java platform as well as in the current state of things in the Java community. The close relationship between Oracle and IBM concerning Java, the (continuing) lack of such a relationship with Google, the support from Microsoft for Java applications on its Azure cloud and the vibrant developer community – with over 200 different Java User Groups in many countries of the world. There were no major surprises or stunning announcements. Java EE 7 (release in June) was celebrated, the progress of Java 8 SE explained as well as the progress on Java Embedded and ME. The availability of NetBeans 7.4 RC1 and JDK 8 Early Adopters release as well as the open sourcing of project Avatar probably were the only real news stories. The convergence of JavaFX and Java SE is almost complete; the upcoming alignment of Java SE Embedded and Java ME is the next big consolidation step that will lead to a unified platform where developers can use the same skills, development tools and APIs on EE, SE, SE Embedded and ME development. This means that anything that runs on ME will run on SE (Embedded) and EE – not necessarily the reverse because not all SE APIs are part of the compact profile or the ME environment. However, the trimming down of the SE libraries and the increased capabilities of devices mean that a pretty rich JVM runs on many devices – such as JavaFX 8 on the Raspberry PI. The major theme of the conference was Internet of Things. A world of things that are smart and connected, devices like sensors, cameras and equipment from cars, fridges and television sets to printers, security gates and kiosks that all run Java and are all capable of sending data over local network connections or directly over the internet. The number of devices that has these capabilities is rapidly growing. This means that the number of places where Java programs can help program the behavior of devices is growing too. It also means that the volume of data generated is expanding and that we have to find ways to harvest that data, possibly do a local pre-processing (filter, aggregate) and channel the data to back end systems. Terms typically used are edge devices (small, simple, publishing data), gateways (receiving data from many devices, collecting and consolidating, pre-processing, sending onwards to back end – typically using real time event processing) and enterprise services – receiving the data-turned-information from the gateways to further consolidate, distribute and act upon. A cheap device like the Raspberry PI is a perfect way to get started as a Java developer with what embedded (device) programming means and how interaction with physical input and output takes place. Roadmaps The over all progress on Java is visualized in this overview: Read the full article here. WebLogic Partner Community For regular information become a member in the WebLogic Partner Community please visit: http://www.oracle.com/partners/goto/wls-emea ( OPN account required). If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Wiki Technorati Tags: Amis,OOW,Oracle OpenWorld,JavaOne,WebLogic,WebLogic Community,Oracle,OPN,Jürgen Kress

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  • As a self-taught programmer, how do I get the academic foundation without attending school again?

    - by hal10001
    I've made a pretty good living as a self-taught programmer, but when I find that I discuss some low-level fundamental topics with my peers who have a CS degree, holes appear in my knowledge. I'm a big picture (architecture) guy, so for a long time this hasn't bothered me, but lately I've wondered if there is an approach I can take that will help me learn these fundamentals without going back to school? Are there books, websites or videos that you can recommend that would give me a ground-up perspective as opposed to a learn it as you need it mentality?

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  • PCLinuxOS 2010 (KDE) Review

    <b>Desktop Linux Reviews:</b> "The last time I looked at PCLinuxOS was back in 2009 when I was working full-time for ExtremeTech. There's a new release out and it's a good time for a review of it here on DLR."

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  • Access Control Lists for Roles

    - by Kyle Hatlestad
    Back in an earlier post, I wrote about how to enable entity security (access control lists, aka ACLs) for UCM 11g PS3.  Well, there was actually an additional security option that was included in that release but not fully supported yet (only for Fusion Applications).  It's the ability to define Roles as ACLs to entities (documents and folders).  But now in PS5, this security option is now fully supported.   [Read More]

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  • How do you enable wobbly windows in ubuntu 11.04 without using compiz?

    - by Tripod Smurf
    I'm curious if there's a way to enable the more fun UI features in Ubuntu 11.04 that were available in previous versions. The effects I'm most curious about is the wobbly windows and the alt tab program switcher that looked like a rolodex. Those things were delightful. I've been reading about the compiz tool and since I'm a pretty noob user, I don't think I want to risk destroying my desktop for a chance to get these effects back. Any help would be appreciated. Thanks

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  • How do I make this ad execution?

    - by Maggie
    I am doing research on replicating an ad execution - http://www.digitalbuzzblog.com/gol-airlines-mobile-controlled-banner-game/ It's a simple "game" involving using the phone as a forward/back/left/right controller for a car in flash on the internet. I've started reading on P2P, but I'm finding such a vast amount of information and non specific to what I need that it's hard for me to sort through. Does anyone know any tutorials or can shed some light on how I might go about making a very simple mobile controller for a flash game?

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  • Pros and Cons of various career paths [closed]

    - by Snitse
    What are the advantages and disadvantages of various career paths within CS? By a path I mean something like: Web Development GUI Development Sys admin/DB admin/network admin Security (maybe should be grouped with sys admin) Programming back end (like a C programmer) Algorithm Development heavy programming And any other you think should be in this list. What are the various areas in which each of these professions excels, or lags?

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  • Why can't 12.04 installer see one of my hard drives

    - by imparatore
    I'm trying to install Ubuntu 12.04 32-bit from a USB pen drive. I have two drives, a WD Caviar Black and a Samsung SPC250. At the "installation type" stage, it only sees my Samsung and the USB pen drive, not the WD. I checked the drive with gparted and everything seems fine. I tried the alternate installer but that doesn't work either I tried changing from IDE to AHCI in the BIOS and back What can I do now?

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  • Unity 3D Display Lag

    - by ec2011
    I find that there is quite a lot of lag when using Unity after upgrading to Precise. It seems that when I first start up the computer, everything is fine, but then if I put the computer on standy for a while and then come back to it, the display is extremely slow and there is a significant delay to visual effects that make the system rather cumbersome to use. I tried to report this as a bug but then bug reporting tool directed me to ask this is a question here first. Thanks for any ideas

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  • Easy road from DisplayObject to Molehill?

    - by Bart van Heukelom
    I have a finished Flash game which is rendered using the built-in display tree, i.e. Bitmaps contained in Sprites (and a text here and there, few vector graphics, and one bitmap-filled shape). For extra performance, I'd like it to use Molehill for rendering, but that's not possible out of the box. What's the easiest way to make this game use Molehill when available, but fall back to the current method if it's not available?

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  • ubuntu 12.04 LTS no sound

    - by harlie
    I just reinstalled ubuntu 12.04 from a DVD that came in the Ubuntu User magazine. I previously had 13.04 but had decided to revert back to the LTS. Now with 12.04 I have no sound when I try to play my music, I tried using Musique and also Rhythm Box they both show playing with the slider but no sound is heard except if the volume is all the way up you can hear a faint hiss or static. Any advice on how to fix this? Thanks Harlie

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  • Set and Verify the Retention Value for Change Data Capture

    - by AllenMWhite
    Last summer I set up Change Data Capture for a client to track changes to their application database to apply those changes to their data warehouse. The client had some issues a short while back and felt they needed to increase the retention period from the default 3 days to 5 days. I ran this query to make that change: sp_cdc_change_job @job_type='cleanup', @retention=7200 The value 7200 represents the number of minutes in a period of 5 days. All was well, but they recently asked how they can verify...(read more)

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  • Crash During Update Deleted ALL panels; can't open terminal; can't see icons

    - by Evan
    So I was upgrading Ubuntu from 11.10 to 12.04 in the terminal after recovering my system from a previous crash, and then I go through a power outage during the second time trying to update. NOW, my screen is white, only the time shows up in the top right corner, no icons show up, no apps show up, AND terminal is NOT opening. I can still use the internet somehow, and ctrl + alt + F2 opens what I think is a back-up terminal? NEED HELP to recover what is lost.

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  • I can't autostart xfce4 power manger lubuntu 13.10

    - by user203766
    I just upgraded my 64 bit lubuntu to 13.10 on my netbook today. After the upgrade, I simply can't autostart the xfce4 power manager. I tried to add from the desktop session settings, I tried to copy the power manager.desktop file to ~/.config/autostart folder. Everything looks fine, than I logout, log back in, and the darn power manager, just won't start automatically. It only starts when I double click the icon, or if i start it from the terminal. Help me please

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  • Google Games Chat, Episode #9

    Google Games Chat, Episode #9 The Google Games Chat (official motto: "Way less fun than actually playing games") is back! We're hoping to deliver another exciting discussion about industry trends and hot new game-related technologies, but there's a pretty good chance it'll just devolve into 45 minutes of awkward silence. From: GoogleDevelopers Views: 0 5 ratings Time: 03:00:00 More in Science & Technology

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  • What do you do when working with multiple languages with different capitalization schemes?

    - by dvcolgan
    I'm making a webapp using Django. The Python convention for naming variables is lowercase_with_underscores, but the Javascript convention is camelCase. In addition, I've seen many people use lowercase-with-hyphens for CSS identifiers. Would you suggest using all three naming conventions where appropriate, or picking one and using it, even if the other two recommend something else? Switching back and forth isn't a huge problem, but it can still be mental overhead.

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  • How do you demonstrate performance in paired-programming environments?

    - by NT3RP
    Performance reviews have come up recently at my work, and I was put in an interesting position. Our team does a lot of pair programming, which has a tendency of averaging out the skill differences between team members (especially considering we rotate pairs). Generally, when doing performance reviews, you look back at the work you've done, and demonstrate what you've accomplished, and how you've exceeded expectations to try to negotiate a raise or other benefits. How do you demonstrate (or even measure) individual performance in an environment like this?

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  • How do I not show files on the main screen

    - by ChuckMcM
    Ok, so I upgraded to 12.10 and have been trying out Unity, my screen has become a complete mess of folders and files. "Back in the day" the folders that were on my screen were the ones shown in the .Desktop directory now it seems like all the files in my login directory are there (that is a lot of files) Is there some way to set the files being diplayed to come from a specific directory? if so how? I think I've gone through every panel of the system settings application.

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