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  • How can I improve the battery life under 12.04 on my Inspiron 14z? [duplicate]

    - by cfogelberg
    This question already has an answer here: Tips to extend battery life for laptops and notebooks 24 answers How do I improve the battery life of my Inspiron 14z under Ubuntu 12.04? This laptop gets 4-5 hours of battery life using Windows (e.g. here). I've removed Windows, installed Ubuntu 12.04 and the initial battery life was only 2 hours. With some tweaks (described below) it's still only ~2.5 hours. For reference, the laptop is the latest model of the 14z: i5-3337U processor 32GB MSATA, 500GB HDD (5400rpm) AMD Radeon HD7570M graphics card I have put ext4 partitions on both the SSD and the HDD, and have mounted / to the SSD and /home to the HDD. I also put a 24gb linux swap partition at the start of the HDD, though I figure this won't be used all that much (the laptop has 8gb of RAM). After googling around and reading Ask Ubuntu and other sites extensively, I have done the following steps, and they have improved the battery life ~30 minutes (exact improvement not clear, but battery life is still nowhere near 4-5 hours). Installed Jupiter (and set Performance to "Power Saving") Installed laptop-mode-tools cat /proc/sys/vm/laptop_mode now outputs 5 (previously it output 0) But it's not clear that this will help: AskUbuntu question Turned down the brightness of my screen from full to 1/3 Other things I have heard about but have not tried for fear of frying the laptop or my linux install: Add "pcie_aspm=force" at the end of the line with "quiet splash" in /boot/grub/grub.cfg Enable ALPM, but it may already be enabled in 12.04? Enable i915 framebuffer compression Use a propietary driver for the graphics card? Turn off the graphics card? (what would happen if I relied on the internal Intel bridge?) Use TLP? Spin down the HDD more aggressively (howto, but I think laptop-mode-tools does this already) The only other thing I've noticed is that plastic just above the F5, F6 and F7 keys gets really hot. According to Jupiter my CPU temperature is only 69 celsius and the System Monitor shows CPU load at 7% so I don't think it's the CPU. Maybe it's the graphics card? Also, I've set up MongoDB and LAMP on the machine as well. When I run powertop MongoDB is high in the list, but I'm not sure if that's relevant to battery life because I'm not actually doing anything with MongoDB most of the time. Edit - Additional info as requested $ lspci -nnk | grep -iEA3 "(graphics|vga)" 00:02.0 VGA compatible controller [0300]: Intel Corporation Ivy Bridge Graphics Controller [8086:0166] (rev 09) Subsystem: Dell Device [1028:057f] Kernel driver in use: i915 Kernel modules: i915 -- 02:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Thames [Radeon 7500M/7600M Series] [1002:6841] Subsystem: Dell Device [1028:057f] Kernel driver in use: radeon Kernel modules: radeon

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  • SEO - Search Engine Optimization Tips and Techniques

    SEO can be broken down into 2 main categories, on-page optimization, and off-page optimization. On-page optimization involves the changes that are made on your actual site, like through a CMS such as MODx. Changing heading tag, title tags, alt tags, etc., are all examples of on-page optimization. Off-page involves anything and everything that isn't actually done on your site, such as social media, blogs, forums, etc.

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  • Why did the command ":(){ :|: & };:" make my system lag so badly I had to reboot?

    - by blade19899
    Danger! Do not run this command to "test" it unless you are prepared for a crash and/or force-rebooting your system I was in my Virtualbox running 12.04 trying to compile an app, and while waiting I happened to chance upon a forum where a comment said: Try :(){ :|: & };: Fun, too, and doesn't need root. Without thinking I ran it in my gnome-terminal it made my 12.04 virtualbox lag so badly I had to shut it down. My question is what does this command do? :(){ :|: & };:

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  • How to make the most of GWT's "Search queries"?

    - by DisgruntledGoat
    I've been looking at the "Search queries" section in Google Webmaster Tools recently, and it seems like there is a lot of potential there in finding which pages on a site need improvement. I'm trying to figure out exactly what to sort or filter on. Do I look at pages with a low average position? Low impressions but high clicks? Pages that are rising up/falling down the rankings? What is the low-hanging fruit here?

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  • How to run an application using sudo without a password?

    - by tutuca
    ... but still be required for applications that need admin privilegies? In order to allow the following: $ apache2ctl restart httpd not running, trying to start (13)Permission denied: make_sock: could not bind to address 0.0.0.0:80 no listening sockets available, shutting down Unable to open logs $ sudo !! sudo apache2ctl restart #no password asked $ #works! For reference I've seen this setup on amazon's e3 instances Any idea?

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  • Article Submission For Back Links and SEO

    Article submission is obviously a massive tool when it comes to upping your SEO in your attempt to climb up the Google rankings and heighten your page rank. Does it help? Well, I haven't been doing it for very long but one thing is for sure it'll build your back links hands down.

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  • Search Engine Optimization Training - Do Not Make a Mistake in Choosing One

    Does Birmingham living have you stressed? Busy streets, heavy workloads got you down? However, 1 of the greatest things that you simply can get advantage from this place is that there are numerous Birmingham web design companies and Birmingham search engine optimization corporations that are willing to help you out with your online business. As everybody knows, Search engine optimization instruction plays an crucial role when it comes to setting up an online business.

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  • Oracle Magazine, March/April 2005

    Oracle Magazine March/April 2005 features articles on managing unstructured content, cooridinating business processes, Oracle's Austin Data Center, starting with Oracle ADF, Oracle XML Data Synthesis, SQL analytics, using materialized views, and much more.

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  • A quick look at: sys.dm_os_buffer_descriptors

    - by fatherjack
    SQL Server places data into cache as it reads it from disk so as to speed up future queries. This dmv lets you see how much data is cached at any given time and knowing how this changes over time can help you ensure your servers run smoothly and are adequately resourced to run your systems. This dmv gives the number of cached pages in the buffer pool along with the database id that they relate to: USE [tempdb] GO SELECT COUNT(*) AS cached_pages_count , CASE database_id ...(read more)

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  • Resolving "Error accessing a table..." Error

    Are you encountering an error message during DB2 database startup? Or during the execution of Alter Tablespace SQL command? If ';yes';, then the three possible reasons for the error message are, contai... [Author: Mark Willium - Computers and Internet - May 13, 2010]

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  • Quality SEO Services to Guarantee Your Online Popularity

    Internet Marketing strategies aim to give you the edge you need to succeed in the online scenario. Whether its business, outsourcing, or for popularity purposes, Internet Marketing aims to put you on top and keep your competitions down. Keep in mind that implementation of its strategies alone is not enough to guarantee that you're going to meet your goals. In most cases, you have to opt for expert implementation of quality SEO Services to ensure your success in the online setting.

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  • Designing Databases for Rapid Resilience

    As the volume of data increases, DBAs need to plan more actively for rapid restores in the event of failure. For this, the intelligent use of filegroups is important, particularly when the Enterprise Edition of SQL Server offers the hope of online restores. How, though, should you arrange your data on the different filegroups? What happenens if the primary filegroup gets corrupted? Why backup and restore indexes?

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  • Should we persist with an employee still writing bad code after many years?

    - by user94986
    I've been assigned the task of managing developers for a well-established company. They have a single developer who specialises in all their C++ coding (since forever), but the quality of the work is abysmal. Code reviews and testing have revealed many problems, one of the worst being memory leaks. The developer has never tested his code for leaks, and I discovered that the applications could leak many MBs with only a minute of use. User's were reporting huge slowdowns, and his take was, "it's nothing to do with me - if they quit and restart, it's all good again." I've given him tools to detect and trace the leaks, and sat down with him for many hours to demonstrate how the tools are used, where the problems occur, and what to do to fix them. We're 6 months down the track, and I assigned him to write a new module. I reviewed it before it was integrated into our larger code base, and was dismayed to discover the same bad coding as before. The part that I find incomprehensible is that some of the coding is worse than amateurish. For example, he wanted a class (Foo) that could populate an object of another class (Bar). He decided that Foo would hold a reference to Bar, e.g.: class Foo { public: Foo(Bar& bar) : m_bar(bar) {} private: Bar& m_bar; }; But (for other reasons) he also needed a default constructor for Foo and, rather than question his initial design, he wrote this gem: Foo::Foo() : m_bar(*(new Bar)) {} So every time the default constructor is called, a Bar is leaked. To make matters worse, Foo allocates memory from the heap for 2 other objects, but he didn't write a destructor or copy constructor. So every allocation of Foo actually leaks 3 different objects, and you can imagine what happened when a Foo was copied. And - it only gets better - he repeated the same pattern on three other classes, so it isn't a one-off slip. The whole concept is wrong on so many levels. I would feel more understanding if this came from a total novice. But this guy has been doing this for many years and has had very focussed training and advice over the past few months. I realise he has been working without mentoring or peer reviews most of that time, but I'm beginning to feel he can't change. So my question is, would you persist with someone who is writing such obviously bad code?

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  • Ubuntu 14.04 Slow, High CPU Usage

    - by user273012
    I experienced CPU strange behavior after installing Ubuntu 14.04, at 5 or 10 minutes, CPU usage suddenly increased about 50%, that's really slow my laptop down (Ubuntu 13.10 worked fine by the way) Here is my laptop specs : ASUS A43SA Intel Core i3-2330M 2.20 GHz 4 GB of RAM I noticed this when the first installation, even after I disabled online and file search, even after I switch to GNOME 3, and even after I used GNOME Fallback Session, how to solve this?

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  • Increasing Your Google Website Ranking

    Your Google website ranking is directly related to the amount of traffic that comes into your site. Without being displayed on the site, which is the most dominant search engine on the internet, even the best planned SEO campaign can go down the drain. Learning to "make friends" with Google and work within its rules can lead to a far higher profit margin.

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  • Linux users are hate filled criminal hackers

    <b>Technology & Life Integration:</b> "It always grates me when the discussion gets down to how rotten Windows is because of all the viruses etc. when it seems obvious, at least to Windows users, that most of that crap is written by Linux devotees."

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  • Windows Azure from a Data Perspective

    Before creating a data application in Windows Azure, it is important to make choices based on the type of data you have, as well as the security and the business requirements. There are a wide range of options, because Windows Azure has intrinsic data storage, completely separate from SQL Azure, that is highly available and replicated. Your data requirements are likely to dictate the type of data storage options you choose.

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  • Redesigning an Information System - Part 1

    - by dbradley
    Through the next few weeks or months I'd like to run a small series of articles sharing my experiences from the largest of the project I've worked on and explore some of the real-world problems I've come across and how we went about solving them. I'm afraid I can't give too many specifics on the project right now as it's not yet complete so you'll have to forgive me for being a little abstract in places! To start with I'm going to run through a little of the background of the problem and the motivations to re-design from scratch. Then I'll work through the approaches taken to understanding the requirements, designing, implementing, testing and migrating to the new system. Motivations for Re-designing a Large Information System The system is one that's been in place for a number of years and was originally designed to do a significantly different one to what it's now being used for. This is mainly due to the product maturing as well as client requirements changing. As with most information systems this one can be defined in four main areas of functionality: Input – adding information to the system Storage – persisting information in an efficient, searchable structure Output – delivering the information to the client Control – management of the process There can be a variety of reasons to re-design an existing system; a few of our own turned out to be factors such as: Overall system reliability System response time Failure isolation and recovery Maintainability of code and information General extensibility to solve future problem Separation of business and product concerns New or improved features The factor that started the thought process was the desire to improve the way in which information was entered into the system. However, this alone was not the entire reason for deciding to redesign. Business Drivers Typically all software engineers would always prefer to do a project from scratch themselves. It generally means you don't have to deal with problems created by predecessors and you can create your own absolutely perfect solution. However, the reality of working within a business is that the bottom line comes down to return on investment. For a medium sized business such as mine there must be actual value able to be delivered within a reasonable timeframe for any work to be started. As a result, any long term project will generally take a lot of effort and consideration to be approved by those in charge and therefore it might be better to break down the project into more manageable chunks which allow more frequent deliverables and also value within a shorter timeframe. As the only thing of concern was the methods for inputting information, this is where we started with requirements gathering and design. However knowing that there might be more to the problem and not limiting your design decisions before the requirements is key to finding the best solutions.

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