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  • How To View Upcoming Weather, Sports Games, TV Shows, and More in Google Calendar

    - by Chris Hoffman
    Google Calendar isn’t just a tool to keep track of your own events. You can subscribe to a number of special calendars that automatically update with the latest weather, sports games, air times for your favorite TV shows, and more. This is the sort of thing that a paper calendar could never do, and what makes digital calendars like Google Calendar so useful. Add some automatically updating calendars and you’ll wonder how people ever used paper calendars. HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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  • How do I get my HP M1132 printer to work?

    - by Lucas
    I connected my printer to the computer and Ubuntu 12.04recognized it and installed it, but when I try to print something, the printer just gives a signal as if the document had already been printed and nothing happens, and at the printing queue the job is still there as "Processing - Not Connected?" or "Stopped". The printer is working fine on Microsoft Windows and I am sure it is connected. In the status field in the printer properties, it says: Processing - /usr/lib/cups/filter/hpcups failed. I'd like someone to please teach me how to get this printer (and it's scanner) working on Ubuntu.

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  • How to document and teach others "optimized beyond recognition" computationally intensive code?

    - by rwong
    Occasionally there is the 1% of code that is computationally intensive enough that needs the heaviest kind of low-level optimization. Examples are video processing, image processing, and all kinds of signal processing, in general. The goals are to document, and to teach the optimization techniques, so that the code does not become unmaintainable and prone to removal by newer developers. (*) (*) Notwithstanding the possibility that the particular optimization is completely useless in some unforeseeable future CPUs, such that the code will be deleted anyway. Considering that software offerings (commercial or open-source) retain their competitive advantage by having the fastest code and making use of the newest CPU architecture, software writers often need to tweak their code to make it run faster while getting the same output for a certain task, whlist tolerating a small amount of rounding errors. Typically, a software writer can keep many versions of a function as a documentation of each optimization / algorithm rewrite that takes place. How does one make these versions available for others to study their optimization techniques?

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  • Designing exceptions for conversion failures

    - by Mr.C64
    Suppose there are some methods to convert from "X" to "Y" and vice versa; the conversion may fail in some cases, and exceptions are used to signal conversion errors in those cases. Which would be the best option for defining exception classes in this context? A single XYConversionException class, with an attribute (e.g. an enum) specifying the direction of the conversion (e.g. ConversionFromXToY, ConversionFromYToX). A XYConversionException class, with two derived classes ConversionFromXToYException and ConversionFromYToXException. ConversionFromXToYException and ConversionFromYToXException classes without a common base class.

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  • Problem installing skype on ubuntu 12.10 : Error in sound packages

    - by damned
    I tried to install Skype on my ubuntu 12.10 via command line $ sudo apt-get install skype I received this error : The following packages have unmet dependencies: libasound2-plugins:i386 : Depends: libasound2:i386 (>= 1.0.25) but it is not going to be installed skype-bin:i386 : Depends: libasound2:i386 (>= 1.0.23) but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). When I tried the suggestion, $ sudo apt-get -f install I get the following error : Unpacking libasound2:i386 (from .../libasound2_1.0.25-3ubuntu3_i386.deb) ... dpkg: error processing /var/cache/apt/archives/libasound2_1.0.25-3ubuntu3_i386.deb (--unpack): trying to overwrite shared '/usr/share/alsa/alsa.conf', which is different from other instances of package libasound2:i386 No apport report written because MaxReports is reached already dpkg-deb: error: subprocess paste was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/libasound2_1.0.25-3ubuntu3_i386.deb E: Sub-process /usr/bin/dpkg returned an error code (1) Configuration of my ubuntu is as follows : $ uname -a Linux sumitb-pc 3.5.0-21-generic #32-Ubuntu SMP Tue Dec 11 18:51:59 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Please help me out here ! :)

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  • GtkFileChooserButton 'Select Folder' mode returns no path

    - by user8592
    I have added a GtkFileChooserButton to my app via Glade. It is set to folder selection mode. When the widget is clicked it shows a dropdown list of Nautilus bookmarks with an 'other' option in the end. A new file chooser dialog is launched when 'other' is clicked. The button is not connected to any other custom file chooser dialog. The connecting signal I am using is 'file-set' and I am retrieving the fullpath of user selected folder using Gtk.FileChooser.get_current_folder (). This setup works fine if user selects a folder from 'other' option. But if a user selects a bookmark from dropdown list, no path is returned. How to solve this? Is there a way to disable this dropdown list and directly go to the filechooser dialog? I want to use GtkFileChooserButton only so that the user can get a preview of his selected folder.

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  • HDMI Audio stops after TV turned off

    - by Ryan
    After the 12.04 Update my HDMI audio stops working anytime I turn off my 2nd monitor(plasma TV). Graphics card is a Radeon 6800 which has DVI out to 1st monitor, HDMI out to receiver which the TV gets it's Audio/Video. Audio is always via my receiver sound. Things work fine as long as it boots with the TV and Receiver on. Turn off the TV and BART's HDMI audio will go away, and the HDMI option vanishes from the sound menu. I had an occasional HDMI issue with 11.10 but turning on/off the TV would fix the sound. How can I hardcode things so that it always uses HDMI out of audio? I suspect the TV is sending a signal upon that 12.04 is now listening for. Turning the TV back on does NOT resolve this, and I'd suggest having the ability to override this new "feature" via sound menu.

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  • 5.1 surround sound for 12.04

    - by iwhorl
    I am very new to Ubuntu and linux as I have used windows only until yesterday. I am attempting to send my audio signal to my pioneer reciever using a single digital optical cable which is plugged into my M2N Sli Deluxe motherboard. I am sending video with a Geforce 8600gt video card through HDMI. That card does not support audio through HDMI. The only thing I have got to work so far is my left channel speaker acts as a stereo left and my sub woofer is trying to act as a stereo right. I was able to achieve this through altering the alsamixer settings. Can anyone point me in the right direction on this?

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  • how to deal with parallel programming

    - by nkint
    Hi. I know that parallel programming is a big resource in computer graphics, with moder machines, and mayebe a computing model that will be grow up in the near future (is this trend true?). I want to know what is the best way to deal with it. there is some practical general purpose usefulness in studying processor n-dimensional mesh, or bitonic sort in p-ram machines or it's only theory for domain specific hardware used in real particular signal elaborations of scientific simulations? Is this the best way to acquire the know how for how to become acquainted with cuda or opencl? (i'm interested in computer graphics applications) and why functional programming is so important to understand parallel computing? ps: as someone has advice me i have forked this discussion from http://stackoverflow.com/questions/4908677/how-to-deal-with-parallel-programming

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  • What To Do If You Get a Virus on Your Computer

    - by Chris Hoffman
    Whether you saw a message saying a virus was detected or your computer seems slow and unreliable, this guide will walk you through the process of dealing with your infection and removing the malware. While many viruses and other types of malware are designed simply to cause chaos, more and more malware is used by organized crime to steal credit card numbers and other sensitive data. Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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  • How do you deal with information overload?

    - by talonx
    There are so many (good) programming blogs out there. Some of them are consistent in what they post - as in they stick to programming topics. Some of them occasionally post on other unrelated topics. Also, not every programming post might be relevant to me. I might have read one good post once, and not wishing to miss any future good ones - subscribed to the blog. Subscribing to too many blog feeds usually leads to just skimming through all of them (which takes time as well). Another option might be to subscribe to aggregators, like Hacker News - but that too has a huge rate of link accumulation. How do you manage if you wish to keep up with the programming blogosphere and still maintain a good signal to noise ratio?

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  • Lubuntu 14.04 Problem starting lxsession-default-apps

    - by user278179
    I have one problem, I can't execute lxsession-default-apps on Lubuntu 14.04 because I get because said to me "The database is updating, please wait" If I try to run lxsession-default-apps, I get this error: ** Message: utils.vala:30: config_path_directory: /home/USER/.config/lxsession-default-apps ** Message: desktop-files-backend.vala:171: test config_path: /home/USER/.config/lxsession-default-apps/settings.conf ** Message: desktop-files-backend.vala:237: Scanning folder: /usr/share/applications ** Message: desktop-files-backend.vala:278: Start scanning ** Message: desktop-files-backend.vala:257: Scanning folder: /usr/share/app-install/desktop ** Message: desktop-files-backend.vala:278: Start scanning Error: list_files failed: No such file or directory ** Message: desktop-files-backend.vala:333: Finishing scanning ** Message: desktop-files-backend.vala:189: Signal finish scanning with mode: write ** Message: desktop-files-backend.vala:333: Finishing scanning Any help would be appreciated. Thanks. Regards.

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  • problem connecting to wifi at long range

    - by user171849
    I am using a compaq 8510p with internal wifi. The campground supplies an open wifi hotspot, to which I can connect at close range (30 ft) but not at longer range (300 ft). Connecting a usb dongle just confuses things. The dongle tries to lock on to all the wifi networks in my vicinity. They are password protected, but my laptop still tries to connect. I connected a cantenna via usb port and got a signal which said I was connected, but all web pages returned error 'unable to connect to server', despite having three bars showing on the wifi icon. I believe it because the installed wifi card interacts with the usb dongle. If so what can I do about it? I am using Ubuntu 12.04.

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  • Computer Freezes After GRUB

    - by paulmcg421
    Ok so I've just built my first computer and have got it running, here are the specs: Asus P8Z68-V PCI-E LX Motherboard, Intel Core i5-2500K, Patriot Memory 8GB (2 x 4GB), Viper Xtreme Series PC3-15000 1866MHz CL9 Division 2 Edition Memory (PXD38G1866ELK), Gigabyte ATI Radeon 6850 820MHz 1GB PCI-E HDMI OC Windforce 2x 500w Ezcool 24pin psu as standard. The only thing I haven't bought new is the hard drive, it's a 250gb that I removed from an Acer Aspire M5100 that I was using till now with no OS Problems. On start up it runs fine but is unresponsive after the GRUB menu disappears to load Ubuntu (Oneric Ocelot). The keyboard lights then turn off and the screen eventually returns that there is no signal. Is there anything that I could be missing from building? (This is my first attempt at building my own PC) Any input would be appreciated, thanks !

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  • HTG Explains: Live File System vs. Mastered Disc Formats in Windows

    - by Chris Hoffman
    When burning a CD or DVD with Windows, you’ll be asked whether you want to use a Live File System or a Mastered disc format. Each has its own advantages and disadvantages. Windows 7 refers to this as “Like a USB flash drive” or “With a CD/DVD player.” But how exactly can a non-rewritable disc function like a USB flash drive? HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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  • How Hot Can It Get? [Video]

    - by Asian Angel
    The coldest temperature possible is zero degrees Kelvin, but how hot do you think it can actually get? Watch as Vsauce discusses the varying levels of temperatures, what happens at those levels, and ends with the hottest possible temperature known to humanity. How Hot Can It Get? [via Geeks are Sexy] Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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  • How to fix slow wireless with Intel 4965 AGN? [closed]

    - by mikewhatever
    Possible Duplicate: Slow wireless with an Intel 4965 We run Ubuntu 12.04, 32bit, with the current kernel 3.2.27-generic on an MSI EX700. I've already added the 11n_disable=1 tweek, without whcih, wireless has been unusable. Now, it works OK, but speedtest shows: Windows XP - down 11.68mbps, up 2.07mbps Ubuntu 12.04 - down 2.06mbps up 2.0mbps We've disabled ipv6, tried static and dinamic IPs, tried both swcrypto=0 and swcrypto=1 options, none of whcih made any difference. The problem may be the symptom of high packet loss. For example, here's the output of iwconfig after booting and testing the speeds: wlan0 IEEE 802.11abg ESSID:"amu" Mode:Managed Frequency:2.462 GHz Access Point: 00:78:9E:FA:32:C8 Bit Rate=54 Mb/s Tx-Power=15 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:off Link Quality=58/70 Signal level=-52 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:11 Invalid misc:3627 Missed beacon:0 I've posted a help request before with lots of technical info and outputs.

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  • can not get Toshiba tv to full resolution

    - by Tloc2077
    I have a 23inch Toshiba model#23L1350U that I am using as a computer monitor via VGA plug; it is a full 1080P resolution TV but in Ubuntu it shows up as a Toshiba 72inch Television and wont go past the resolution 1366 by 1768. Has anyone came up with a solution to this problem..I used to get full 1080 resolution with my Insignia 32 inch TV so I know my hardware can push the signal, I am running a Radeon x1550 graphics cars 3200+ processor on a 756 chip set 64bit version of Ubuntu 13.04 your help is greatly appreciated and you may or may not be compensated for your time

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  • How To Enable Do Not Track In Every Web Browser

    - by Chris Hoffman
    We’ve covered why “Do Not Track” isn’t a silver bullet that prevents you from being tracked. However, if you don’t like being tracked and want to express that preference to websites, you can enable “Do Not Track” in every browser. To Google’s credit, future versions of Chrome explain exactly what Do Not Track does when you enable it. Remember that, by enabling Do Not Track, you’re just expressing a preference. Websites may or may not obey your preference. Why Enabling “Do Not Track” Doesn’t Stop You From Being Tracked HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference

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  • Angry Birds and Star Wars Join Forces for an Awesome New Edition [Plus Wallpaper!]

    - by Asian Angel
    Are you ready for a new version of Angry Birds? Then rejoice, you are less than a month away from an awesome new release of everyone’s favorite bird-slinging, pig smashing game! Prepare for a journey to a galaxy far, far away… From the blog post: From the deserts of Tatooine to the depths of the Death Star – the game and merchandise will feature the Angry Birds characters starring as the iconic heroes of the beloved Saga. In the coming weeks, fans can expect additional new videos, characters, and much more exciting content to be revealed. The game will be available on iOS, Android, Amazon Kindle Fire, Mac, PC, Windows Phone and Windows 8. Here is the first of the promo videos for the new version. Also, make sure to download the first official wallpaper (linked to below)! How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems 7 Ways To Free Up Hard Disk Space On Windows

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  • tty1 prompt before lightdm

    - by David Weldon
    After upgrading to 13.10, every time I boot I'm shown a login prompt (tty1) for ~30 seconds before lightdm automatically starts. Everything works fine after that. Any ideas on what I could try to fix/debug this? My /var/log/lightdm/x-0-greeter.log contains lines like the following: ** (at-spi2-registryd:1381): WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files ** (at-spi2-registryd:1381): WARNING **: Unable to register client with session manager WARNING: Failed to open sessions directory: Error opening directory '/usr/share/lightdm/sessions': No such file or directory ** Message: PID 1534 (we are 1534) sent signal 15, shutting down... ** (gnome-settings-daemon:1401): WARNING **: Name taken or bus went away - shutting down Searching for these errors results in a variety of bugs filed over the years. Maybe a clean install will fix this.

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  • How to get audio spectrum analysis?

    - by Mrwolfy
    I need to find or create a tool that analyzes the audio spectrum of a sound file (like a .wav or .mp3). I need to output the "volume" or power of x number of frequency bands and output the data as text. This will be used to produce a visualization, a graphic equalizer like you'd see on a stereo. I am currently looking at python to do it. My question is are there some tools out there that would do this (signal processing), like math works or others? I don't have any experience with them so any advice would be appreciated.

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  • How can I implement a database TableView like thing in C++?

    - by Industrial-antidepressant
    How can I implement a TableView like thing in C++? I want to emulating a tiny relation database like thing in C++. I have data tables, and I want to transform it somehow, so I need a TableView like class. I want filtering, sorting, freely add and remove items and transforming (ex. view as UPPERCASE and so on). The whole thing is inside a GUI application, so datatables and views are attached to a GUI (or HTML or something). So how can I identify an item in the view? How can I signal it when the table is changed? Is there some design pattern for this? Here is a simple table, and a simple data item: #include <string> #include <boost/multi_index_container.hpp> #include <boost/multi_index/member.hpp> #include <boost/multi_index/ordered_index.hpp> #include <boost/multi_index/random_access_index.hpp> using boost::multi_index_container; using namespace boost::multi_index; struct Data { Data() {} int id; std::string name; }; struct row{}; struct id{}; struct name{}; typedef boost::multi_index_container< Data, indexed_by< random_access<tag<row> >, ordered_unique<tag<id>, member<Data, int, &Data::id> >, ordered_unique<tag<name>, member<Data, std::string, &Data::name> > > > TDataTable; class DataTable { public: typedef Data item_type; typedef TDataTable::value_type value_type; typedef TDataTable::const_reference const_reference; typedef TDataTable::index<row>::type TRowIndex; typedef TDataTable::index<id>::type TIdIndex; typedef TDataTable::index<name>::type TNameIndex; typedef TRowIndex::iterator iterator; DataTable() : row_index(rule_table.get<row>()), id_index(rule_table.get<id>()), name_index(rule_table.get<name>()), row_index_writeable(rule_table.get<row>()) { } TDataTable::const_reference operator[](TDataTable::size_type n) const { return rule_table[n]; } std::pair<iterator,bool> push_back(const value_type& x) { return row_index_writeable.push_back(x); } iterator erase(iterator position) { return row_index_writeable.erase(position); } bool replace(iterator position,const value_type& x) { return row_index_writeable.replace(position, x); } template<typename InputIterator> void rearrange(InputIterator first) { return row_index_writeable.rearrange(first); } void print_table() const; unsigned size() const { return row_index.size(); } TDataTable rule_table; const TRowIndex& row_index; const TIdIndex& id_index; const TNameIndex& name_index; private: TRowIndex& row_index_writeable; }; class DataTableView { DataTableView(const DataTable& source_table) {} // How can I implement this? // I want filtering, sorting, signaling upper GUI layer, and sorting, and ... }; int main() { Data data1; data1.id = 1; data1.name = "name1"; Data data2; data2.id = 2; data2.name = "name2"; DataTable table; table.push_back(data1); DataTable::iterator it1 = table.row_index.iterator_to(table[0]); table.erase(it1); table.push_back(data1); Data new_data(table[0]); new_data.name = "new_name"; table.replace(table.row_index.iterator_to(table[0]), new_data); for (unsigned i = 0; i < table.size(); ++i) std::cout << table[i].name << std::endl; #if 0 // using scenarios: DataTableView table_view(table); table_view.fill_from_source(); // synchronization with source table_view.remove(data_item1); // remove item from view table_view.add(data_item2); // add item from source table table_view.filter(filterfunc); // filtering table_view.sort(sortfunc); // sorting // modifying from source_able, hot to signal the table_view? // FYI: Table view is atteched to a GUI item table.erase(data); table.replace(data); #endif return 0; }

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  • D-Link DWA-125 Wireless network card not working after upgrade from 10.04 to 12.04

    - by dava2788
    I upgraded to Ubuntu 12.04 and now the wireless network card D-Link DWA-125 doesn't work. I have the drivers from the official website, But neither recognized during installation. iwconfig: lo no wireless extensions. vmnet8 no wireless extensions. ra0 Ralink STA Link Quality:0 Signal level:0 Noise level:0 Rx invalid nwid:0 invalid crypt:0 invalid misc:0 eth0 no wireless extensions. vmnet1 no wireless extensions. dava@Dava-Ubuntu:~$ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 006: ID 07d1:3c0d D-Link System DWA-125 Wireless N 150 Adapter(rev.A1) [Ralink RT3070] And the chipset: ralink 2870/3070 (rt3070)

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  • Suddenly today, no HDMI on both Ubuntu 12.04 and Windows 7. What is HDA driver?

    - by Mike
    In the past, I just plug in hdmi, then boot laptop, and I have display on tv. Today my tv reads as "No Signal". When I go into "sound" on dashboard, there is No HDMI option. I don't understand what could have changed in the past few days. I also have Windows 7 on this machine, and I have same issue on there as well. In Ubuntu I scanned for drivers, and it asked if I wanted to activate HDA driver for DKMS. I'm not sure what that is. I googled and it looks like an audio driver. In Windows, Its says driver is up to date.

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