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Articles indexed Wednesday June 20 2012

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• How to deal with bad developers who hold back the project

  - by ILovePaperTowels

  We're at the end of a project, but we continue to run into issues because of a single piece of the project. This piece is handled by a specific developer. Finally, we grabbed latest and started reviewing it. It's just horrendous code! Trying to step through it was difficult and it's a relatively simple workflow. The point of this question is, how to deal with this situation. The developer has a hard time accepting criticism (constructive or otherwise) and feels he is more knowledgeable than others on the team who are, well, highly decorated, experienced and accomplished developers. It's difficult to even get into a topic about development because it turns into "I know what I'm talking about and you're just wrong!" type of conversation. A request has already been put in to replace this developer but it is a hard sell since devs are in short supply where we are and this is a corporation with a LOT of political bs. Management has been notified a few times but nothing is happening.

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• What's the term for re-implementing an old API in terms of a newer API

  - by dodgy_coder

  The reason for doing it is to solve the case when a newer API is no longer backwards compatible with an older API. To explain, just say that there is an old API v1.0. The maker of this API decides it is broken and works on a new API v1.1 that intentionally breaks compatibility with the old API v1.0. Now, any programs written against the old API cannot be recompiled as-is with the new API. Then lets say there is a large app written against the old API and the developer doesn't have access to the source code. A solution would be to re-implement a "custom" old API v1.0 in terms of the new API v1.1 calls. So the "custom" v1.0 API is actually keeping the same interface/methods as the v1.0 API but inside its implementation it is actually making calls to the new API v1.1 methods. So the large app can be then compiled and linked against the "custom" v1.0 API and the new v1.1 API without any major source code changes. Is there a term for this practice? There's a recent example of this happening in Jamie Zawinski's port of XScreenSaver to the iPhone - he re-implemented the OpenGL 1.3 API in terms of the OpenGL ES 1.1 API. In this case, OpenGL 1.3 represents the "old" API and OpenGL ES 1.1 represents the "new" API.

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• Can a 20 years old programmer who has been programming daily since 10 get a job that will pay for what he knows?

  - by Dokkat

  I'm a programmer who has been programming daily since I was 10-years-old. Is it possible to get a job with a salary that reflects my programming knowledge, or do I have to be in the same place as someone starting just now, as I've never had an actual job? I am not sure if this kind of question is allowed here and could not find out. If it is not, could you kindly suggest a place to ask this? Sorry for any inconveniences.

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• Question about modeling with MVC (the pattern, not the MS stuff / non web)

  - by paul

  I'm working on an application in which I'm looking to employ the MVC pattern, but I've come up against a design decision point I could use some help with. My application is going to deal with the design of state-machines. Currently the MVC model holds information about the machine's states, inputs, outputs, etc. The view is going to show a diagram for the machine, graphically allowing the user to add new states, establish transitions, and put the states in a pleasing arrangement, among other things. I would like to store part of the diagram's state (e.g. the x and y state positions) when the machine information is stored for later retrieval, and am wondering how best to go about structuring the model(s?) for this. It seems like this UI information is more closely related to the view than to the state-machine model, so I was thinking that a secondary model might be in order, but I am reluctant to pursue this route because of the added complexity. Adding this information to the current model doesn't seem the right way to go about it either. This is the my first time using the MVC pattern so I'm still figuring things out. Any input would be appreciated.

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• Which is more important in a web application code promotion hierarchy? production environment to repo equivalence or unidirectional propagation?

  - by ghbarratt

  Lets say you have a code promotion hierarchy consisting of several environments, (the polar end) two of which are development (dev) and production (prod). Lets say you also have a web application where important (but not developer controlled) files are created (and perhaps altered) in the production environment. Lets say that you (or someone above you) decided that the files which are controlled/created/altered/deleted in the production environment needed to go into the repository. Which of the following two sets of practice / approaches do you find best: Committing these non-developed file modifications made in the production environment so that the repository reflects the production environment as closely and as often as possible. Generally ignoring the non-developed production environment alterations, placing confidence in backups to restore the production environment should it be harmed, and keeping a resolution to avoid pushing developments through the promotion hierarchy in the reverse direction (avoiding pushing from prod to dev), only committing the files found in the production environment if they were absolutely necessary in other environments for development. So, 1 or 2, and why? PS - I am currently slightly biased toward maintaining production environment to repository equivalence (option 1), but I keep an open mind and would accept an answer supporting either.

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• Which field of programming is known as the best practice for Java? [closed]

  - by user1276509

  I'm a CS student and I have some programming background such as PHP, JavaScript and Pascal. Since Java is so popular among local companies and Java is known as market skill, I'm going to learn it. But I don't know in which field I can use it. So I wonder, what can I do with Java? I heard that Java is not good for web development, although there is Play! Framework. I know a lot of people who prefer to use Python, Ruby and PHP for web development instead of Java and its Play. I also heard that Java is not good to write destkop applications, although it's cross-platform. Many programmers prefer C# for destkop. So I see there's only one field which I can use Java for it - is Android development. But I'm not interested in mobile application development. So my question is which field of programming is known as the best practice for Java? Thanks in advance.

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• Is there a difference between "self-plagiarizing" in programming vs doing so as a writer?

  - by makerofthings7

  I read this Gawker article about how a writer reused some of his older material for new assignments for different magazines. Is there any similar ethical (societal?) dilemma when doing the same thing in the realm of Programming? Does reusing a shared library you've accumulated over the years amount to self-plagarizm? What I'm getting at is that it seems that the creative world of software development isn't as stringent regarding self-plagarism as say journalism or blogging. In fact on one of my interviews at GS I was asked what kind of libraries I've developed over the years, implying that me getting the job would entail co-licensing helpful portions of code to that company. Are there any cases where although it's legal to self-plagarize, it would be frowned upon in the software world?

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• arrays format (Javascript)

  - by João Melo

  i have a list of users, with minions, something like this: User52: minion10 minion12 User32: minion13 minion11 i've been keeping in an array where the "location" is the id, like this: Users: [52]User minions: [10]minion [12]minion [32]User minions: [13]minion [11]minion so i can access them easily like this: user[UserID].minions[MinionID] (ex: user[32].minions[11]) but when i print it or send it by json i get something like this: {,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,minion,,,,,,,,,,,,,,minion} but should i keep using like this or should i change to something like this: User = function(){ this.minions = ...; this.getMinion = function(value){ for(var m in this.minions){ if(this.minions[m].id == value){ return this.minions[m]; break; } } } } and get it like this: user.getMinion(MinionID); Question: i get better performance using a "short" array but using loops every time i need a minion, or using "long" arrays, but no need for loop and getting values directly from the id "name"?

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• Communication between state machines with hidden transitions

  - by slartibartfast

  The question emerged for me in embedded programming but I think it can be applied to quite a number of general networking situations e.g. when a communication partner fails. Assume we have an application logic (a program) running on a computer and a gadget connected to that computer via e.g. a serial interface like RS232. The gadget has a red/green/blue LED and a button which disables the LED. The LEDs color can be driven by software commands over the serial interface and the state (red/green/blue/off) is read back and causes a reaction in the application logic. Asynchronous behaviour of the application logic with regard to the LED color down to a certain delay (depending on the execution cycle of the application) is tolerated. What we essentially have is a resource (the LED) which can not be reserved and handled atomically by software because the (organic) user can at any time press the button to interfere/break the software attempt to switch the LED color. Stripping this example from its physical outfit I dare to say that we have two communicating state machines A (application logic) and G (gadget) where G executes state changes unbeknownst to A (and also the other way round, but this is not significant in our example) and only A can be modified at a reasonable price. A needs to see the reaction and state of G in one piece of information which may be (slightly) outdated but not inconsistent with respect to the short time window when this information was generated on the side of G. What I am looking for is a concise method to handle such a situation in embedded software (i.e. no layer/framework like CORBA etc. available). A programming technique which is able to map the complete behaviour of both participants on classical interfaces of a classical programming language (C in this case). To complicate matters (or rather, to generalize), a simple high frequency communication cycle of A to G and back (IOW: A is rapidly polling G) is out of focus because of technical restrictions (delay of serial com, A not always active, etc.). What I currently see as a general solution is: the application logic A as one thread of execution an adapter object (proxy) PG (presenting G inside the computer), together with the serial driver as another thread a communication object between the two (A and PG) which is transactionally safe to exchange The two execution contexts (threads) on the computer may be multi-core or just interrupt driven or tasks in an RTOS. The com object contains the following data: suspected state (written by A): effectively a member of the power set of states in G (in our case: red, green, blue, off, red_or_green, red_or_blue, red_or_off...etc.) command data (written by A): test_if_off, switch_to_red, switch_to_green, switch_to_blue operation status (written by PG): operation_pending, success, wrong_state, link_broken new state (written by PG): red, green, blue, off The idea of the com object is that A writes whichever (set of) state it thinks G is in, together with a command. (Example: suspected state="red_or_green", command: "switch_to_blue") Notice that the commands issued by A will not work if the user has switched off the LED and A needs to know this. PG will pick up such a com object and try to send the command to G, receive its answer (or a timeout) and set the operation status and new state accordingly. A will take back the oject once it is no longer at operation_pending and can react to the outcome. The com object could be separated of course (into two objects, one for each direction) but I think it is convenient in nearly all instances to have the command close to the result. I would like to have major flaws pointed out or hear an entirely different view on such a situation.

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• Dealing with under performing co-worker

  - by PSU_Kardi

  I'm going to try to keep this topic as generic as I can so the question isn't closed as too specific or whatever. Anyway, let's get to it. I currently work on a somewhat small project with 15-20 developers. We recently hired a few new people because we had the hours and it synched up well with the schedule. It was refreshing to see hiring done this way and not just throwing hours & employees at a problem. Alas, I could argue the hiring process still isn't perfect but that's another story for another day. Anyway, one of these developers is really under performing. The developer is green and has a lot of bad habits. Comes in later than I do and leaving earlier than I am. This in and of itself isn't an issue, but the lack of quality work makes it become a bit frustrating. When giving out tasking the question is no longer, what can realistically be given but now becomes - How much of the work will we have to redo? So as the project goes on, I'm afraid this might cause issues with the schedule. The schedule could have been defined as a bit aggressive; however, given that this person is under performing it now in my mind goes from aggressive to potentially chaotic. Yes, one person shouldn't make or break a schedule and that in and of itself is an issue too but please let's ignore that for right now. What's the best way to deal with this? I'm not the boss, I'm not the project lead but I've been around for a while now and am not sure how to proceed. Complaining to management comes across as childish and doing nothing seems wrong. I'll ask the community for insight/advice/suggestions.

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• Does Firefox Phishing Protection / Safebrowsing have any privacy implications?

  - by Nowo

  The current google results are outdated. What is the current status? I was on www.mozilla.org/en-US/legal/privacy/firefox.html and saw "Protection Against Suspected Forgery and Attack Sites Features". Can you translate please more to human speak? First they download a list and compare local... Ok... Here it gets messy "If there is a match, Firefox will check with its third party provider to ensure that the website is still on the blacklist. The information sent between Firefox and its third party provider(s) are hashed URLs. In fact, multiple hashed URLs are sent with the real hash so that the third party provider(s) will not know what site you are visiting." - If that hash were send to mozilla, they would knew which site were accessed? "In order to safeguard your privacy, Firefox will not transmit the complete URL of web pages that you visit to anyone other than Mozilla and its service providers." - In other words, Mozilla and its service providers get all complete URLs (of sites, which were in blacklist)? "While it is possible that a third party service provider may determine the actual URL from the hashed URL sent, Mozilla’s policy is to require [...]" - Privacy is depends on policy rather than technology?

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• Calibre icon missing from system tray

  - by onvas

  After installing Calibre, I immediately changed the preferences particularly by enabling system tray icon. The program restarted, as required, but the icon didn't appear on my sys tray. So I tried restarting my laptop, but still the same negative result. I have already whitelisted all apps after installing my OS so the problem is likely not that. Is there another solution for this? I'm using 12.04 64-bit on my ThinkPad R61i.

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• How do I access the preferences from my main dialog window? Also how do I add a new preference?

  - by Captain_Glen

  class PreferencesCalorieBurnerDialog(PreferencesDialog): __gtype_name__ = "PreferencesCalorieBurnerDialog" def finish_initializing(self, builder): # pylint: disable=E1002 """Set up the preferences dialog""" super(PreferencesCalorieBurnerDialog, self).finish_initializing(builder) # Bind each preference widget to gsettings settings = Gio.Settings("net.launchpad.calorie-burner") widget = self.builder.get_object('example_entry') settings.bind("example", widget, "text", Gio.SettingsBindFlags.DEFAULT) #Custom preference widget = self.builder.get_object('weight') settings.bind("weight", widget, "float", Gio.SettingsBindFlags.DEFAULT) Main Dialog self.PreferencesDialog.get_weight()???

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• Domain resolution - local first then external

  - by stefgosselin

  I would like to know how I can configure my dns settings so that domain is resolved locally first, then if not resolved it goes to external DNS. I had this working before, I am using Ubuntu through a VM and need the local domain to resolve first but since I have upgraded I had to reconfigure network and now it works only external, local host file does not seem to even be used. Is there an easy way to check this out? I did slap it up in google but no specific answer seemed to match my case and I too tight on delivery deadline to test-and-try different approaches. You guys rock, thanks.

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• Cannot get script to run at startup (tried all the simple answers)

  - by Carey Head

  I have Ubuntu Desktop 12.04 LTS running great on an older Acer desktop. I want to use this machine as an in-home server for hosting Minecraft. The command to start the Minecraft server is java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui and that works great when I cd into the correct directory and execute the above. I created a script to do this: #!/bin/bash cd /home/myuser/minecraft-server1 java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui & cd /home/myuser/minecraft-server2 java -Xmx1024M -Xms1024M -jar minecraft_server.jar nogui & exit 0 I made this .sh file executable, and it too runs great when I start it manually from the terminal. The problem I'm having is getting these to execute at startup. I have my user account on this machine to auto login. I have tried the following: Adding the following to "Startup Applications" : sh /home/myuser/myscript.sh (Nothing happens on reboot) Adding the same to /etc/rc.local (Nothing happens on reboot). I even tested this one by running /etc/rc.local from the terminal, and it executed great. Just not at boot/auto login Added the lines from the script directly to rc.local (Nothing happens on reboot). I can't help but think that there's something I'm missing. The script executes great when run manually, but will not run at boot/auto login. Many thanks in advance.

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• How to get past black screen with mouse icon while installing on Gateway MX6920?

  - by tom kruse

  I have an old Gateway MX6920 laptop that got a virus on its hard drive so I put in a new one from another laptop. When i turn it on it tries to load Windows but fails so I'm going to try to put Ubuntu on it (because I heard it's a good OS). I downloaded the 32-bit desktop version of Ubuntu and burned it to a CD. I put the CD in the computer, went to the boot menu, and selected CD-ROM. The computer tries to boot but stops at a black screen with a mouse icon sitting in the middle of the display. I have no idea what's going on, so please help.

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• Xfce session will not login from login prompt. Why?

  - by hydroparadise

  Well, not sure how I did it, but for some reason I am unable to get past the login screen on Xfce. What's odd is that I had set the machine up (from install) to login automatically. Then when I finish rebooting after installing sudo apt-get install openssh-server and sudo apt-get install vnc4server all the sudden I am getting prompted for my password. I proceed to type my password (successfully might I add) to login, the screen goes black for a second, then brings me right back to the same password prompt. I am able ssh in(now), but I get no love from workstation login. Maybe vnc4server is the culprit? What did I do? And can I fix it? EDIT: The guest account, however will let me login no problem. What gives? I have a sneaking feeling that this could be permission issue.

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• Cursor seems to freeze in the first attempt to type - Unity 3D, 12.04

  - by Denis

  It happens in the first attempt of typing, no matter is after the startup, or 5 minutes later, or then after. The cursor (or maybe it's the system) seems to freeze, no matter the application I use, taking up 4 to 5 sec to appear what is typed. Subsequently, everything is normal, using another applications. @Anwar Shah suggested it could be a daemon waiting to run before the lauching of the first application. Turning off Zeitgest didn't help. It occurs only with Unity-3d. Tested with Unity-2d, everything is fine. Tried to change some Compiz settings, nothing worked, although not tested with every single parameter. Also I deactivated Ati proprietary driver, no effect. My system: AMD E350 1.6Gh, 2G-Ram, ATI graphics - Ubuntu 12.04, 64bits. Is that what I should expect, or can be fixed or improved? Thanks.

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• I'd like to switch from 32-bit to 64-bit within same version

  - by Marty Fried

  I have a 32-bit installation of 11.10 on my 64-bit (4 GB) home AMD system. I have recently read up a bit on 64-bit version, and it seems that it would be a marginally better choice now for me. I have read about several methods to help reinstall all the various apps, using either dpkg's get-selections/set-selections and dselect in various ways, or using synaptic's save/get markings. The problem here is that I've read several variations, and I'm not sure which is best. I have enough disk space to do this with a brand new partition, so I'm not too worried about destroying anything, but I don't really want to make it my life's work, hence my appeal for expert tips. Since it's the same version, would it be safe to copy configuration files from the 32-bit system? I'd guess my home directory and /etc might be enough, and would save at least most of the time to reconfigure. But are there difference in configuration files in either of these directories for 32 vs 64 bits that might cause problems? After reinstalling to 64-bit, I can then continue along the 64 bit path for upgrades, but I thought it would be easier to switch the same version, than to try to reinstall apps and upgrade at the same time. Some methods I've seen suggested, among others: A. From Ubuntu forums On your old system (assuming it is still working), start up Synaptic and go: File->Save Markings and choose a file name along with a location (like a USB drive) that you can use when you have installed your new system). You need to check on the bottom: "Save full state, not only changes" This file contains a list of all your currently installed packages, and when you have installed and booted up your new system (and configured your repositories to the best for your location - as we all do, don't we?) then start up Synaptic and go: File-Read Markings and point it at your saved file, and after that has completed then select Apply to kick off the download & installation of all of those packages you had installed previously! B. From the same discussion: According to section 6.4.9 of the Debian Reference Manual, the following will save both the list of packages installed and their debconf configuration: # dpkg --get-selections "*" >myselections # or use \* # debconf-get-selections > debconfsel.txt and the following will reinstall and reconfigure them: # dselect update # debconf-set-selections < debconfsel.txt # dpkg --set-selections <myselections # apt-get -u dselect-upgrade # or dselect install C. A variation on the above I've seen a lot, this from stackoverflow: dpkg --get-selections > package_list then on the new install: cat package_list | sudo dpkg --set-selections && sudo apt-get dselect-upgrade I don't really understand B, or why it's slightly different than many others.

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• How do you make Bastille work and secure Ubuntu 12.04? It doesnt work for me `sudo bastille -x`

  - by BobMil

  I was able to install bastille from the normal repositories and then run the GUI. After going through the options and clicking OK to apply, it showed these errors. Do you know why Bastille wont work on Ubuntu 12.04? NOTE: Executing PSAD Specific Configuration NOTE: Executing File Permissions Specific Configuration NOTE: Executing Account Security Specific Configuration NOTE: Executing Boot Security Specific Configuration ERROR: Unable to open /etc/inittab as the swap file /etc/inittab.bastille already exists. Rename the swap file to allow Bastille to make desired file modifications. ERROR: open /etc/inittab.bastille failed... ERROR: open /etc/inittab failed. ERROR: Couldn't insert line to /etc/inittab, since open failed.NOTE: Executing Inetd Specific Configuration

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• frequency out of range - please change display mode

  - by Dave

  I just downloaded the latest version of the Ubuntu live CD, and have installed it on a desktop computer (a Fujitsu Scaleo P). Once installed it seems to work perfectly, although there are some updates recommended in the Update Manager. My problem is that, after having installed these updates and restarted the computer, I get this message on my monitor, and no Ubuntu interface is visible: frequency out of range - please change display mode I do not know how to change this when I can't access an interface. Is there a command that will bypass trying to boot the GUI and let me change the display mode via a CLI? I am brand new to Ubuntu and any help on this would be much appreciated.

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• 12.04 WiFi issue on a particular access point

  - by user71706

  I have a WiFi access point that I connect to a PC to share its Internet connection with multiple machines, in a training environment. All the machines with 11.04 connect to this access point with no problem, and can access any server on the Internet. These machines have an Intel Wireless -N 1030 BGN chipset (as reported by lspci). Now, my problem is that I don't manage to connect 12.04 machines to this wireless network. The systems I tried do manage to connect (confirmed by Network Manager), but when I try to access a website like http://kernel.org, the browser shows "Connecting to kernel.org...", but displays a "The connection has timed out" error page. Other symptoms: Name resolution works (for example 'nslookup kernel.org') finds kernel.org's IP address 'ping kernel.org' doesn't work The same 12.04 machines have no problem at all with other wireless networks. So there is probably something weird in my access point (though the 11.04 machines are not impacted). Would you have any suggestions for investigating this issue? Thanks, Michael.

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• Integrated webcam in lenovo t410 not working with 12.04

  - by kristianp

  I have a Lenovo T410 with an inbuilt webcam and I haven't been able to get the webcam working. I tried skype, cheese, both just give me a black window. The microphone works fine with skype, by the way. Can anyone provide any clues please? The webcam is enabled in the bios, but there is no light indicating the webcam is on (not sure if there should be, though). I tried this on Kubuntu 11.10 and have upgraded to 12.04 with the same results. The Fn-F6 keyboard combination doens't seem to do anything either. EDIT: I got the webcam replaced, it looks like it was a hardware problem, because it works fine now. Thanks guys. $ ls /dev/v4l/* /dev/v4l/by-id: usb-Chicony_Electronics_Co.__Ltd._Integrated_Camera-video-index0 /dev/v4l/by-path: pci-0000:00:1a.0-usb-0:1.6:1.0-video-index0 And lsusb: $ 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 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub Bus 001 Device 003: ID 147e:2016 Upek Biometric Touchchip/Touchstrip Fingerprint Sensor Bus 001 Device 004: ID 0a5c:217f Broadcom Corp. Bluetooth Controller Bus 001 Device 005: ID 17ef:480f Lenovo Integrated Webcam [R5U877] Bus 002 Device 003: ID 05c6:9204 Qualcomm, Inc. Bus 002 Device 004: ID 17ef:1003 Lenovo Integrated Smart Card Reader Here is the output from guvcview, minus lots of lines describing the available capture formats. It says "unable to start with minimum setup. Please reconnect your camera.". guvcview 1.5.3 ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5) ALSA lib pcm_dmix.c:957:(snd_pcm_dmix_open) The dmix plugin supports only playback stream ALSA lib pcm_dmix.c:1018:(snd_pcm_dmix_open) unable to open slave Cannot connect to server socket err = No such file or directory Cannot connect to server socket jack server is not running or cannot be started video device: /dev/video0 Init. Integrated Camera (location: usb-0000:00:1a.0-1.6) { pixelformat = 'YUYV', description = 'YUV 4:2:2 (YUYV)' } { discrete: width = 640, height = 480 } Time interval between frame: 1/30, .... { discrete: width = 1600, height = 1200 } Time interval between frame: 1/15, vid:17ef pid:480f driver:uvcvideo checking format: 1196444237 libv4l2: error setting pixformat: Device or resource busy VIDIOC_S_FORMAT - Unable to set format: Device or resource busy Init v4L2 failed !! Init video returned -2 trying minimum setup ... video device: /dev/video0 Init. Integrated Camera (location: usb-0000:00:1a.0-1.6) { pixelformat = 'YUYV', description = 'YUV 4:2:2 (YUYV)' } { discrete: width = 640, height = 480 } .... vid:17ef pid:480f driver:uvcvideo checking format: 1448695129 libv4l2: error setting pixformat: Device or resource busy VIDIOC_S_FORMAT - Unable to set format: Device or resource busy Init v4L2 failed !! ERROR: Minimum Setup Failed. Exiting... VIDIOC_REQBUFS - Failed to delete buffers: Invalid argument (errno 22) cleaned allocations - 100% Closing portaudio ...OK Terminated.

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• xubuntu app menu on wrong side of screen

  - by D0X

  I am using Xubuntu 12.04, with a dual monitor setup (with the nvidia driver xinerama enabled). The top panel is spanned acros the two monitors. This works quite fine, except for one thing. When I click the little Application Menu button on my left screen, the application menu opens on the top right corner of the left screen. This is quite annoying, I fiddled in the panel prefs but could not fix this. Any thoughts?

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• Minecraft becomes blank after loading

  - by James Kosmopoulos

  I have Minecraft installed but whenever I open it, it shows the login screen, so I login, and then when I click login, the window turns black. When I tried to play in in browser, the same thing happened except the window turned whit. Please help guys! I feel like I've tried EVERYTHING! Thanks! =) Oh and if you want a better look at the problem, I've created this video that is a recording of my desktop and shows what happens when I try to run Minecraft. http://www.youtube.com/watch?v=8CMsnwoUbEI

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