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• Multiple problems using BOINC in Ubuntu 12.04

  - by Pablo Viollier

  I installed Berkeley's BOINC software in Windows and I loved it, however I'm having the following problems using it in Ubuntu 12.04: 1) The software doesn't appear in the systray, only in the Unity dock (left side) 2) I can minimize BOINC to the dock but when I open and close other program it maximizes again, wich is very annoying 3) The software can't be closed, it only minimizes to the Unity dock, and nothing happens using right click and close either 4) The software doesn't start at startup or as a startup application 5) It doesn't have a screensaver like in Windows I know it's a lot a problems, but I hope they can be fixed, because I love to use this software, and knowing it's open-software it would be a shame it didn't run on Ubuntu like it should.

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• Flash Webcam non responsive

  - by powerbuoy

  I've got the same problem as this gentleman: https://answers.launchpad.net/ubuntu/+source/flashplugin-nonfree/+question/176541 Where the webcam settings / access does not work at all / is completely unresponsive in Ubuntu 11.10. I've tried webcam access in Facebook, Google+, my own code + a number of tutorials/demos and none work. What happens is the settings dialogue is completely unresponsive. Clicking tabs or buttons does nothing. In the question linked to a suggested answer is to run Unity 2D. Unfortunately this does not work for me (the exact same thing happens). I've also tried Gnome 3 which also does not work. Note that it is only the webcam settings that don't work. YouTube videos and annoying banners work just fine. Does anyone know of a workaround for this (except going back to 11.04) or if they've fixed this in 12.04? - also, are any of you experiencing the same thing?

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• Problems with Silverlight 3 Bitmaps

  As many people move to Silverlight 4, some of us that still have old projects in Silverlight 3, I havent found any solution to the below problem just yet, just a workaround for now. Still when using Visual Studio 2008 and Silverlight I receive this error on BitmapImages, something that looks like got fixed in Visual Studio 2010 and Silverlight 4, I havent tried in VS2010 and Silverlight 3. Silverlight 3: BitmapImage.SetSource - Catastrophic failure Message="Catastrophic failure (Exception...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How do I get an HP 1018 laser printer to work on 12.04?

  - by MInner

  edit : already printed on windows-machine Ubuntu 12.04, LJ 1018. I've tried making foo2zjs from sourse. I've downloaded firmware and placed it where necessarily manually from here I've also tried this - same as manual dowload but with some patches like stoping cups, etc.. I've fixed usbfs: process 11200 (usb) did not claim interface 0 before use problems using sudo rmmod usblp as described here. And now I have Aug 10 11:51:59 pav /usr/sbin/hplj1018: foo2zjs: usb://HP/LaserJet%201018?serial=KP07RLV... download failed. Aug 10 11:51:59 pav /usr/sbin/hplj1018: foo2zjs: loading HP LaserJet 1018 firmware /lib/firmware/hp/sihp1018.dl to CUPS USB device ... error. Before that prinet was stucking on "Sending data to printer". Now it's code is "Not connected". Unless ben@pav:~$ lsusb ... Bus 001 Device 015: ID 03f0:4117 Hewlett-Packard LaserJet 1018 Thank you.

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• How to Connect Lubuntu to Ubuntu Hotspot via Ethernet?

  - by Dillmo

  I just fixed up an old laptop by installing Lubuntu 13.04. The laptop does not have a network card, so it can only connect via Ethernet. I created a hotspot with an Ubuntu laptop, but am having trouble connecting to it via wired. I am not asked for a password when I try to connect, even though the network has a password. The hotspot will not enable a wired connection, so that may be the problem. How can I connect a Lubuntu laptop to an Ubuntu laptop hotspot via Ethernet? Update: The connection also does not ask for a password when connecting to a gaming adapter.

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• Pixel alignment algorithm

  - by user42325

  I have a set of square blocks, I want to draw them in a window. I am sure the coordinates calculation is correct. But on the screen, some squares' edge overlap with other, some are not. I remember the problem is caused by accuracy of pixels. I remember there's a specific topic related to this kind of problem in 2D image rendering. But I don't remember what exactly it is, and how to solve it. Look at this screenshot. Each block should have a fixed width margin. But in the image, the vertical white line have different width.Though, the horizontal lines looks fine.

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• Silverlight Release History : Q1 2010 SP2 (version 2010.1.0603)

  Q1 2010 SP2 Changes: RadGrid What's New: Added ItemTemplate property to GridViewComboBoxColumn. Added: ColumnWidthChanged and ColumnWidthChanging events. Added: GridViewCsvExportOptions type to control exporting in CSV format. ElementExporting and ElementExported events added to GridViewDataControl. Changed the namespace of LookupElement from Telerik.Windows.Controls to Telerik.Windows.Controls.Gridview. What's Fixed: Fixing problem with ShowInsertRow when clicked numerous times resulting...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Do first impressions really count?

  - by Matt

  So, i am currently writing something up for a college class. Problem is everything is hypothetical. I need some proof. I believe a first impression on a website is imperative so that people actually use it and in my case, buy your product or services as well. Basically I'm wondering has there been any studies that shows how a better web design will increase revenue for any kind of services? I don't just mean selling products like a T-shirt, but labor services as well. If someone wanted their computer fixed and searched for companies that can do so, will a first impression on the website help them make their decision to use your company? Are there any studies like this? White papers maybe? Thanks!

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• Smartassembly 5: it lives! Early Access builds now available

  - by Bart Read

  I'm pleased to announce that, late last week, we put out the first early access build for Smartassembly 5, Red Gate's fantastic code protection and error reporting tool, which we acquired last September. You can download it via: http://www.red-gate.com/messageboard/viewforum.php?f=116 It's obviously pretty early days, so please do not try to use this to protect a production application, but we've already done a lot of work in some key areas: We're simplifying and streamlining the licensing model (you won't see this yet, but a lot of the work on this has already been done). We've improved usability of the product, with a better menu, reordering of project settings, and better defaults. We've also fixed a load of bugs, which I'll let Alex blog about in more detail. On a slightly more trivial level, the curly braces are also no more. Over the coming weeks, we'll be adding more improvements, and starting usability tests. If you're interested in getting involved in the latter, please drop an email to [email protected].

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• Windows in StreamInsight: Hopping vs. Snapshot

  - by Roman Schindlauer

  Three weeks ago, we explained the basic concept of windows in StreamInsight: defining sets of events that serve as arguments for set-based operations, like aggregations. Today, we want to discuss the so-called Hopping Windows and compare them with Snapshot Windows. We will compare these two, because they can serve similar purposes with different behaviors; we will discuss the remaining window type, Count Windows, another time. Hopping (and its syntactic-sugar-sister Tumbling) windows are probably the most straightforward windowing concept in StreamInsight. A hopping window is defined by its length, and the offset from one window to the next. They are aligned with some absolute point on the timeline (which can also be given as a parameter to the window) and create sets of events. The diagram below shows an example of a hopping window with length of 1h and hop size (the offset) of 15 minutes, hence creating overlapping windows:   Two aspects in this diagram are important: Since this window is overlapping, an event can fall into more than one windows. If an (interval) event spans a window boundary, its lifetime will be clipped to the window, before it is passed to the set-based operation. That’s the default and currently only available window input policy. (This should only concern you if you are using a time-sensitive user-defined aggregate or operator.) The set-based operation will be applied to each of these sets, yielding a result. This result is: A single scalar value in case of built-in or user-defined aggregates. A subset of the input payloads, in case of the TopK operator. Arbitrary events, when using a user-defined operator. The timestamps of the result are almost always the ones of the windows. Only the user-defined  operator can create new events with timestamps. (However, even these event lifetimes are subject to the window’s output policy, which is currently always to clip to the window end.) Let’s assume we were calculating the sum over some payload field: var result = from window in source.HoppingWindow( TimeSpan.FromHours(1), TimeSpan.FromMinutes(15), HoppingWindowOutputPolicy.ClipToWindowEnd) select new { avg = window.Avg(e => e.Value) }; Now each window is reflected by one result event:   As you can see, the window definition defines the output frequency. No matter how many or few events we got from the input, this hopping window will produce one result every 15 minutes – except for those windows that do not contain any events at all, because StreamInsight window operations are empty-preserving (more about that another time). The “forced” output for every window can become a performance issue if you have a real-time query with many events in a wide group & apply – let me explain: imagine you have a lot of events that you group by and then aggregate within each group – classical streaming pattern. The hopping window produces a result in each group at exactly the same point in time for all groups, since the window boundaries are aligned with the timeline, not with the event timestamps. This means that the query output will become very bursty, delivering the results of all the groups at the same point in time. This becomes especially obvious if the events are long-lasting, spanning multiple windows each, so that the produced result events do not change their value very often. In such a case, a snapshot window can remedy. Snapshot windows are more difficult to explain than hopping windows: they represent those periods in time, when no event changes occur. In other words, if you mark all event start and and times on your timeline, then you are looking at all snapshot window boundaries:   If your events are never overlapping, the snapshot window will not make much sense. It is commonly used together with timestamp modification, which make it a very powerful tool. Or as Allan Mitchell expressed in in a recent tweet: “I used to look at SnapshotWindow() with disdain. Now she is my mistress, the one I turn to in times of trouble and need”. Let’s look at a simple example: I want to compute the average of some value in my events over the last minute. I don’t want this output be produced at fixed intervals, but at soon as it changes (that’s the true event-driven spirit!). The snapshot window will include all currently active event at each point in time, hence we need to extend our original events’ lifetimes into the future: Applying the Snapshot window on these events, it will appear to be “looking back into the past”: If you look at the result produced in this diagram, you can easily prove that, at each point in time, the current event value represents the average of all original input event within the last minute. Here is the LINQ representation of that query, applying the lifetime extension before the snapshot window: var result = from window in source .AlterEventDuration(e => TimeSpan.FromMinutes(1)) .SnapshotWindow(SnapshotWindowOutputPolicy.Clip) select new { avg = window.Avg(e => e.Value) }; With more complex modifications of the event lifetimes you can achieve many more query patterns. For instance “running totals” by keeping the event start times, but snapping their end times to some fixed time, like the end of the day. Each snapshot then “sees” all events that have happened in the respective time period so far. Regards, The StreamInsight Team

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• Some datatypes doesn't honor localization

  - by Peter Larsson

  This bug has haunted me for a while, until today when I decided to not accept it anymore. So I filed a bug over at connect.microsoft.com, https://connect.microsoft.com/SQLServer/feedback/details/636074/some-datatypes-doesnt-honor-localization, and if you feel the way I do, please vote for this bug to be fixed. Here is a very simple repro of the problem DECLARE  @Sample TABLE          (              a DECIMAL(38, 19),              b FLOAT          ) INSERT   @Sample          (              a,              b          ) VALUES   (1E / 7E, 1E / 7E) SELECT   * FROM     @Sample Here is the actual output.                                       a                      b --------------------------------------- ----------------------                   0.1428571428571428400      0,142857142857143   I think that both columns should have the same decimal separator, don't you? //Peter

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• Why is it taking so long to open the Ubuntu Help Center?

  - by Agmenor

  When I click on the Help Center Icon in the 'System' menu, it takes more than a minute to launch the program. More than a minute, for a text only program seeming like a website! All my other programs work fine, and I saw this problem also on other computers. Is there a reason for this? Will it be fixed? I think it is an important issue for beginners. As a response to Scaine, the result of the command software-center is the following: Traceback (most recent call last): File "/usr/share/software-center/update-software-center-agent", line 72, in <module> db = xapian.WritableDatabase(pathname, xapian.DB_CREATE_OR_OVERWRITE) File "/usr/lib/python2.6/dist-packages/xapian.py", line 3195, in __init__ _xapian.WritableDatabase_swiginit(self,_xapian.new_WritableDatabase(*args)) xapian.DatabaseLockError: Unable to acquire database write lock on /home/agmenor/.cache/software-center/software-center-agent.db.tmp: already locked 2011-01-11 19:57:24,495 - softwarecenter.app - INFO - software-center-agent finished with status 1

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• How to upgrade Compiz to 0.9.8 in 12.04?

  - by Naveen

  For a very long time, I'm experiencing this bug in Compiz. It makes my windows flash, when rotating the desktop cube. None of the animations work properly execpt the Wobbly windows. However the temporary fix I found on the bug page helped me to reduce the effects, but it's not 100% perfect. Now they have totally fixed the bug in Compiz 0.9.8 for Quantal. I really need to get the official fix on my Ubuntu 12.04. Don't the LTS versions get bug fixes? Sometimes my desktop cube/cylinder appears like this : None of this happened in Lucid Lynx :( Thanks for having a look.....

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• glColor3f Setting colour

  - by Aaron

  This draws a white vertical line from 640 to 768 at x512: glDisable(GL_TEXTURE_2D); glBegin(GL_LINES); glColor3f((double)R/255,(double)G/255,(double)B/255); glVertex3f(SX, -SPosY, 0); // origin of the line glVertex3f(SX, -EPosY, 0); // ending point of the line glEnd(); glEnable(GL_TEXTURE_2D); This works, but after having a problem where it wouldn't draw it white (Or to any colour passed) I discovered that disabling GL_TEXTURE_2D Before drawing the line, and the re-enabling it afterwards for other things, fixed it. I want to know, is this a normal step a programmer might take? Or is it highly inefficient? I don't want to be causing any slow downs due to a mistake =) Thanks

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• Payments for Android through Checkout/AdSense

  - by David Cesarino

  To those that don't know, Android developers in some countries recently transitioned from AdSense to Checkout for Play Store payments. This is told to existing seller accounts: Q: What happens if I have funds in my AdSense account but am not eligible for a payout yet? A: AdSense accounts have minimum thresholds for payouts. If you’re not eligible for a payout through AdSense for [month of migration], the funds will be automatically transferred back to your Google Checkout account. Once you enter bank account information through your Checkout account and have accrued at least $100 USD, your first wire transfer will be issued during the next monthly payout cycle. However, AdSense is still holding my funds, and since Checkout already paid me directly, following the new directives, I'm afraid the funds will be held in AdSense forever (I used AdSense only for Play Store payments, as required). Obviously, this is no replacement for Google support (a crusade to reach them, but nevermind...), I'm just asking if someone experienced this problem during the transition and how it was fixed.

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• Identifying the best pattern

  - by Daniel Grillo

  I'm developing a software to program a device. I have some commands like Reset, Read_Version, Read_memory, Write_memory, Erase_memory. Reset and Read_Version are fixed. They don't need parameters. Read_memory and Erase_memory need the same parameters that are Length and Address. Write_memory needs Lenght, Address and Data. For each command, I have the same steps in sequence, that are something like this sendCommand, waitForResponse, treatResponse. I'm having difficulty to identify which pattern should I use. Factory, Template Method, Strategy or other pattern.

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• Multiple vulnerabilities in Thunderbird

  - by RitwikGhoshal

  CVE DescriptionCVSSv2 Base ScoreComponentProduct and Resolution CVE-2012-1948 Denial of service (DoS) vulnerability 9.3 Thunderbird Solaris 10 SPARC: 145200-12 X86: 145201-12 CVE-2012-1950 Address spoofing vulnerability 6.4 CVE-2012-1951 Resource Management Errors vulnerability 10.0 CVE-2012-1952 Resource Management Errors vulnerability 9.3 CVE-2012-1953 Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability 9.3 CVE-2012-1954 Resource Management Errors vulnerability 10.0 CVE-2012-1955 Address spoofing vulnerability 6.8 CVE-2012-1957 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability 4.3 CVE-2012-1958 Resource Management Errors vulnerability 9.3 CVE-2012-1959 Permissions, Privileges, and Access Controls vulnerability 5.0 CVE-2012-1961 Improper Input Validation vulnerability 4.3 CVE-2012-1962 Resource Management Errors vulnerability 10.0 CVE-2012-1963 Permissions, Privileges, and Access Controls vulnerability 4.3 CVE-2012-1964 Clickjacking vulnerability 4.0 CVE-2012-1965 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability 4.3 CVE-2012-1966 Permissions, Privileges, and Access Controls vulnerability 4.3 CVE-2012-1967 Arbitrary code execution vulnerability 10.0 CVE-2012-1970 Denial of service (DoS) vulnerability 10.0 CVE-2012-1973 Resource Management Errors vulnerability 10.0 CVE-2012-3966 Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability 10.0 This notification describes vulnerabilities fixed in third-party components that are included in Oracle's product distributions.Information about vulnerabilities affecting Oracle products can be found on Oracle Critical Patch Updates and Security Alerts page.

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• Github Workflow: Pushing small fix branches to remote, or keep them local?

  - by Isaac Hodes

  In Scott Chacon's workflow (explained eg in this SO answer), with essentially two silos (development, and master), if, say I have a small bug to fix (e.g. can be fixed with a few characters) is the optimal way of doing that: a) branch off of development a branch called e.g. fix_123. Push this branch to origin as I work on it. When it's done, code-reviewed, whatever, merge into development and push development to origin. b) Same as above, but without pushing fix_123 to origin.

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• How do I start xterm with a headless system?

  - by NeViXa

  I'm running Ubuntu 12.04 and I want to boot directly and headless in the terminal (no GUI). After that I want to startx to start a program in xterm. When I boot 'headed', everything is working like supposed to, but: - When I boot headless, startx is not working (no screens found) I already tried to change xorg.conf to below, but it didn't not work: Section "Device" Identifier "VNC Device" Driver "vesa" EndSection Section "Screen" Identifier "VNC Screen" Device "VNC Device" Monitor "VNC Monitor" SubSection "Display" Modes "1280x1024" EndSubSection EndSection Section "Monitor" Identifier "VNC Monitor" HorizSync 30-70 VertRefresh 50-75 EndSection How can I boot headless and still be able to run startx? ANSWER: Adding the BusID to the Devices section in the xorg.conf above, fixed the problem for me. BusID "PCI:1:00:1"

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• Radiosity using a hemisphere

  - by P. Avery

  I'm working on a radiosity processor. I'm projecting scene geometry onto a hemisphere at a high order of tessellation during a visibility pass onto a 1024x1024 render target. The problem is that the edges of certain triangles are not being rendered to the item buffer( render target )...so when I test certain edges( or pixels during pixel shader ) for visibility during a reconstruction pass, visible edges are not identified and as a result the pixel for that edge is discarded. One solution was to increase the resolution of the item buffer( up to 4096x4096 )...this helped and more edges were visible, however, this was not fullproof. How do I increase visibility? Here is a screenshot of a scene after radiosity is applied: the seams are edges along a triangle face that were not visible due to the resolution of the item buffer... fixed the problem by sampling the item buffer w/8 points:

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• Static Application Switcher is empty after show dekstop

  - by Jepzen

  Im using the Static Application Switcher to configure my ALT + TAB to cycle trough all applications not grouped. So far so good. Then I press Super + D to "hide all normal windows" (show desktop). This setting is from Keyboard - Shortcuts - Navigation. This also works BUT After hide all normal windows has been activated and I press ALT + TAB nothing comes up. I suspect they have been hidden so well that the Application Switcher does not longer sees them. Anyone know if this can be fixed trough settings somewhere?

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• failed to get i915 symbols, graphics turbo disabled error on boot

  - by Gaurav Butola

  Whenever I boot my laptop, I see this message and it makes the boot process very slow as my screen stays black for a long time before this message appears. It shows just for a split second but today It got worst when my system couldn't boot and stuck on this error, I did several reboots but still couldn't pass this boot error message, then after sometime it fixed itself and now I can use my system as normal. I didn't pay much attention to the error when It was there for just a split second and making my boot process slow, but now that it has stopped me from booting into my system, I would like to know why this error occurring. Error-- ...failed to get i915 symbols, graphics turbo disabled....

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• Efficiently representing a dynamic transform hierarchy

  - by Mattia

  I'm looking for a way to represent a dynamic transform hierarchy (i.e. one where nodes can be inserted and removed arbitrarily) that's a bit more efficient than using a standard tree of pointers . I saw the answers to this question ( Efficient structure for representing a transform hierarchy. ), but as far as I can determine the tree-as-array approach only works for static hierarchies or dynamic ones where nodes have a fixed number of children (both deal-breakers for me). I'm probably wrong about that but could anyone point out how? If I'm not wrong are there other alternatives that work for dynamic hierarchies?

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• Direct Code Support?

  - by Josh Kahane

  A few times in the past I've hit a major wall and simply couldn't progress with a certain aspect of an app as Im a beginner and still learning the ropes (Objective-C specifically). I was curious if anyone knows of any services which support programmers in real time, paid or free and will over video, audio or text chat sit and work a problem out till its fixed and look through your code? I understand Stackoverflow does a super job at this! However Im in need of something a little more tailored where someone can spend a little time to sit and look and what Im dealing with and delve into my a code if need be. Thanks.

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• How to upgrade Compiz to 0.9.8 or downgrade to 0.8.6 in 12.04?

  - by Naveen

  For a very long time, I'm experiencing this bug in Compiz. It makes my windows flash, when rotating the desktop cube. None of the animations work properly execpt the Wobbly windows. However the temporary fix I found on the bug page helped me to reduce the effects, but it's not 100% perfect. Now they have totally fixed the bug in Compiz 0.9.8 for Quantal. I really need to get the official fix on my Ubuntu 12.04. Don't the LTS versions get bug fixes? Sometimes my desktop cube/cylinder appears like this : None of this happened in Lucid Lynx :( Thanks for having a look.....

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