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  • Print jobs to Epson Stylus Photo 640 all stopped after upgrade 10.04 to 12.04

    - by Tessa Sayers
    Upgraded from Ubuntu 10.04 to 12.04 on 19th oct 2012. Now all print jobs end up in the print queue with the label "Stopped". Reinstalled the printer driver - it is gutenberg 5.2.8 pre1. Looking at "http://localhost:631/jobs" shows an error message by each stopped job as follows:"The PPD version (5.2.5 Simplified) is not compatible with Gutenprint 5.2.8-pre1." Found a long bug-fixing history in bugs.launchpad.net which seem to imply that this problem has been fixed. It seems to be a problem with the installation not updating the ppd files. Is there any workaround to fix this problem?

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  • "Zoom" text to be as big as possible within constraints/box

    - by stolsvik
    First problem: You have 400 pixels width to go on, and need to fit some text within that constraint as large as possible (thus, the text shall use that amount of space). Throw in a new constraint: If the text is just "A", then it shall not zoom this above 100 pixels (or some specific font size). Then, a final situation: Linebreaks. Fit some text in the largest possible way within e.g. 400 x 150 pixels. An obvious way is to simply start with point 1, and then increase until you can't fit it anymore. This would work for all three problems, but would be very crude. The fitting of a single line within bounds could be done by writing it with some fixed point size, check the resulting pixel bounds of the text, and then simply scale it with a transform (the text scales properly too then, check out TransformUI). Any ideas of other ways to attack this would be greatly appreciated!

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  • Rotate object Up/Down/Left/Right in any orientation

    - by George Duckett
    I'm rendering model at the origin with a fixed camera looking at it positioned on the z axis. I want to be able to rotate the model up/down and left/right. Currently I have 2 variables, HorizontalRotation and VerticalRotation. When calculating the world matrix I rotate about the Y axis by HorizontalRotation and about the X axis by VerticalRotation. The ..Rotation variables are controlled by pressing up/down/left/right arrow keys. The problem I'm having is that the rotations are happening relative to the object. Lets say it's a model of the world. Pressing Up a bit would let me look at the north pole. Currently when i press right the earth spins infront of the camera on its axis; I'm still looking at the north pole. How can i get it so that no matter what rotations are currently applied i can always rotate my model relative to the camera/world axis?

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  • Good Silverlight 4.0 chart / graph component?

    - by Duncan Bayne
    I've been using the Silverlight Toolkit but I'm finding the quality lacking; in particular this memory leak / phantom point bug renders the Chart component completely unusable. Can anyone recommend a good chart / graph component for Silverlight 4.0? I'm looking for one that provides: multiple simultaneous series, both scatter and line multi-select of points configurable tool-tips automatic axis scaling real-time update of data That last point sounds trivial but is tripping up the Silverlight Toolkit Chart; if you rapidly change the axis range, it sometimes leaves phantom points behind in addition to the points it should be displaying.

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  • Tales from the Coal Face - Reporting errors

    - by TATWORTH
    One of the questions that comes up frequently, is "Is it worthwhile to report errors?".Last weekend, after installing the latest StyleCop I loaded up my copy of Power Collections. I found that StyleCop was now correctly picking up a lot of missing "this." statements, however there were now a number of false positives. Anticipating the need to submit sample code, I cleaned the solution and zipped it up.I reported this at http://stylecop.codeplex.com/discussions/357319.  The stylecop administrator promoted this report to a work item (see http://stylecop.codeplex.com/workitem/7285) and I uploaded the previously prepared Zip file. The StyleCop team was able to locate the problem and it is "Fixed in upcoming 4.7.27".The conclusion:Report errors!  Prepare sample code illustrating the error.

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  • Drop duplicated axis label in Flex Chart

    - by Sean Chen
    Hi, All. I use LineChart in Flex with horizontal category axis and I need drop duplicated category label on the chart. The data I use are like that: {Product: "C1", Store: "S1", Profit: "1500}, {Product: "C2", Store: "S1", Profit: "1000}, {Product: "C3", Store: "S2", Profit: "800}, {Product: "C4", Store: "S2", Profit: "1200}, {Product: "C5", Store: "S3", Profit: "1800} Beacuse I set horizontalAxis.categoryField = "Store" , the chart show label "S1,S1,S2,S2,S3" on ths axes. However, both C1 and C2 data point group on the second "S1" category (as same as C3,C4 on second S2). If I accept group data point on the same x-poistion, is there any idea to drop duplicated label?

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  • Changing memory address of a char*

    - by Randall Flagg
    I have the following code: str = "ABCD"; //0x001135F8 newStr = "EFGH"; //0x008F5740 *str after realloc at 5th position - //0x001135FC I want it to point to: 0x008F5740 void str_cat(char** str, char* newStr) { int i; realloc(*str, strlen(*str) + strlen(newStr) + 1); //*str is now 9 length long // I want to change the memory reference value of the 5th char in *str to point to newStr. // Is this possible? // &((*str) + strlen(*str)) = (char*)&newStr; //This is my problem (I think) }

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  • Feed Reader Fix

    - by Geertjan
    In the FeedReader sample (available in the New Projects window), there's this piece of code: private static Feed getFeed(Node node) { InstanceCookie ck = node.getLookup().lookup(InstanceCookie.class); if (ck == null) { throw new IllegalStateException("Bogus file in feeds folder: " + node.getLookup().lookup(FileObject.class)); } try { return (Feed) ck.instanceCreate(); } catch (ClassNotFoundException ex) { Exceptions.printStackTrace(ex); } catch (IOException ex) { Exceptions.printStackTrace(ex); } return null; } Since 7.1, for some reason, the above doesn't work. What does work, and is simpler, is this, instead of the above: private static Feed getFeed(Node node) { Feed f = FileUtil.getConfigObject("RssFeeds/sample.instance", Feed.class); if (f == null) { throw new IllegalStateException("Bogus file in feeds folder: " + node.getLookup().lookup(FileObject.class)); } return f; } So, the code needs to be fixed in the sample.

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  • Built in raytracing?

    - by acidzombie24
    Relating to this question i was wondering if .NET has any libs (or a function) i can use to detect if one point collides with another. I am not sure what angles i should use but is there some function like this func(point src, rect target, angle, distanceOfVision, listPointOrRectOfWalls) Pretty unlikely but i dont know a formula or how to start. Its a quick and dirty prototype. I am thinking of writing the func about but dropping angle and just make line of sight a rectangle and check if any points is between src and target.

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  • What is the reason for high power consumption in 12.04?

    - by tom
    I haven't seen this exact question posted or any related answers, so I'm re-posting. Here is the problem: After upgrading to Ubuntu 12.04 Precise Pangolin, my t420s laptop idles above 20 watts (right now with only Chrome running, I'm using 25.4 W) I had a similar problem with Ubuntu 11.10, but after much tweaking the power consumption came down < 10 W on idle. The primary culprit to the 11.10 problem was supposedly fixed by default in 12.04. So my question is, what is happening now? Computer: Lenovo Thinkpad t420s, with Intel i5-2520M @2.5 Ghz - 2x 4gb ram - disk 0 HITACHI 320 Gb - disk 1 SATA SSD 128 Gb

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  • Graphics corrupt after upgrade from 11.10 to 12.04

    - by RiaanZA
    I'm stuck at the moment with an ubuntu that boots into an unusable white screen after upgrading from 11.10 to 12.04. I've tried booting into safe X mode but it just throws me back to the safe menu every time. Restore previous graphics driver, use default graphics configuration and set up new graphics configuration all don't work either. I've tried various methods of resetting the graphics from the command line, but none are working due to unmet dependencies. These cannot be fixed by doing the normal "apt-get -f install" because its saying there is a dpkg error in var/lib/dpkg/status (blank line relating to skype-wrapper). I haven't been able to find any other way to fix the dependencies yet. Can someone please give me some advice on what to do, I really don't want to go the re install route.

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  • Unity session goes to lock on app launch, and won't unlock with password

    - by really
    Has been happening on every Ubuntu machine I've used to date, which is a total of 4. Started in 12.10 as far as I know, but it might have happened with 12.04, 12.10, 13.04, 13.10 and now 14.04. It doesn't seem to matter what I'm doing, but what always seems to trigger it is opening a web browser or some other application first from the sidebar. Firefox was was the most recent trigger. Instead of opening my browser, which it acts like it's going to do... the session locks, goes to the login screen, and won't unlock with the correct password. By 'won't unlock' I mean it unlocks then immediately locks again without first restoring unity, it does not produce 'incorrect password' I suspect this is a virus or password snooping software because of the fact it won't unlock with correct password information and I think if this IS a security issue, it should be fixed asap considering it's widespread throughout multiple versions. It's probably not a virus, but it is certainly suspicious behaviour to see your pc do that... wouldn't you think?

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  • How can one describe a rock-paper-scissors relationship between 3 items?

    - by Madara Uchiha
    Let's say I have the following structure: abstract class Hand {} class Rock extends Hand {} class Paper extends Hand {} class Scissors extends Hand {} The goal is to make a function (or a method) Hand::compareHands(Hand $hand1, Hand $hand2), which would return the winning hand in a rock-paper-scissors match. That would be very easy with a bunch of ifs, but the point is to have a more robust structure, that's relying on polymorphism rather than on procedural code. P.S. this is done in actual production code, if someone is asking. This isn't some sort of challenge or homework. (It's not really rock-paper-scissors, but you get the point).

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  • Socialengine installation error

    - by akopacsi
    I'm trying to install Socialengine (clean install, empty database, legal license key), but I ran into this error message at Step 3 of the installation: Step 3: Setup MySQL Database Mysqli statement execute error : Prepared statement needs to be re-prepared I found a troubleshooting artice about "Bug in MySQLi Extension Causes Apache 500 Error" at http://www.socialengine.net/blog/article?id=161&article=Bug-in-MySQLi-Extension-Causes-Apache-500-Error I uploaded the fixed file and try to install again, but it still doesn't work. It terminates at Step 3 again with the same error message. I would be very grateful if you could help me. Thanks.

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  • How to manage enemy movement and shoot in a shmup?

    - by whatever
    I'm wondering what is the best (or at least a good) way of managing enemies in a shoot-em-up. Basically, what I'd do would be a class that manages displaying and updating positions of all the enemies. But how to create good deplacements for enemies? A list of where-to-go points? gravitating around some fixed points (with ponderation, distance evaluation etc.)? Same question for the shoot patterns? Can you please put me on a track?

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  • How to Generate Embeddable Widgets, and Return PartialView, JS & CSS as JSONP?

    - by DaveDev
    I found this question which is a great starting point towards creating embedded widgets that enable showing dynamic content on remote sites (i.e. a different domain). One problem I'm having is with the following code: public ActionResult SomeAction() { return new JsonpResult { Data = new { Widget = "some partial html for the widget" } }; } It says Widget = "some partial html for the widget" but this doesn't really mean anything to me. I assume that Widget would contain the HTML representing what the user wants to see on the screen, but How do I get the contents of my Partial View into Widget? Can anyone point me in the right direction? Thanks..

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  • Goodbye, Estonian Kroon. Hello, euro!

    - by Theresa Hickman
    Happy New Year! As of the stroke of midnight on 1/1/11, Estonia became a member of the Euro zone. Keeping consistent with the #1 theme, they're the first former Soviet bloc country to do so. With a population of only 1.34M (wouldn't it have been ironic if their population was 1.11M?), Estonia is one of the least-populated countries in Europe to join the European Union. Its currency, the Estonian Kroon was converted at its fixed rate of 15.6466 Kroons to the Euro. Some of its neighbors, such as Lithuania and Latvia, also hope to join the Euro zone soon, but who knows now that there is so much turmoil.

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  • How to generate "language-safe" UUIDs?

    - by HappyDeveloper
    I always wanted to use randomly generated strings for my resources' IDs, so I could have shorter URLs like this: /user/4jz0k1 But I never did, because I was worried about the random string generation creating actual words, eg: /user/f*cker. This brings two problems: it might be confusing or even offensive for users, and it could mess with the SEO too. Then I thought all I had to do was to set up a fixed pattern like adding a number every 2 letters. I was very happy with my 'generate_safe_uuid' method, but then I realized it was only better for SEO, and worse for users, because it increased the ratio of actual words being generated, eg: /user/g4yd1ck5 Now I'm thinking I could create a method 'replace_numbers_with_letters', and check that it haven't formed any words against a dictionary or something. Any other ideas? ps. As I write this, I also realized that checking for words in more than one language (eg: english and french, spanish, etc) would be a mess, and I'm starting to love numbers-only IDs again.

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  • what practical proofs are there about the Turing completeness of neural nets? what nns can execute c

    - by Albert
    I'm interested in the computational power of neural nets. It is generally accepted that recurrent neural nets are Turing complete. Now I was searching for some papers which proofs this. What I found so far: Turing computability with neural nets, Hava T. Siegelmann and Eduardo D. Sontag, 1991 I think this is only interesting from a theoretical point of view because it needs to have the neuron activity of infinite exactness (to encode the state somehow as a rational number). S. Franklin and M. Garzon, Neural computability This needs an unbounded number of neurons and also doesn't really seem to be that much practical. (Note that another question of mine tries to point out this kind of problem between such theoretical results and the practice.) I'm searching mostly for some neural net which really can execute some code which I can also simulate and test in practice. Of course, in practice, they would have some kind of limited memory. Does anyone know something like this?

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  • Unable to use Hardware Acceleration for Radeon HD 6490M card

    - by user62004
    I've followed steps in this guide. Here is output of 'vainfo' command: libva: VA-API version 0.32.0 libva: va_getDriverName() returns 0 libva: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so libva: va_openDriver() returns -1 vaInitialize failed with error code -1 (unknown libva error),exit I have Catalyst 12.6 driver installed (from debs). Also I've fixed switchable graphics bug, using this guide (STEP 2). I've tried to add 'LIBVA_DRIVER_NAME=xvba LIBVA_DRIVERS_PATH=/usr/lib/va/drivers' to /etc/environment and rebooted system, but the result was the same. PLEASE HELP! :) Thanks! :]

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  • Will search engines ever change to allow longer title and description tags? [closed]

    - by guisasso
    I was just wondering: The standard title length is 64 characters, while meta description tags are 150-160. I was thinking, that it was probably done like that originally because of screen resolutions back in the day, that could not really fit a lot of content. Google still displays search results in a incredible small resolution fixed to the left side of the browser, and it's simplicity is probably what makes it so popular. With websites such as bing, displaying a richer more vivid search experience, in your opinion, will search engines ever change to accept better and longer meta description tags and titles? (I'm asking because we work to accommodate their standards, but what if they change?)

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  • Is there an equivalent of RDP?

    - by detly
    The "Desktop Sharing" settings that come installed by default seem to use VNC. VNC is a bit of a bandwidth hog, can only work at the resolution of whatever screen is attached to the host, and mirrors every action on the host. (It also seems to work poorly with compositing, but maybe that's been fixed.) I know about X tunnelling, but that's annoying to use and doesn't always work properly (or, more accurately, some apps don't work properly). Is there any kind of protocol in between the two, similar to RDP used for Windows? Specifically, something that can run at a different resolution to the host screen and is a little lighter on the network? (Ideally, the more the protocol could have in common with RDP, the better.)

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  • Calculating very large exponents in python

    - by miraclesoul
    Dear All, Currently i am simulating my cryptographic scheme to test it. I have developed the code but i am stuck at one point. I am trying to take : g**x where g = 256 bit number x = 256 bit number Python hangs at this point, i have read alot of forums, threads etcc but only come to the conclusion that python hangs, as its hard for it to process such large numbers. any idea how can it be done? any two line piece of code, any library, anything that can be done.(ALSO PLEASE I AM A NEW PYTHON USER AND THIS IS FIRST TIME I DID PROGRAMMING IN IT, SO NO COMPLEX METHODS ...HOPE YOU UNDERSTAND :s)

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