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• kernel panic - diagnosis?

  - by user94188

  I'm having a kernel panic problem - my machine will run for hours, maybe all day and then have a panic attack. I have no idea how to interpret the output, but here's a picture of what's left on the screen when it happens: https://dl.dropbox.com/u/13279067/photo.JPG (I can't post images yet) I've looked through the logs but didn't find anything obvious - I'm still learning though so I've probably missed something. It's a little harder since it's always happened when I've been out or at night so I can't pinpoint the exact time it crashed. Anyone have advice? thanks

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• Split Texture2D Across Line

  - by Simie

  Background I'm using a texture as a damage map represented by an array of floats for displaying damage effects on a space ship in a process. An upside of this is being able to 'slice' ships in half, using an input damage map with a line down the middle, as shown in the diagram below. Question However, I'm encountering problems separating this split ship into two different entities. I would like to be able to split the image down the 'damage line', in a process similar to this: I don't have much idea where to start detecting the red line above. Any advice would be welcome.

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• No sound coming from HDMI

  - by cypwrx

  (Ubuntu 12.04 x64) After looking at other questions (here and other sites) and trying their respective answers, I am still unable to get the hdmi audio out working. I have downloaded the recommended hardware drivers for my card (radeon hd 4350), made sure that the card is not muted in alsamixer, and set it as the correct output device in sound settings. I have also disabled the onboard sound devices in the bios menu. In aplay -l, it shows my hdmi card as hw:0,3 Even after doing sound tests I still cannot hear anything. Any suggestions? Not sure where to go from here, I am fairly new to linux.

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• Compiling old versions of R (2.11 or older) on Ubuntu 13.10 (or newer)?

  - by user283293

  I am trying to compile an old version of R (2.11.1, specifically). "Why?", you might ask. Well, I have a program I am trying to run (that was not written by me, but I am hoping to use in my research) that was written in "old" R, and the program writer has specifically mentioned that R-2.11.1 or older must be used. I have run ./configure with no obvious errors (the entire output being far too long to post here, but I have been warned that I cannot make PDF, DVI, or HTML versions of the help pages, which I'm not too concerned about). Next, when I pass the make command, I am met with the following error (after a long stream of successful commands): Warning in solve.default(rgb): unable to load shared library '/home/sbowerma/Programs/R-2.11.1/modules//lapack.so': /home/sbowerma/Programs/R-2.11.1/lib/libRlapack.so: undefined symbol: _gfortran_compare_string Error in solve.default(rgb) : lapack routines cannot be loaded Error: unable to load R code in package 'grDevices' Execution halted However, I have confirmed that the library lapack.so is, in fact, in the exact position it is supposed to be.

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• No Sound via HDMI

  - by Goony Hill

  I have ubuntu installed on a Acer aspire revo 3700 intel atom processor with nvidia ion graphics this is plugged into a celcus 32 inch TV via HDMI (1080p). The video driver shows as an nvidia which I can select. I have set the sound to play via HDMI and the output to HDMI but get no sound. I have tried a sony 1080i TV with the box but get eratic results with the graphics, but the sound picks up straight away that is there is no need to select it. The graphics on the celcus TV work but I get a dialog box showing loads of different resolutions and frequencies which I have to close manually, these appear to be attempts to set different resolutions for the TV. Am I missing some sort of screen/sound driver, if so does anyone know what might support the celcus 32 inch (1080p) tv?

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• Screen Resolution Problem with Ubuntu 14.04 and VirtualBox

  - by user3341257

  Environment: Lenovo T530 running Windows 7. Have installed Ubuntu 14.04 on a virtual machine using VM Virtual Box. Have installed all the updates from both Virtual Box and Ubuntu. Problem: While in Ubuntu's desktop and other Ubuntu initiated programs, the window is reduced to about 3x4 inches showing in the middle of the rest of my regular Virtual Box window. I am seeing only the upper right hand of the screen output of what I would normally see. Please help. I've seen How do I install Guest Additions in a VirtualBox VM? But, none of these answers works in 14.04.

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• Business Analyst vs. Architect [closed]

  - by suslik

  I'm a developer of a few years in the financial industry and will soon need to decide what career path to try and row towards. Broadly speaking I have two options: something more 'people' oriented like BAs, or keep coding and try to make more technical decisions like the Architects do where I currently work. Here are my perceptions right now: Business Analysts: get paid way more than devs once they do their job, it seems like they usually have no worries more likely to go REALLY high up in the organization (VPs, etc) Architects: things like certification matters (I see this as a con) called in when things go wrong more than anyone else (weekends & overtime) long career path to get to (dev - senior dev - team lead - architect) I would find the latter more intellectually rewarding, but when I look at it I just can't justify it in terms of lifestyle. Am I wrong / what am I missing? Can you really make a lot of money in a technical role or must you really get out of coding? Thank you for any constructive input.

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• When trying running Ubuntu 12.10 off a usb drive, I encounter an error while prevent me from doing anything else

  - by Nil

  The details are that I used Universal USB Installer version 1.9.1.8 from pendrivelinux.com to install ubuntu 12.10 onto a 4gb pendrive as per instruction on Ubuntu's website. However, after I boot with drive I am met with the following message: "The system is running in low-graphics mode. Your screen, graphics card, and input device settings could not be detected correctly. You will need to configure these yourself." Pressing Ctrl Alt F1 doesn't allow me access and the options on the dialog box either send me through a loop returning me to the previous dialog or just leave me dead in the water. Pressing Ctrl Alt Del does however restart the computer if I am dead in the water, so ubuntu isn't COMPLETELY unresponsive... I feel I should mention that I'm trying to run this distribution on my netbook. I can't install it directly to the harddrive since I need my current Windows distribution for certain programs that don't quite agree with WINE yet.

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• Ideas to automate customer order processing? [on hold]

  - by user2753657

  i am looking for a way to automate the order processing in my webshop. Normally, a user buys a product in my webshop, then, i receive an order confirmation email with order details, address etc. After receiving the order email, I login to my suppliers website and input the order details manually. My supplier then ships the item to the address specified by me. I am looking for ideas how to automate this process, especially in the case if i receive for example 4-5 order emails at one time (and not one by one with several hours between)... I was looking at the program Winautomation, but i am not sure if this fits my needs. Any ideas are appreciated. thanks!

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• SDL: How would I add tile layers with my area class as a singleton?

  - by Tony

  I´m trying to wrap my head around how to get this done, if at all possible. So basically I have a Area class, Map class and Tile class. My Area class is a singleton, and this is causing some confusion. I´m trying to draw like this: Background / Tiles / Entities / Overlay Tiles / UI. void C_Application::OnRender() { // Fill the screen black SDL_FillRect( Surf_Screen, &Surf_Screen->clip_rect, SDL_MapRGB( Surf_Screen->format, 0x00, 0x00, 0x00 ) ); // Draw background // Draw tiles C_Area::AreaControl.OnRender(Surf_Screen, -C_Camera::CameraControl.GetX(), -C_Camera::CameraControl.GetY()); // Draw entities for(unsigned int i = 0;i < C_Entity::EntityList.size();i++) { if( !C_Entity::EntityList[i] ) { continue; } C_Entity::EntityList[i]->OnRender( Surf_Screen ); } // Draw overlay tiles // Draw UI // Update the Surf_Screen surface SDL_Flip( Surf_Screen); } Would be nice if someone could give a little input. Thanks.

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• How can I build this payment receipt/booking application?

  - by Festus

  I'm planning to build a payment receipt/booking application for a media company with several branches in different locations. The application should be able to move data across the network/internet to a central database where the administrator/accountant in a different location will be able to see the result of the entire job for the day from each branch. Application will run on windows environment. Will be able to send result of the booking to a Point Of Sales printer for print output. Now, I'm confused about choosing the right programming language to accomplish this task. I'm between beginner/intermediate level in PHP, I know HTML/CSS and JavaScript. I have tried to do this in PHP but, I'm face with several challenges and I fear for the POS part since PHP application run on the web browser. I don't know if python will be best suited for this and how long will it take someone with my experience level to pick up python. Any suggestion will be highly appreciated.

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• How to properly code in Unity? [on hold]

  - by Vincent B.

  I'm fairly new to Unity (yet I touched it and made a few proto with it) and I'd like to know how I'm supposed to work with it. I'm student in programming so I'm used to C/C++ with SDL/SFML, writing code and only using Input/Graphics/Network libs. I followed a few Unity guides and it was way more around drag & drop on scenes and a bit of scripting to activate it all, which disturbed me. So I fond a way to only use one GameObject and use a Singleton to launch code and display stuff (for 2d games at least). At the end of the day I make games not using "Instantiate" or such at all. Is it the right way ? Am I supposed to do this ? How much are your scenes populated (in a professional environment) ? When should I stop coding and start using the editor ?

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• How to make Ubuntu 14.04 run with less lag?

  - by King Shimkus

  I recently updated from Ubuntu 12.04 LTS to 14.04 LTS and for the first time it worked! However, whenever I move my mouse over an application icon on the unity shell, the animation takes forever to show me what the name of the application is ( A.k.a the tooltip ). The same happens with menus and sub-menus. Other than that, it is overall in general, slow. I just want to know if there are any tips to fix this or make my system faster. This is what it says when I type in glxinfo | grep renderer: GLX_MESA_multithread_makecurrent, GLX_MESA_query_renderer, OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 3.4, 128 bits) Output of lspci | grep VGA: 00:02.0 VGA compatible controller: Intel Corporation 82865G Integrated Graphics Controller (rev 02)

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• c++ and SDL: How would I add tile layers with my area class as a singleton?

  - by Tony

  I´m trying to wrap my head around how to get this done, if at all possible. So basically I have a Area class, Map class and Tile class. My Area class is a singleton, and this is causing some confusion. I´m trying to draw like this: Background / Tiles / Entities / Overlay Tiles / UI. void C_Application::OnRender() { // Fill the screen black SDL_FillRect( Surf_Screen, &Surf_Screen->clip_rect, SDL_MapRGB( Surf_Screen->format, 0x00, 0x00, 0x00 ) ); // Draw background // Draw tiles C_Area::AreaControl.OnRender(Surf_Screen, -C_Camera::CameraControl.GetX(), -C_Camera::CameraControl.GetY()); // Draw entities for(unsigned int i = 0;i < C_Entity::EntityList.size();i++) { if( !C_Entity::EntityList[i] ) { continue; } C_Entity::EntityList[i]->OnRender( Surf_Screen ); } // Draw overlay tiles // Draw UI // Update the Surf_Screen surface SDL_Flip( Surf_Screen); } Would be nice if someone could give a little input. Thanks.

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• << and >> in C++

  - by JacKeown

  I don't quite understand what this means...I'm just learning C++ from my very very very basic Python experience...and so this may be a very stupid question. My question is...say you have your classic "Hello World" program and you have the line: cout<<"Hello World!"<<endl; what does the << mean...because I was just looking at using input in C and saw that you'd do something like: int i; cini; and I noticed that it has instead of << and I've read that those are bitwise shifts...and I don't exactly understand what those are...but I think it might be different here...Help...Thanks in advance

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• Developing a search algorithm

  - by Richart Bremer

  I want to create a basic search engine, and I want you to give me some ideas how to filter out the best results for my visitors. I have three fields regarding a product the user can search in: Title Category Description I came up with these ideas and I ask you to either competently criticize them or add to them. If the search term occurs in all three fields it should be among the first results. If it is in two of the fields it is below the results of 1. Combine the amount of occurences and output a value in per cent. For instance if in all fields together the term clock appeared 50 times and in all fields together there are 200 words, then the per cent value is 50/200*100 = 25%. Another product entry amounts to say 20% so product one having 25% is listed before product two having 20%.

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• Is server validation necessary with client-side validators?

  - by peroija

  I recently created a .net web app that used over 200 custom validators on one page. I wrote code for both ClientValidationFunction and OnServerValidate which results in a ton of repetitive code. My sql statements are parameterized, I have functions that pull data from input fields and validates them before passing to the sql statements or stored procedures. And the javascript validates the fields before the page submits. So essentially the data is clean and valid before it even hits the OnServerValidate and clean after it anyways due to the aforementioned steps. This makes me question, is OnServerValidate really needed when I validate on the clientside?

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• How to run CLI commands from the launcher?

  - by user50849

  I press ALT+F2 key on my keyboard, and get the launcher HUD up. From there I enter a command as I would in a shell, specifically vlc ~/Music/* -Z. If done from a shell, vlc starts and begins to play music. However, when done from the launcher, VLC replies: File reading failed: VLC could not open the file "/home/[username]/Music/*". (No such file or directory) user Your input can't be opened: VLC is unable to open the MRL 'file:///home/[username]/Music/%2A'. Check the log for details. I can't quite figure out what the difference is.

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• Getting Started with 12.04 LTS Problems

  - by mark

  Okay previously I used ubuntu 10.04 in Desktops and Loved it! I bought a newer Toshiba Satellite with an i7 CPU, 8GB Ram, 1TB HD, first thing I tried to do was install Ubuntu 9 on it then I found out it was no longer Supported. (I gave my 10.04 disk away) So I tried installing Windows 7 and experienced SO MANY problems, I am going back to try 12.04. Starting all over again. After installing 12.04 Wireless was Detected yet said it was Disabled by a Hardware Switch. Went read through the Message Boards found Solution which was Sudo rf Kill All. Okay all excited I would finally get my Ubuntu to finally work I rushed back to my laptop from the internet cafe, and went looking for the TERMINAL input on my Ubuntu 12.04, and I cannot find the Terminal. If I can't find the TERMINAL how Can I enter any Sudo Stuff? So I guess the first question is Where is the Terminal Located in 12.04? Thank you.

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• can't chmod on external hard disk?

  - by G. He

  I have an USB3.0 external hard disk, partitioned to 3 NTFS partitions. When I plug the hard disk in, the 3 partitions automatically mounted under /media. So far so good. I can read and write to files, or mkdir, etc on these partitions. But I can't do chmod/chown on any of the files/directories on these partitions. The owner:group always myself, and the mode are always 700 for directories and 600 for files. I have another partition on internal harddisk also mounted. That partition works fine. I looked the output of mount command, the only difference between mount options is that there is one extra 'default_permissions' on the external hard disks. Anyway I can set the owner:group and mode on these files and directories.

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• how to easy change some colors with special theme?

  - by eexp

  i use AuroraMint as my themes. but some colors mess up my opera. when i use "gnome-appearance-properties-customize theme-Colors", i only can found input boxes' text color here. but i still want change background colors in email list (opera use GTK theme here). Gui give only 4 group colors here, so poor. GtkColorScheme=fg_color:#cbf6d4d4bf8c,bg_color:#311133332e14,text_color:#8713a9515723,base_color:#444f47474026,selected_fg_color:#f554ffffe666,selected_bg_color:#9797bfbf6060,tooltip_fg_color:#000000000000,tooltip_bg_color:#f5f5f5f5b5b5 i thought maybe some software can use mouse click to found out widgets under mouse point, for i does not know which widget is email list used (if i change gtkrc file).

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• W520 External monitor setup with Ubuntu 12.10

  - by user108372

  I just installed a fresh Ubuntu 12.10 64-Bit Desktop on my Lenovo W520. It looks like there are a lot of challenges around making it work with out of the box Nouveau drivers or propriety Nvidia drivers or Intel GPU. I looked at couple of notes on how to make it work with Bumblebee with Optimus Nvidia. None of them seems to work for 12.10. Anybody has a solid answer on this? It seems like a lot of people are suffering from this. Here is my xrandr output. Let me know if you need any additional information. Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 LVDS1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm 1920x1080 60.0*+ 59.9 50.0 1680x1050 60.0 59.9 1600x1024 60.2 1400x1050 60.0 1280x1024 60.0 1440x900 59.9 1280x960 60.0 1360x768 59.8 60.0 1152x864 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) Thanks, Sef

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• Getting wireless N to work on Dell Vostro 3300?

  - by luisfpg

  I have a Dell Vostro 3300, which has a Broadcom BCM4313 wireless. The point is that I cannot make it work in N mode. NetwotkManager applet says I'm on 54 Mbit/s. Of course, my wireless router is N capable. I've double checked. Anyone knows what to do? Here is the output for lspci -v: 12:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) Subsystem: Dell Device 0010 Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at fbb00000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: wl Kernel modules: wl, brcm80211 Thanks a lot.

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• Tweaking Hudson memory usage

  - by rovarghe

  Hudson 3.1 has some performance optimizations that greatly reduces its memory footprint. Prior to this Hudson used to always hold the entire data model (all jobs and all builds) in memory which affected scalability. Some installations configured heap sizes in excess of 1GB to counteract this. Hudson 3.1.x maintains an MRU cache and only loads jobs and builds as they are required. Because of the inability to change existing APIs and be backward compatible with plugins, there were limits to how far we could go with this approach. Memory optimizations almost always come with a related cost, in this case its additional I/O that has to be performed to load data on request. On a small site that has frequent traffic, this is usually not noticeable since the MRU cache will usually hold on to all the data. A large site with infrequent traffic might experience some delays when the first request hits the server after a long gap. If you have a large heap and are able to allocate more memory, the cache settings can be adjusted to take advantage of this and even go back to pre-3.1 behavior. All the cache settings can be passed as options to the JVM container (Tomcat or the default Jetty container) using the -D option. There are two caches, independant of each other, one for Jobs and the other for Builds. For the jobs cache: hudson.jobs.cache.evict_in_seconds ( default=60 ) Seconds from last access (could be because of a servlet request or a background cron thread) a job should be purged from the cache. Set this to 0 to never purge based on time. hudson.jobs.cache.initial_capacity ( default=1024 ) Initial number of jobs the cache can accomodate. Setting this to the number of jobs you typically display on your Hudson landing page or home page will speed up consecutive access to that page. If the default is too large you may consider downsizing and using that memory for the Builds cache instead. hudson.jobs.cache.max_entries ( default=1024) Maximum number of jobs in the cache. The default is large enough for most installations, but if you find I/O activity when always accessing the hudson home page you might consider increasing this, but first verify if the I/O is caused by frequent eviction (see above), rather than by the cache not being large enough. For the builds cache: The builds cache is used to store Build objects as they are read from storage. Typically this happens when a user drills down into the details of a particular Job from the hudson hom epage. The cache is shared among builds for different jobs since in most installations all jobs are not accessed with the same frequency, so a per-job builds cache would be a waste of memory. hudson.job.builds.cache.evict_in_seconds ( default=60 ) Same as the equivalent Job cache, applied to Build. hudson.job.builds.cache.initial_capacity" ( default=512 ) Same as equivalent Job cache setting. Note the smaller initial size. If your site stores a large number of builds and has frequent access to more builds you might consider bumping this up. hudson.job.builds.cache.max_entries ( default=10240 ) The default max is large enough for most installations, the builds cache has bigger sized objects, so be careful about increasing the upper limit on this. See section on monitoring below. Sample usage: java -jar hudson-war-3.1.2-SNAPSHOT.war -Dhudson.jobs.cache.evict_in_seconds=300 \ -Dhudson.job.builds.cache.evict_in_seconds=300 Monitoring cache usage The 'jmap' tool that comes with the JDK can be used to monitor cache performance in an indirect way by looking at the number of Job and Build objects in each cache. Find the PID of the hudson instance and run $ jmap -histo:live <pid | grep 'hudson.model.*Lazy.*Key$' Here's a sample output: num #instances #bytes class name 523: 28 896 hudson.model.RunMap$LazyRunValue$Key 1200: 3 96 hudson.model.LazyTopLevelItem$Key These are the keys to the Jobs (LazyTopLevelItem$Key) and Builds (RunMap$LazyRunValue$Key) in the caches, so counting the number of keys is a good indicator of the number of items in the cache at any given moment. The size in bytes can be ignored, they are just the size of the keys, not the actual sizes of the objects they hold. Those sizes can only be obtained with a profiler. With the output above we can conclude that there are 3 jobs and 28 builds in memory. The 28 builds can all be from 1 job or all 3 jobs. Over time on an idle system, these should get evicted and memory cache should be empty. In practice, because of background cron threads and triggers, jobs rarely fall down to zero. Access of a job or a build by a cron thread resets the eviction timer.

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• No Windows Option on Boot

  - by Okoning

  I've installed Ubuntu alongside Windows but at first didn't have a boot option menu. So, I installed bootrepair and ran it. This succeeded in granting me a GRUB boot option menu, but Windows isn't on it. Here is the bootrepair report: http://paste.ubuntu.com/8098527 Can anyone tell me what might be wrong? EDIT: I ran sudo fdisk -l and this is the output: Disk /dev/sda: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00023fe0 Device Boot Start End Blocks Id System /dev/sda1 * 2048 960096255 480047104 83 Linux /dev/sda2 960098302 976771071 8336385 5 Extended /dev/sda5 960098304 976771071 8336384 82 Linux swap / Solaris Disk /dev/sdb: 32.0 GB, 32015679488 bytes 255 heads, 63 sectors/track, 3892 cylinders, total 62530624 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 * 32 62530623 31265296 c W95 FAT32 (LBA)

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