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• Ubuntu 12.04 wont install on Macbook

  - by user92325

  I've installed Ubuntu on my Macbook before but something went wrong with the updater. So, I had to backup my HDD and format it and reinstall OS X Lion. But here's the thing: Ever since I re-installed my OS I've been trying to get Ubuntu back on the HDD. I partitioned it to 40 GB and set the file system to Ext4. I also recently created a swap partition too and it seems to install correctly. After i installed rEFIt it just has this cute little penguin sitting there. I rebooted and tried to go back to Ubuntu and the penguin still shows up but this time a black screen pops up and it asks me to insert a bootable device and press any key. I'm not sure why this is happening. This is probably the 5th time I've tried to install it. I've even used a different Ubuntu ISO but it still won't boot after the installation.

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• How can I enable audio system on Envy 15t-3200

  - by Dean Howell

  I just received my HP Envy 15 (June 2012 model) and I cannot get my audio system to fully function. This laptop has 6 speakers. 1.) 2 speakers on the front of the laptop (Stereo). 2.) 2 speakers above the keyboard, just before the LCD hinges. 3.) 2 Subwoofer speakers underneath the battery cover facing downward. Only the 2 speakers in the front are working. This is a "Beats" audio system. There have been many beats audio laptops before this one, so maybe if someone has experience with those, it might translate to this device.

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• Mounting filesystem with special user id set

  - by qbi

  I want to mount the device /dev/sda3 to the directory /foo/bar/baz. After mounting the directory should have the uid of user johndoe. So I did: sudo -u johndoe mkdir /foo/bar/baz stat -c %U /foo/bar/baz johndoe and added the following line to my /etc/fstab: /dev/sda3 /foo/bar/baz ext4 noexec,noatime,auto,owner,nodev,nosuid,user 0 1 When I do now sudo -u johndoe mount /dev/sda3 the command stat -c %U /foo/bar/baz results in root rather than johndoe. What is the best way to mount this ext4-filesystem with uid johndoe set?

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• Skynet Big Data Demo Using Hexbug Spider Robot, Raspberry Pi, and Java SE Embedded (Part 4)

  - by hinkmond

  Here's the first sign of life of a Hexbug Spider Robot converted to become a Skynet Big Data model T-1. Yes, this is T-1 the precursor to the Cyberdyne Systems T-101 (and you know where that will lead to...) It is demonstrating a heartbeat using a simple Java SE Embedded program to drive it. See: Skynet Model T-1 Heartbeat It's alive!!! Well, almost alive. At least there's a pulse. We'll program more to its actions next, and then finally connect it to Skynet Big Data to do more advanced stuff, like hunt for Sara Connor. Java SE Embedded programming makes it simple to create the first model in the long line of T-XXX robots to take on the world. Raspberry Pi makes connecting it all together on one simple device, easy. Next post, I'll show how the wires are connected to drive the T-1 robot. Hinkmond

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• Broadcom 4365 wireless driver on 12.04 with 3.4 / 3.5 kernel

  - by zaid

  I used this package to install the driver on 3.2 Kernel and it was working perfectly. Unfortunately the system used to freeze randomly with 3.2 kernel so I installed 3.4 kernel, now there is no freezing, the only problem is that my wifi card is not working, I tried to re-install the package, but didn't work. I can see the driver in the "additional drivers" and it say that it is active, but when I execute iwconfig it doesn't show up. I've even tried ndiswraper and that didn't work either. my lspci: 01:00.0 Network controller: Broadcom Corporation Device 4365 (rev 01)

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• No mention of ARM versions of Lubuntu .. on the main website?

  - by Mike

  Just a question for the Lubuntu team really - I am a huge fan of Lubuntu - thank you and congratulations on creating a great distribution. I am just surprised to notice that, the main website doesn't mention that there are ARM versions - or provide any links to download. Is that because they are 'unofficial' in some sense ? I am running Lubuntu 11.10 on an Allwinner A10 device (the MK802) and it works a treat. Don't "hide your light" guys - tell the world Lubuntu is a cracking OS for ARM systems.

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• How to route KVM virtual machine audio to Ubuntu 11.10 host using virt-manager?

  - by iGadget

  I've been using KVM in combination with Virt-Manager and Remmina at a fair success up until now. The issue I need to solve now is to get audio from a virtualized Windows XP and make it audible on the Ubuntu 11.10 host. Remmina / RDP works for 'simple' audio (system sounds and such), but when the source gets trickier (e.g. Flash audio), Remmina / RDP messes up. So I figured I'd just connect to the machine directly using Virt-Manager. Unfortunately, it seems that even though I have successfully configured the AC97 audio device on WinXP, it's unable to get it's output to the Ubuntu host. This is probably because Virt-Manager uses VNC (and AFAIK, VNC doesn't transport audio). Does anyone know if there is a solution to fix this? I've heard of Spice, but the installation required so much voodoo last time I checked, I figured I'd let that solution boil to maturity a little longer ;) But perhaps there are other options I haven't thought of yet (which don't require switching to VirtualBox / VMware)...

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• Microsoft Sync. Framework with Azure on iOS

  - by Richard Jones

  A bit of a revelation this evening. I discovered something obvious, but missing from my understanding of the brilliant iOS example that ships with the Sync. Framework 4.0CTP It seems that on the server side if a record is edited, correctly only the fields that are modified gets sent down to your device (in my case an iPad). I was previously just blindly assuming that I'd get all fields down. I modified my Xcode population code (based on iOS sample) as follows: + (void)populateQCItems: (id)dict withMetadata:(id)metadata withContext:(NSManagedObjectContext*) context { QCItems *item = (QCItems *)[Utils populateOfflineEntity:dict withMetadata:metadata withContext:context]; if (item != nil) // modify new or existing live item { if ([dict valueForKey:@"Identifier"]) // new bit item.Identifier = [dict valueForKey:@"Identifier"]; if ([dict valueForKey:@"InspectionTypeID"]) // new bit item.InspectionTypeID = [dict valueForKey:@"InspectionTypeID"]; [item logEntity]; } } I hope this helps someone else; as I learnt this the hard way. Technorati Tags: Xcode, iOS, Azure, Sync Framework, Cloud

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• Android opengles 2.0 :different resolutions rendering and input

  - by kkan

  I'm currently developing a sprite based 2D game for android using opengles 2.0. I've got some basic rendering done that mimics the spritebatch functionality of xna (draw sprite, rotation, color). But all of this works for a fixed projection matrix, but android has a lot of screen sizes. Q1)Would this be an okay method to scale up/down the drawing? 1)Draw the whole screen to a texture. 2)Draw the above texture as a quad to the device. I found the above through some searching, not sure if it's the best one, are there any alternatives? Q2)How do you handle inputs for different resolutions? I currently get the position of a touch and use it raw. Would it be okay to get the position, and then scale the position to size of the texture used for rendering, and the perform calculations on it? Thanks.

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• What's the difference or purpose of a file format like ELF when flat binaries take up less space and can do the same thing?

  - by Sinister Clock

  I will give a better description now. In Linux driver development you need to follow a specification using an ELF file format as a finalized executable, i.e., that right there is not flat, it has headers, entry fields, and is basically carrying more weight than just a flat binary with opcodes. What is the purpose or in-depth difference of a Linux ELF file for a driver to interact with the video hardware, and, say, a bare, flat x86 16-bit binary I write that makes use of emulated graphics mode on a graphics card and writes to memory(besides the fact that the Linux driver probably is specific to making full use of the hardware and not just the emulated, backwards compatible memory accessing scheme). To sum it up, what is a difference or purpose of a binary like ELF with different headers and settings and just a flat binary with the necessary opcodes/instructions/data to do the same thing, just without any specific format? Example: Windows uses PE, Mac uses Mach-O/PEF, Linux uses ELF/FATELF, Unix uses COFF. What do any of them really mean or designate if you can just go flat, especially with a device driver which is system software.

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• Macbook Pro late 2011 screen brightness issue

  - by buchzumlesen

  The keys to set the screen brightness work properly but everytime I reboot, the screen brightness is reverted to 100%, which is very annoying. I've already tried to add the following lines to /etc/rc.local but with no success (only the keyboard backlight stays off): #!/bin/sh -e # # rc.local # # This script is executed at the end of each multiuser runlevel. # Make sure that the script will "exit 0" on success or any other # value on error. # # In order to enable or disable this script just change the execution # bits. # # By default this script does nothing. echo '1' > /sys/devices/platform/applesmc.768/leds/smc::kbd_backlight/brightness echo '6' > /sys/class/backlight/acpi_video0/brightness rfkill block bluetooth exit 0` This worked for me when I was using Ubuntu 12.04 and also did after the upgrade to 12.10 but then after rebooting the screen brightness always reverted to 100%. Would be nice if anyone knows how to fix this. My device: Macbook Pro 13" Late 2011 Thanks in advance!

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• Control external monitor brightness

  - by remi

  Hello Ubuntu community, I can control the brightness of my DELL U2713HM connected with DisplayPort via the command: ddccontrol -p -r 0x10 -w 53 where in this example the number 53 represents the brightness level (range 0 to 100). But I don't know how to link the command to my brightness keys on my keyboard. I searched already, but just found answers to integrated laptop screens. In /sys/class/backlight is the folder acpi_video0 with some subfolders and files. The file actual_brightness contains a number from 0 to 20, which is changing when I press the brightness keys. How do I get my external monitor listed as a device in /sys/class/backlight ? PS: I am running a fresh Ubuntu 12.10 install with integrated graphics Intel HD4000.

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• Oracle Catalog – product overview for middleware

  - by JuergenKress

  Are you looking for quick overview of all the Oracle product and solutions? The answer is the Oracle Catalog which helps you to understand the whole stack from hardware, database, middleware all the way to applications. A great source and helpful for sales persons and customers. Make sure you add the file to your mobile device. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Technorati Tags: Catalog,SOA Community,Oracle SOA,Oracle BPM,Community,OPN,Jürgen Kress

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• How to fix Bluetooth Sound in Ubuntu 11.10

  - by Cerin

  Bluetooth sound worked perfectly for me in Ubuntu 10.04. I recently upgraded to 11.10, and although sound in general works fine, Bluetooth sound almost never works. My headset is paired, and Sound Settings shows it's selected as the output device, but no sound is being output. I've tested the headset with other devices, and confirmed it still works, so the issue is definitely with 11.10. I'm not seeing any explicit errors and I can't find any similar issues with 11.10 through Google. I tried restarting the bluetooth service, but that had no effect. What can I do to fix this?

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• Disabled WiFi but it keeps re-enabling itself; want it to stay disabled

  - by Mike Uresti

  I have an Alienware X51 desktop with a wireless card, I have it connected via ethernet and want to permanently disable WiFi from ever using itself. When running Windows, I go to device manager and rightclick-disable the Wireless card and that takes care of my problem. Is there a similar method using Ubuntu 14.04? For now, I click on the network icon in the system tray and uncheck 'Enable wifi' but it seems to turn itself back on as I use my computer, I think I have the incident isolated to something with Steam. It seems like after I start the Steam client it always is re-enabled. Hopeful answer: Just disable/remove/block wireless card from ever working.

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• Multicast in Ubuntu

  - by iwant2learn

  Can some one please explain the steps required to configure a multicast in Ubuntu? I have a simple program taken from Internet. I get errors when I execute the client program. I get the error as: Opening datagram socket....OK. Setting SO_REUSEADDR...OK. Binding datagram socket...OK. Adding multicast group error: No such device: When I execute the server program I get the error as: Opening the datagram socket...OK. Setting local interface error: Cannot assign requested address I am using Ubuntu to run the program. I have two different laptops but connected via the same network. I am using wireless network to perform the above operation.

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• Logitech Microphone (AK5370) inaudible volume

  - by Iain Lane

  I bought this microphone from Amazon last week. It's detected just fine in 12.10. I can see it in the sound preferences. The problem is that the volume is so low as to be inaudible, even when turned up to maximum in this dialog. It is working, as I can see that the meter responds to noise, but it's just too low. alsamixer's control is the same, so that doesn't help. I tried messing around in pulseaudio too, but to no avail. In lsusb it's Bus 002 Device 004: ID 0556:0001 Asahi Kasei Microsystems Co., Ltd AK5370 I/F A/D Converter.

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• Mobile broadband not connect without unplug and plug

  - by Muhammad Zohaib

  I have recently installed ubuntu 13.10 and I am still very new in this operating system. My problem is that when I start my computer, it detects all the wifi connections around but not my mobile broadband usb connection (huwaie). I dont get any mobile broadband section automatically. I have to unplug and then plug my broadband usb to connect and have mobile broadband section available. I dont like to unplug and then plug my device always as it will loose my laptop and I always want to be plug in laptop even in shutdown. I always want to auto detect my usb broadband by ubuntu. Please someone guide me. Thanks in advance.

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• hPalm and a web-centric strategy

  The acquisition battle has come and gone, and it’s HP that’s become Palm’s new owner. In general this news has been greeted withgladcries,despite (or maybe because) it was so unexpected. In general everybody assumes that the marriage of Palm software and HP hardware will be a good one, and that HP will also release a webOS-based tablet device.However, there’s an interesting dissenting opinion on VisionMobile (a blog I highly recommend, by the way). Guest author Michael Valukenko sees few synergies...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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• Units in tile world

  - by Vilzow

  I've started to make a 2D sidescroller, the camera and world rendering works as I expect, but now comes the physics part of world. What I need is that one tile in x direction (or y direction) should correspond to 1 meter. Since I have a variable time step (android mobile game), I can't figure it out, since the timing and velocity always will be dependent of the device. So, is there any good way to make one tile to correspond 1 meter? This would be good, otherwise the physics implementation would later be weird.

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• Getting the front buffer into a gfx mem surface (Dx9)

  - by lapin

  I'm using DirectX 9 to acquire the frontbuffer. There are a couple of ways I know of to get at the front buffer: GetRenderTargetData() GetFrontBufferData() The MSDN page on both of these API calls state that the data is copied from device memory to system memory. I'd like to copy the front buffer surface directly to another graphics memory surface, as I have other manipulations to perform on the acquired surface before returning it to system memory. I'm creating a D3DUSAGE_DYNAMIC texture (gfx mem texture) and calling GetFrontBufferData() to write the front buffer to my textures surface0. Is this valid? Will the operation remain in gfx memory, or will it need to move to system memory and then back to graphics memory? If this is the case, is what I'm trying to achieve possible?

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• No wifi using Ubuntu on laptops

  - by Pete G

  I have loaded Ubuntu onto two different laptops and both had the same result...no WiFi. I could access the internet if I plugged into Ethernet port but try as I might, I just could not access WiFi. I even tried Wine to install a Windows based external usb WiFi device but again...nothing. It functioned normally in Windows but with Ubuntu installed....nothing and this was the same whether it installed just Ubuntu or dual booted with Windows. Any suggestions? Thx!

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• A real noob question

  - by Jaymz

  I have a Hp mini netbook that has been wiped clean, there is nothing other than the bios on it, it has no DVD and I don't have an external DVD. I can change the boot order to boot from a usb device. I have downloaded ubuntu-12.04.1-desktop-i386 I have one of these http://www.kikatek.com/P100600/34609-IOMEGA-250gb-Select-Portable-HDD-2-5-USB?source=froogle currently formatted to NTFS but I can format to exFAT I have tried Linuxlive USB creator, all that managed to do was dual boot the desktop pc that I'm working off, and when booting on the wiped clean netbook, just left me with a black screen with a blinking cursor I have also tried Unetbootin, this managed to change my 'My Computer' icon to Install Ubuntu (C:) and now again, my desktop pc dual boots with the Wubi software, the Unetbootin, wouldn't let me select my external drive to write to Please I'm a complete idiot, i need a super idiots guide to doing this Regards Jaymz

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• OPN Solutions Catalog Goes Mobile!

  - by Richard Lefebvre

  We are pleased to announce the launch of a mobile-ready OPN Solutions Catalog Features include: A fluid search and browse experience regardless of device (phone, tablet, or desktop) Streamlined design and reorganized search facets, making it easier for customers to search and browse partner profiles and solutions The OPN Solutions Catalog is a free marketing tool for all active Oracle PartnerNetwork members. If you are an OPN partner… take advantage of it! To learn more about the new catalog, watch the Solutions Catalog Training which includes best practices and a demo on how to update your profile. Spend a few minutes with our experts to learn how you can expand your market reach and showcase your offerings to our customers, partners, and Oracle employees worldwide. Questions? Visit the Solutions Catalog Resource page or contact the Partner Business Center.

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• Amazon Kindle - Whispersync implementation?

  - by Bala

  For those who are not aware of Kindle's whispersync, here is how it works (from amazon.com): "...Whispersync synchronizes the bookmarks and furthest page read among devices registered to the same account. Whispersync is on by default to ensure a seamless reading experience for a book read across multiple Kindles." Can anyone give some details on how the Whispersync feature is implemented in Kindle and in the Backend of Amazon? I am guessing this implementation involves a very simple hashmap for each user account. Each hashmap maps Books with satellite information about the book. Satellite information contains bookmarks, furthest page read, device on which it was read, etc.. Thanks!

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