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• Blank screen after GRUB (64 bit) - cannot install Ubuntu

  - by peGGi

  My laptop's specs: Lenovo IdeaPad Z570 Intel Core i5-2410M @ 2.3Ghz 6 Gb RAM DDR3 640 Gb ATAPI Hard-disk Drive @ 5,200 RPM NVIDIA GeForce G520M with Optimus switching technology Broadcom 802.11n Network Adapter REALTEK soundcard Windows 7 Home Premium 64-bit I downloaded Ubuntu Studio 11.04 and burned the iso image onto two different DVDs, using two different programs (one DVD is RW, the other is just R). I verified the hash MD5sum thing. I get as far as GRUB with the 4 options (install, advanced install, disk verification, system rescue) but no matter which one I select, I get a blank screen and nothing happens. The DVD drive spins down after about 30 seconds. Also just before the GRUB screen I get a message saying Error: "Prefix" is not set. I'm not sure if that's relevant. I have tried all the options using both DVDs. Same thing happens. I have changed the graphics setting in BIOS to UMA or Optimus, but still happens either way. I've tried booting with the wireless switch turned off, same thing happens. I downloaded 'vanilla' Ubuntu 64-bit and burned onto a CD, and the same thing happens. I have downloaded Ubuntu 32-bit and I am able to boot from the live CD (interestingly the wireless card won't work, but that's maybe another issue). I have searched extensively through these forums and other sites but I can't see anything that will help me. Is there something I'm missing? I'd really appreciate help on this. The laptop is less than 2 weeks old. I was so looking forward to getting Ubuntu Studio up and running. I've gone about as far as my technical abilities will allow.

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• Teaching OO to VBA developers [closed]

  - by Eugene

  I work with several developers that come from less object oriented background like (VB6, VBA) and are mostly self-taught. As part of moving away from those technologies we recently we started having weekly workshops to go over the features of C#.NET and OO practices and design principles. After a couple of weeks of basic introduction I noticed that they had a lot of problems implementing even basic code. For instance it took probably 15 minutes to implement a Stack.push() and a full hour to implement a simple Stack fully. These developers were trying to do things like passing top index as a parameter to the method, not creating an private array, using variables out of scope. But most of all not going through the "design (dia/mono)log" (I need something to do X, so maybe I'll make an array, or put it here). I am a little confused because they are smart people and are able to produce functional code in their traditional environments. I'm curious if anybody else has encountered a similar thing and if there are any particular resources, exercises, books, ideas that would be helpful in this circumstance.

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• Creating a bootable flash without overlayfs

  - by Septagram

  I want to create an USB stick to carry my Ubuntu everywhere around with me. It's not intended to spread Ubuntu by installing it everywhere, but rather for running my configured system on any computer I come across. So far, I went with installing Ubuntu with unetbootin, however, I have some issues with this. When installed with netbootin, the original disk image is kept intact on the flash drive, forever. Also, a file is created for persistent storage and during boot it is accessed together with the image by overlayfs. This, in my opinion, has the following problems: If system is updated regularly, then files from the image are overwritten in persistent storage, doubling their size and wasting precious space. Persistent storage has a fixed size that you have to define from the start, again, wasting precious space. I'm not 100% sure, but maybe using overlayfs makes disk access slower, and more so on the relatively slow devices. So I'd like to find another solution: either to get rid of the original image or to install Ubuntu "normally" on the separate ext2 partition, or maybe even install it in the main vfat partition on the USB stick. Suggestions?

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• Operating System not Found after installing Ubuntu in a Sony Vaio

  - by diego8arock

  I just bought a Sony Vaio SVS15115FLB that came with Windows 7, after enjoying the PC graphic power for a little, I decided it was time to install Ubuntu 12.04. First, I inserted a USB stick, reboot, press F11 but a message saying that no OS was found on the USB, so then I used a live CD. It booted fine and I installed Ubuntu, then when it was time to restart the PC, it didn't boot to GRUB but it went straight to Windows and it began an startup error and was looking for a solution, after it was done, it restarted and then it booted again to Windows and to the same start up error solution thing. I freaked out, so I booted again the Ubuntu live CD, and installed Ubuntu over everything, after it installed I rebooted and then a message appeared saying Operating system Not Found, and I have no idea why. So I Googled again and found this post on Boot Partition, I did everything exactly on that post, but it didn't work (by the way, this was the message): The boot files of [Ubuntu 12.04 LTS] are far from the start of the disk. Your BIOS may not detect them. You may want to retry after creating a /boot partition (EXT4, >200MB, start of the disk). This can be performed via tools such as gParted. Then select this partition via the [Separate /boot partition:] option of [Boot Repair]. It appeared the first time, then I did it all again and then it was gone. I rebooted and nothing, the same Operating System not found message appeared. So I decided to create a partition for Windows, hoping for something, but the message still appears. I really have no idea what to do, but there is something odd, if I insert the USB stick containing Ubuntu 11.10, the message that says that there is no OS in the PendDrive flashes for a fraction of a second and the boot straight to Ubuntu 12.04 without problems (and booted to Windows when I installed it, ignoring Ubuntu), right now I'm using it like that, but its pretty annoying. Can anyone advise me how to fix this? I'm no expert on this kind of things (boot, GRUB, recovery and stuff like that).

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• Restoring GRUB2 on Software RAID 0 using LiveCD after Windows 7 wiped it

  - by unknownthreat

  I have installed Ubuntu 10.10 on my system. However, I need to install Windows 7 back, and I expect that it would alter GRUB and it did. Right now, my partition on my Software RAID 0 looks like this: nvidia_acajefec1 is Ubuntu 10.10 and nvidia_acajefec3 is Windows 7. I've been following some guides around and I am always stuck at GRUB not able to detect the usual RAID content. I've tried running: sudo grub > root (hd0,0) GRUB complains it couldn't find my hard disk. So I tried: find (hd0,0) And it complains that it couldn't find anything. So I tried: find /boot/grub/stage1 It said "file not found". Here's the text from the console: ubuntu@ubuntu:~$ grub Probing devices to guess BIOS drives. This may take a long time. [ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ] grub> root (hd0,0) root (hd0,0) Error 21: Selected disk does not exist grub> find /boot/grub/stage1 find /boot/grub/stage1 Error 15: File not found Fortunately, I got one person suggesting that what I've been trying to do is for GRUB Legacy, not GRUB2. So I went to the suggested website, ** (http://grub.enbug.org/Grub2LiveCdInstallGuide) **try to look around, and try: ubuntu@ubuntu:~$ sudo fdisk -l Unable to seek on /dev/sda This is just the step 2 of the instruction in the http://grub.enbug.org/Grub2LiveCdInstallGuide and I cannot proceed because it cannot seek /dev/sda. However, ubuntu@ubuntu:~$ sudo dmraid -r /dev/sdb: nvidia, "nvidia_acajefec", stripe, ok, 488397166 sectors, data@ 0 /dev/sda: nvidia, "nvidia_acajefec", stripe, ok, 488397166 sectors, data@ 0 So what now? Do you have an idea for how to make fdisk see my RAID array on live cd (Ubuntu 10.10)? Honestly, I am lost, very lost in trying to restore GRUB2 on this software RAID 0 system right now.

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• Microsoft ADO.NET 4 Step by Step

  - by Sahil Malik

  Ad:: SharePoint 2007 Training in .NET 3.5 technologies (more information). Many years ago, I wrote Pro ADO.NET 2.0. I still think that in the plethora of new data access technologies that have come out since, the basic core ADO.NET fundamentals are still every developer must know, and sadly they do not know. So for some crazy reason, I still see every project make the same data access related mistakes over and over again. Anyway, the challenge is that on top of the core ADO.NET fundamentals, there is a vast array of other new technologies you must learn. The important of which is Entity Framework. So, I was asked to, and I was pleased to be the technical reviewer for Microsoft ADO.NET 4, Step by Step, by Tim Patrick. This book introduces the reader not just to the basic ADO.NET principles, but also Entity Framework, LINQ to SQL, and WCF Data Services. So what you may ask is a SharePoint guy like me doing with such interest in ADO.NET land? Well, that’s what the other side says, what is a hardcore data access sorta guy doing in SharePoint land? :). I have authored/co-authored 4 books so far on data access (1,2,3,4), and one on pure SharePoint, and now one on SharePoint 2010 BI. These are very intertwined topics. And LINQ to SQL and LINQ to SharePoint are almost copy paste of each other. WCF Data services are literally the same in both. And many Entity Framework concepts also apply within SharePoint. So there, I did these both for “interest” reasons. Comment on the article ....

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• Problem with APTonCD application

  - by Harikrishnan

  I created a iso image using aptoncd & burned it to a dvd. Now when i tried to restore, the program does not detect the dvd in the drive. It shows "Please insert a disc in the drive." and if we click "ok" it shows E: Failed to mount the cdrom. The dvd is in the drive itself. I tried sudo lshw -C disk and the output is: *-cdrom description: DVD-RAM writer product: DVDRAM GH22NS50 vendor: HL-DT-ST physical id: 1 bus info: scsi@1:0.0.0 logical name: /dev/cdrom logical name: /dev/cdrw logical name: /dev/dvd logical name: /dev/dvdrw logical name: /dev/scd0 logical name: /dev/sr0 logical name: /media/APTonCD logical name: /media/apt version: TN02 capabilities: removable audio cd-r cd-rw dvd dvd-r dvd-ram configuration: ansiversion=5 mount.fstype=iso9660 mount.options=ro,relatime,uid=1000,gid=1000,iocharset=utf8,mode=0400,dmode=0500 state=mounted status=ready *-medium physical id: 0 logical name: /dev/cdrom logical name: /media/APTonCD logical name: /media/apt configuration: mount.fstype=iso9660 mount.options=ro,relatime,uid=1000,gid=1000,iocharset=utf8,mode=0400,dmode=0500 state=mounted Then i checked in disk utility application. in that dvd rom is shown as /dvd/sr0 My ubuntu version is 10.10. Please help me to solve the problem.

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• Does an inexperienced programmer need an IDE?

  - by Torben Gundtofte-Bruun

  Reading this other question makes me wonder if I (as an absolute beginner PHP programmer) should stick with WAMP and Notepad++ or to switch to some IDE like Eclipse. It's understandable that skilled developers will benefit from a big shiny IDE. But why should an absolute beginner use an IDE? Do the benefits outweigh the extra challenge of learning the IDE on top of learning to develop? Update for clarification: My goal is to get some basic programming experience. By choosing PHP and WAMP (and FogBugz and Kiln) I hope to avoid having to navigate the tricky / messy OS specifics and compiling etc. and just focus on basic functionality like an online user registration form. I've got lots of theoretical understanding from university a decade ago but no practical experience. I want to remedy that with a hobby project that would be similar to a real-world sellable web app. There are so many questions to ask. So many pitfalls I probably have to blunder into. This question is just one piece (my first!) of that puzzle.

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• Groovy Refactoring in NetBeans

  - by Martin Janicek

  Hi guys, during the NetBeans 7.3 feature development, I spend quite a lot of time trying to get some basic Groovy refactoring to the game. I've implemented find usages and rename refactoring for some basic constructs (class types, fields, properties, variables and methods). It's certainly not perfect and it will definitely need a lot fixes and improvements to get it hundred percent reliable, but I need to start somehow :) I would like to ask all of you to test it as much as possible and file a new tickets to the cases where it doesn't work as expected (e.g. some occurrences which should be in usages isn't there etc.) ..it's really important for me because I don't have real Groovy project and thus I can test only some simple cases. I can promise, that with your help we can make it really useful for the next release. Also please be aware that the current version is focusing only on the .groovy files. That means it won't find any usages from the .java files (and the same applies for finding usages from java files - it won't find any groovy usages). I know it's not ideal, but as I said.. we have to start somehow and it wasn't possible to make it all-in-one, so only other option was to wait for the NetBeans 7.4. I'll focus on better Java-Groovy integration in the next release (not only in refactoring, but also in navigation, code completion etc.) BTW: I've created a new component with surprising name "Refactoring" in our bugzilla[1], so please put the reported issues into this category. [1] http://netbeans.org/bugzilla/buglist.cgi?product=groovy;component=Refactoring

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• Grub does not show a Windows 8 option after dual boot

  - by skytreader

  So, I've successfully dual-booted my Windows 8 machine with Ubuntu 12.04 . However, I still don't have a convenient method of choosing what OS to load at boot time. After installing Ubuntu, my computer still loads Windows 8 directly. I then added grubx64.efi to the white list of my boot loader. But after that, my machine loads Ubuntu directly without even a shadow of GRUB showing up! I used boot-repair and I got this paste.ubuntu URL: paste.ubuntu.com/1326074. After running boot-repair (and re-white listing the grubx64.efi file), GRUB now shows up but without any Windows 8 option! Lastly, I ran sudo fdisk -l and it gave me this: WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x6396389f Device Boot Start End Blocks Id System /dev/sda1 1 1465149167 732574583+ ee GPT Partition 1 does not start on physical sector boundary. I'm guessing my problem has something to do with the warning from fdisk above but I don't know what to do with it. How do I proceed now?

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• Accessing second hard drive

  - by Jonathan

  Hi, So I recently installed Ubuntu 10.10 64-bit on my computer. I installed it on my 60gb SSD hard drive, and in the installation it never acknowledged the existence of my second hard drive. The hard drive that I keep all my files on, and which I want to make my home folder if I can, is a Western Digital Caviar Black 1TB SATA 6Gb/s 64MB cache (WD1002FAEX). I've read the following: https://help.ubuntu.com/community/Mount but honestly cannot work out how to access the hard drive from my Ubuntu installation. I did have Windows 7 64-bit prior to installing Ubuntu. I have backed up all the files on the hard drive, but if I could just access them straight off that would be super cool. Does anyone know how I can use the second hard drive? Thank you for your help EDIT: The following directories are currently in my /dev/ folder: ati/, block/, bsg/, bus/, char/, cpu/, isk/, input/, mapper/, net/, pktcdvd/, pts/, shm/, snd/, and usb/ EDIT: Result from sudo fdisk -l Disk /dev/sda: 60.0 GB, 60022480896 bytes 255 heads, 63 sectors/track, 7297 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000d2dfd Device Boot Start End Blocks Id System /dev/sda1 * 1 6994 56174592 83 Linux /dev/sda2 6994 7298 2438145 5 Extended /dev/sda5 6994 7298 2438144 82 Linux swap / Solaris

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• Difficulty Mounting Volumes on a Partitioned External HD

  - by Todd

  I'm having a great deal of difficulty with an external hard drive. I'm currently running a dual boot system (XP Service Pack 3 and Ubuntu 11.04 Natty Narwahl) on a Dell Inspiron B120. I'm trying to set up a new 80 GB Hitachi external HD. Using GParted, I formatted the drive and set up the partitions. The partitioning scheme is as follows 10GB NTFS Primary, 2GB Linux-Swap Primary, 50GB FAT32 Primary, 12GB Unallocated. After applying those changes, I went into Disk Utility and the HD appears along with the correct partitions. When I try to mount the volumes for partitions 1 and 3, I get a pop-up stating: Error Mounting Volume An error occurred while performing an operation on "Home" (Partition 3 of HTS548080m9AT00): The daemon is being inhibited. When I try to to check the filesystem I get a pop-up stating: Error Checking filesystem on volume An error occurred while performing an operation on "Home" (Partition 3 of HTS548080m9AT00): The daemon is being inhibited. Throughout the time that I'm attempting to troubleshoot the problem, the external drive light is on and blinking. With my frustration hitting a boiling point, I try to shut down the drive and remove it so that I can plug in a different external HD that works PERFECTLY. However, when I try to shut down and safely remove the drive, I get a pop-up stating: Error Detaching Drive An error occurred while performing an operation on "80GB Hard Disk" (HTS548080m9AT00): The daemon is being inhibited. Can anyone tell me what I'm doing wrong? I'm a newbie and not that skilled with terminal commands, so please dumb it down for me if you request specific command output.

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• Encrypt SSD or not?

  - by JamesBradbury

  My desktop machine is running Ubuntu 12.04 (and will probably stay with it until the next LTS). I've got a new 120GB SSD on the way as my existing 420GB spinning disk. If it makes any difference I'll be dual-booting with Windows 7 across both disks too. I've read some helpful answers here about /home setup and enabling TRIM, which I intend to follow. So most of my /home will be on the SSD, with only photos, videos and music on the spinning disk. The question is, when I reinstall Ubuntu from CD or USB, whether I should encrypt the SSD? Specifically: I'm reading that drive wear isn't much of an issue with modern SSDs as they last decades even if you spam them. Is this true? How big a performance reduction will encrypting cause (I have an i7 Sandybridge, so I guess it can cope)? Is it more important from a security point of view to encrypt an SSD? I think I read somewhere that it may be hard to reliably wipe data. By all means answer even if you only know about one of those things.

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• Deleting Unused Swaps Partions

  - by Nikita Kononov

  Good evening everyone , I got a little issue with Swap Partitions. Due to some issues after installing Ubuntu first time, I reinstalled it and now I have 3 Swaps. Here is sudo fdisk -l result Disk /dev/sda: 750.2 GB, 750156374016 bytes 255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0xaa9693fe Device Boot Start End Blocks Id System /dev/sda1 2048 52430847 26214400 1c Hidden W95 FAT32 (LBA) /dev/sda2 * 52430848 540677076 244123114+ 7 HPFS/NTFS/exFAT /dev/sda3 540678142 1465147391 462234625 5 Extended Partition 3 does not start on physical sector boundary. /dev/sda5 1452750848 1465147391 6198272 82 Linux swap / Solaris /dev/sda6 1440352256 1452742655 6195200 82 Linux swap / Solaris /dev/sda7 540678144 1427951615 443636736 83 Linux /dev/sda8 1427953664 1440339967 6193152 82 Linux swap / Solaris So Swaps in /dev/sda5 and /dev/sda6 are no longer in use as far as I understand and thus I was planning to delete them, however faced a problem. What I did is download and burn Gparted Live CD and boot it up, tried to delete those partitions but I have no idea how to add 12GB unallocated memory to the existing OS partition in this case to /dev/sda7 Is there anyway I can delete 2 swaps and extend unallocated memory to /dev/sda7 partion? Thank you in advance!

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• SQL language drawbacks, The Third Manifesto

  - by David Portabella

  Sometime ago I read about SQL language drawbacks (the basic language specification, not vendor specific), and one of the drawbacks was that the language does not allow to create a set of tuples that don't come from a table. For instance, SELECT firstName, lastName from people; this creates a set of tuples coming from the table people. Now, if I don't have this table people, and I want to return a constant, I'd need something like this to return a set of two tuples (this would not require to have a table): SELECT VALUES('james', 'dean'), ('tom', 'cruisse'); Why I would need that? Because of the same reasons that we can define constants (not only basic types, but objects and arrays also) in any advanced programming language. Workarounds, Yes, I could create a temporal table, fill the data, and SELECT from that table. This is a hack, to overcome the drawbacks of the poor SQL language. I think that I read about this somewhere in "The Third Manifesto", but I don't find the paragraph/example talking about this concrete drawback anymore. Do you know a reference about it?

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• Regulation of the software industry

  - by Flexo

  Every few years someone proposes tighter regulation for the software industry. This IEEE article has been getting some attention lately on the subject. If software engineers who write programs for systems that expose the public to physical or financial risk knew they would be tested on their competence, the thinking goes, it would reduce the flaws and failures in code—and maybe save a few lives in the bargain. I'm skeptical about the value and merit of this. To my mind it looks like a land grab by those that proposed it. The quote that clinches that for me is: The exam will test for basic knowledge, not mastery of subject matter because the big failures (e.g. THERAC-25) seem to be complex, subtle issues that "basic knowledge" would never be sufficient to prevent. Ignoring any local issues (such as existing protections of the title Engineer in some jurisdictions): The aims are noble - avoid the quacks/charlatans1 and make that distinction more obvious to those that buy their software. Can tighter regulation of the software industry ever achieve it's original goal? 1 Exactly as regulation of the medical profession was intended to do.

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• virt-install says name is in use, but virsh list --all is empty. Where is virt-install finding this name?

  - by Jay _silly_evarlast_ Wren

  virt-install says name is in use, but virsh list --all says there is nothing. jrwren@delays:{%22}~ $ virt-install -d -n android -r 512 --disk android.qcow2 -s 4 -c /d/cd\ images/android-x86-2.2-generic.iso --vnc --noautoconsole [Thu, 05 Jul 2012 16:57:19 virt-install 23170] DEBUG (cli:220) Launched with command line: /usr/bin/virt-install -d -n android -r 512 --disk android.qcow2 -s 4 -c /d/cd images/android-x86-2.2-generic.iso --vnc --noautoconsole [Thu, 05 Jul 2012 16:57:19 virt-install 23170] DEBUG (cli:326) Requesting libvirt URI default [Thu, 05 Jul 2012 16:57:19 virt-install 23170] DEBUG (cli:328) Received libvirt URI qemu:///session [Thu, 05 Jul 2012 16:57:20 virt-install 23170] DEBUG (virt-install:259) Requesting virt method 'default', hv type 'default'. [Thu, 05 Jul 2012 16:57:20 virt-install 23170] DEBUG (virt-install:469) Received virt method 'hvm' [Thu, 05 Jul 2012 16:57:20 virt-install 23170] DEBUG (virt-install:470) Hypervisor name is 'kvm' [Thu, 05 Jul 2012 16:57:20 virt-install 23170] DEBUG (cli:950) --graphics compat generated: vnc [Thu, 05 Jul 2012 16:57:20 virt-install 23170] ERROR (cli:597) Guest name 'android' is already in use. (venv)jrwren@delays:{%22}~ $ sudo virsh -c qemu:///system list --all Id Name State ---------------------------------- Where is virt-install finding this name? edit: I should mention that LIBVIRT_DEFAULT_URI is not set.

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• How to change partitioning - may involve conversion of a partition from primary to extended

  - by george_k

  I am having trouble thinking through how I can achieve my partitioning goals. Now my partitions are: sda1 (winA) (primary) sda2 (winB) (primary) sda3 (/ for ubuntu) (primary) What I want to migrate into is (obviously partition numbers need not be exactly like that) sda1 (winA) (primary) sda2 (winB) (primary) sda3 (/boot) (primary) sda4 - extended which will contain sda5 (/home) sda6 (/ for ubuntu) sda7 (swap) I know I may be asking too much, but what would a way to do it? One way I have thought is Create a new primary partition for /boot and split it from the root partition into the new one. It shouldn't be too hard. Then the disk will have 4 primary partitions. Somehow convert the root ubuntu partition from primary to extended. Split that last partition in 3 extended partitions (root, /home, swap) and split the contents there. I am obviously stuck on the 2nd part. Another way could be (maybe easier): Create an extended partition (or two) Split /home there Somehow move everything except /boot to the extended partition. This way /boot will stay on the primary partition that exists now, and will be shrunk as needed, and everything else will end up to the extended partitions. This may sound better, but I'm not too sure how to do the 3rd part. Some details: The disk is almost empty, so I have space to move things around in it, shrink the ubuntu partition etc. I don't want to touch the windows partitions in any way. Reinstallation is not an option. Also using a different partitioning scheme with fewer partitions is not an option (for example not having a separate /boot) Any ideas?

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• Heightmap and Textures

  - by Robert

  Im trying to find the "best way" to apply a texture to a heightmap with opengl 3.x. Its really hard to find something on google because tutorials are olds and they're all using different methods, im really lost and i dont know what to use at all. Here is my code that generates the heightmap (its basic) float[] vertexes = null; float[] textureCoords = null; for(int x = 0; x < this.m_size.width; x++) { for(int y = 0; y < this.m_size.height; y++) { vertexes ~= [x, 1.0f, y]; textureCoords ~= [cast(float)x / 50, cast(float)y / 50]; } } As you can see, i dont know how to apply the texture at all (i was using / 50 for my tests). Result of that code : I would like to have something very basic like : (you can find more pics in his blog) Edit : my texture size is 1024x1024.

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• USB and CD data cannot be read or mounted in 12.10

  - by aravind4j

  I'm using Ubuntu 12.10. I wrote a data disk using Brasero Disk Burner, but the system cannot read the CD. I tried to write the same data into my HP v220w pen drive but now there is an error in that too. It shows the following: Error mounting /dev/sdb at /media/aravind4j/Aravind4j: Command-line `mount -t "ntfs" -o "uhelper=udisks2,nodev,nosuid,uid=1000,gid=1000,dmask=0077,fmask=0177" "/dev/sdb" "/media/aravind4j/Aravind4j"' exited with non-zero exit status 13: $MFTMirr does not match $MFT (record 0). Failed to mount '/dev/sdb': Input/output error NTFS is either inconsistent, or there is a hardware fault, or it's a SoftRAID/FakeRAID hardware. In the first case run chkdsk /f on Windows then reboot into Windows twice. The usage of the /f parameter is very important! If the device is a SoftRAID/FakeRAID then first activate it and mount a different device under the /dev/mapper/ directory, (e.g. /dev/mapper/nvidia_eahaabcc1). Please see the 'dmraid' documentation for more details. (udisks-error-quark, 0) I used a NTFS file system for the pen drive as you can recognize from the above statement. I would like to recover the files so please help me recover the files without formatting the drive.

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• Botting from a stick drive

  - by Zap

  Am trying to boot from a usb stick. Have carefully followed the instructions at the following link and successfully downloaded and installed version Ubuntu 12.04 desk top: http://www.ubuntu.com/download/help/create-a-usb-stick-on-windows I used the Universal-USB-Installer-1.9.0.2 as instructed and choose the "Ubuntu 12.04 desk top" option, after downloading the respective iso/zip file onto my Dell laptop from the Ubuntu site. Also modified my bios to select the usb first as boot drive instead of hard drive. Also, turned off bit blocker on my laptop and usb stick. Usb stick has the setting of "Automatically unlock this drive on this computer". When i reboot my laptop, it first boots into a black screen (i assume is the bios), but prompts saying "Remove disks or other media. Press any key to start". I press any key and regardless the laptop boots up to windows. Hence, it appears that the boot process is checking the USB first before going to the hard drive to look for it's boot disk and starting Windows 7. Is it that the USB stick is not correctly configured with Ubuntu as a boot disk? Is there anything else that i need to do besides the instructions at the following link? http://www.ubuntu.com/download/help/create-a-usb-stick-on-windows How can I ensure that USB boot stick is configured correctly? After running the Universal-USB-Installer-1.9.0.2 to "install" Ubuntu, is there additional configuration/installation steps? What is the first file that the bios would look for on this USB drive? Is this configured somewhere in the bios, or would it just look for an grub file or /boot dir? The only message i get when booting is "Remove disks or other media. Press any key to start". Any and all help would be much appreciated.. Thanks ... :)

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• Ask the Readers: How Do You Monitor Your Computer?

  - by Jason Fitzpatrick

  Beneath the shiny case of your computer and GUI of your operating system there’s a lot–CPU utilization, memory access, and disk space consumption to name a few things–you can keep an eye on. How do you keep an eye on resource utilization and more on your computer? Image available as wallpaper here. Whether you’re carefully managing a small pool of RAM, making sure your abundant apps don’t bog down your processor, or you just like having an intimate view of what’s going on in the guts of your computer, we want to hear all about the tools you use to do it. How and why do you monitor your computer? From disk use to case temps, any kind of monitoring is fair game. Sound off in the comments with the how and why of your monitoring arrangement and then be sure to stop back in on Friday for the What You Said roundup to see what tricks and tools your fellow readers are using to keep an eye on their hardware. HTG Explains: How Antivirus Software Works HTG Explains: Why Deleted Files Can Be Recovered and How You Can Prevent It HTG Explains: What Are the Sys Rq, Scroll Lock, and Pause/Break Keys on My Keyboard?

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• "The daemon is being inhibited" error message when mounting volumes on a partitioned external HD [closed]

  - by Todd

  I'm having a great deal of difficulty with an external hard drive. I'm currently running a dual boot system (XP Service Pack 3 and Ubuntu 11.04 Natty Narwahl) on a Dell Inspiron B120. I'm trying to set up a new 80 GB Hitachi external HD. Using GParted, I formatted the drive and set up the partitions. The partitioning scheme is as follows 10GB NTFS Primary, 2GB Linux-Swap Primary, 50GB FAT32 Primary, 12GB Unallocated. After applying those changes, I went into Disk Utility and the HD appears along with the correct partitions. When I try to mount the volumes for partitions 1 and 3, I get a pop-up stating: Error Mounting Volume An error occurred while performing an operation on "Home" (Partition 3 of HTS548080m9AT00): The daemon is being inhibited. When I try to to check the filesystem I get a pop-up stating: Error Checking filesystem on volume An error occurred while performing an operation on "Home" (Partition 3 of HTS548080m9AT00): The daemon is being inhibited. Throughout the time that I'm attempting to troubleshoot the problem, the external drive light is on and blinking. With my frustration hitting a boiling point, I try to shut down the drive and remove it so that I can plug in a different external HD that works PERFECTLY. However, when I try to shut down and safely remove the drive, I get a pop-up stating: Error Detaching Drive An error occurred while performing an operation on "80GB Hard Disk" (HTS548080m9AT00): The daemon is being inhibited. Can anyone tell me what I'm doing wrong? I'm a newbie and not that skilled with terminal commands, so please dumb it down for me if you request specific command output.

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• Cannot Create Bootable USB Drive from .iso file

  - by tarabyte

  I've tried formatting the flash drive as FAT as well as Mac OS journaled through diskutility but still cannot successfully create a bootable drive. I'm following the directions here exactly: http://www.ubuntu.com/download/help/create-a-usb-stick-on-mac-osx Environment: Macbook Pro trying to create a bootable flash drive for a Macbook Pro. 8GB flash drive. Tested ubuntu-12.04.1 as well as ubuntu 12.20 .iso 64-bit downloads. Nothing to repair in disk utility for this hard drive. Every time I finish step 8 of the tutorial I get "file system not recognized" with the options to "initialize" meaning to reformat my drive, "ignore" or "eject." When I try to re-inspect the flash drive in disk utility after plugging it back in I see that it has some error when I try to verify it but the "repair" button is disabled. I just want to boot to ubuntu when my mac first starts up. Oh the pain. http://lifehacker.com/5934942/how-to-dual-boot-linux-on-your-mac-and-take-back-your-powerhouse-apple-hardware "linux is free insomuch as your time is worthless" - old wise man

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• Nifty default controls prevent the rest of my game from rendering

  - by zergylord

  I've been trying to add a basic HUD to my 2D LWJGL game using nifty gui, and while I've been successful in rendering panels and static text on top of the game, using the built-in nifty controls (e.g. an editable text field) causes the rest of my game to not render. The strange part is that I don't even have to render the gui control, merely declaring it appears to cause this problem. I'm truly lost here, so even the vaguest glimmer of hope would be appreciated :-) Some code showing the basic layout of the problem: display setup: // load default styles nifty.loadStyleFile("nifty-default-styles.xml"); // load standard controls nifty.loadControlFile("nifty-default-controls.xml"); screen = new ScreenBuilder("start") {{ layer(new LayerBuilder("baseLayer") {{ childLayoutHorizontal(); //next line causes the problem control(new TextFieldBuilder("input","asdf") {{ width("200px"); }}); }}); }}.build(nifty); nifty.gotoScreen("start"); rendering glMatrixMode(GL_PROJECTION); glLoadIdentity(); GLU.gluOrtho2D(0f,WINDOW_DIMENSIONS[0],WINDOW_DIMENSIONS[1],0f); //I can remove the 2 nifty lines, and the game still won't render nifty.render(true); nifty.update(); glMatrixMode(GL_PROJECTION); glLoadIdentity(); GLU.gluOrtho2D(0f,(float)VIEWPORT_DIMENSIONS[0],0f,(float)VIEWPORT_DIMENSIONS[1]); glTranslatef(translation[0],translation[1],0); for (Bubble bubble:bubbles){ bubble.draw(); } for (Wall wall:walls){ wall.draw(); } for(Missile missile:missiles){ missile.draw(); } for(Mob mob:mobs){ mob.draw(); } agent.draw();

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