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  • Resources on learning to program in machine code?

    - by AceofSpades
    I'm a student, fresh into programming and loving it, from Java to C++ and down to C. I moved backwards to the barebones and thought to go further down to Assembly. But, to my surprise, a lot of people said it's not as fast as C and there is no use. They suggested learning either how to program a kernel or writing a C compiler. My dream is to learn to program in binary (machine code) or maybe program bare metal (program micro-controller physically) or write bios or boot loaders or something of that nature. The only possible thing I heard after so much research is that a hex editor is the closest thing to machine language I could find in this age and era. Are there other things I'm unaware of? Are there any resources to learn to program in machine code? Preferably on a 8-bit micro-controller/microprocessor. This question is similar to mine, but I'm interested in practical learning first and then understanding the theory.

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  • Can't Enter Password in Recovery Mode

    - by Mike Lentini
    When I go into recovery mode to get to the command line, I enter "telinit 3" to drop out of root. This works on my desktop, but on my laptop it asks for my username and password, then I hit enter and the first letter of my password appears and it doesn't log me in. It then proceeds to ask me for my username and password again, and the issue continues. Am I doing something wrong? Is this a known issue with a solution? EDIT: Worked around this by going into /etc/default/grub and setting it to boot in text mode. Still would like a solution for this though.

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  • Why are the colors worse on Ubuntu 12.04 than on Windows 7 on my Sony Vaio E-Series?

    - by Simon Hoare
    The colours look "lacking" and ever slightly blueish and rather washed-out and lacking in dimension. Graphics are ok - this page for example looks fine - but if I view something like a news site with high quality photos, the experience is not optimal and is noticeably inferior to Windows 7. Oddly, when I install Ubuntu as a VM on VirtualBox in Windows, the colours look as I expect them to. It's only on my dual-boot version of Ubuntu that they look wrong (not Wubi, although a previous Wubi-based installation had the same problem). Now, I have the proprietary ATI driver and I can use amdcccle to get the colours closer to what they should be, but I can't seem to do anything about colour depth. The depth settings in Xorg are all 24. I tried changing all three mentions of 24 to 32 but was forced into safety mode. Fortunately, I remembered where I'd been tinkering and got the file set back to 24.

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  • Remove kubuntu-desktop from ubuntu 12.04 [closed]

    - by Meijuh
    Possible Duplicate: How to completely remove desktop? So, I thought I managed to remove KDE completely, but apparently that did not work at all, because every KDE application is back, including the KDE splash screen. I ran sudo apt-get autoremove --purge kubuntu-desktop Then I ran sudo apt-get install --reinstall ubuntu-desktop Then I ran sudo sudo update-alternatives --config default.plymouth Then I rebooted and everything seemed to be the original ubuntu-desktop (without the kde splash screen and other KDE applications). But now, one week later I still boot to ubuntu-desktop, but like I said, the kde splash screen and applications are all back. How should I remove kubuntu-desktop?

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  • Sound plays from laptop speakers only even when headphones are connected

    - by Ankush N Nayak
    I'm using a Dell Vostro 1014 laptop with Ubuntu 11.10. From the time I had Ubuntu 9.04, sound comes from the laptop speakers only even when I plug in earphones or external speakers. Also, if an external microphone plugged in, it does not work. Dell even replaced my motherboard to check for hardware issues but the problem persists. So it is definitely not a hardware issue. The sound plays perfectly through the headphones in the pre-boot diagnostics. So I figure, this must be a problem with Ubuntu not recognizing my sound card. Please try to give a solution for this problem.

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  • Get Real Multitasking on Android With These 8 Floating Apps

    - by Chris Hoffman
    Android has decent multitasking, but the missing piece of the puzzle is the ability to have multiple apps on-screen at the same time – particularly useful on a larger tablet. Floating apps fill this need. Floating apps function as always-on-top windows, allowing you to watch videos, browse the web, take notes, or do other things while using another app. They demonstrate how Android’s interface is more flexible than iOS and the Modern UI in Windows. Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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  • Ubuntu 12.04 - Unable to change brightness

    - by Raymond Standen
    So, as a number of users seem to be experiencing, I am unable to change brightness on my laptop. Using the Brightness and Lock in settings, the slider moves but brightness does not adjust. The fn keys work for volume but not for brightness. I have updated my drivers and installed all updates, however the brightness is still at maximum. I have heard that opening sudo gedit /etc/x11/xorg.conf and entering Option "RegistryDwords" "EnableBrightnessControl=1" can fix this, however when opening xorg.conf through Terminal I am greeted with a blank document... Not very reassuring. Toshiba L750 Laptop Nvidia Graphics Card Dual boot with Windows

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  • Ubuntu on a USB

    - by Sander de Lange
    I was just wondering if anyone had a good experience with Ubuntu on a flash drive... I'm installing it right now. I formatted my 16GB flash drive to Ext2 because the default file system is ext4 but that one is journaled and USB flash drives do not like journaling. I want to use this to learn Java and Ubuntu seems to be a great OS for this. I (obviously) have USB 2.0 ports where I will put the USB in. How is the boot time of Ubuntu on a USB?

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  • no such partition, grub rescue

    - by David
    I am currently dual booting Win7 and Ubuntu. I created a new partition, on my c drive, to install windows 8 on (i did not want to do the upgrade). I inserted the windows 8 cd and restarted my computer. no such partition/ grub rescue is all that comes up now. I loaded ubuntu from disk and did boot-repair. It did not solve my problem but I got the following output Please let me know if anyone can fix this. I am lost.

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  • Installing Ubuntu 12 on SATA III drive

    - by Jared
    I am trying to install Ubuntu 12.04 on a SATA III drive however the installer will not recognize my drive in the guided (dual-boot) install. I have changed the controller from IDE to AHCI to no avail, the install still will only recognize my very small second drive that is plugged into a SATA II port. The thing is, the unguided install sees this drive just fine, I just am not sure enough of what I'm doing to feel safe installing via this method. Is there a fix for this beyond plugging my drive into a SATA II port? I really would like to avoid this because of my terrible cable management skills it would be a huge pain to switch it over.

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  • Custom Silent HTPC Uses Entire Case as a Heatsink

    - by Jason Fitzpatrick
    This silent media center PC dissipates heat in a rather clever way; the entire back of the case is one giant heatsink. Courtesy of computer enthusiast and tinker DeFex, the build isn’t just silent but quite eye catching too. He used a combination of one massive heatsink, custom brackets, acrylic, and bicycle spokes to create a sleek case that looks as much like a computer-inspired work of art as it does a media center computer. Hit up the link below to check out the build gallery and see how he mated the CPU to the heatsink-body with a custom milled aluminum bridge. Heatsink HTPC [via Hack A Day] Secure Yourself by Using Two-Step Verification on These 16 Web Services How to Fix a Stuck Pixel on an LCD Monitor How to Factory Reset Your Android Phone or Tablet When It Won’t Boot

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  • Ubuntu Server 12 HD full

    - by julio
    I have a server with Ubuntu Server 12, today it stops some services and I found some comments about full disk, so I made a df -h S.files Size Used Disp Use% /dev/mapper/ubuntu-root 455G 434G 0 100% / udev 1,7G 4,0K 1,7G 1% /dev tmpfs 689M 4,2M 685M 1% /run none 5,0M 0 5,0M 0% /run/lock none 1,7G 0 1,7G 0% /run/shm /dev/sda1 228M 51M 166M 24% /boot overflow 1,0M 0 1,0M 0% /tmp Then I tried to delete some files but I made it from a windows remote computer just right clic and "delete" option on files, but HD still full. Is in Ubuntu Server any Trash file or what could be happeing?

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  • Battery discharges while computer is off

    - by Nuno Finote
    I bought a hp 15-r003np 2 weeks ago and installed ubuntu 14.04 LTS with dual boot (to windows 8). When i shutdown ubuntu, in the next day battery has 85% of charge, despite the computer shutdown. If i power off in windows battery charge is 100% in the next day. Does anyone have noticed the same problem? I think the network adapter is not on wol mode, seen via windows network config properties. I need help to solve this problem... (it's not right to work around restarting to windows to do the shutdown properly...)

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  • Trouble after Ubuntu 12.10 upgrade

    - by highsciguy
    Over night I tried to upgrade to (k)ubuntu 12.10. Unfortunately kdm (neither lightdm) doesn't show up after boot. I found several posts describing errors due to the migration from kdm to lightdm. Some sugest reinstallation of kdm. Therefore I logged into a shell and tried to install it using apt-get. However it turned out that network is not available. ifconfig showes that only the loopback device lo is available. What can I do to get lan or wlan network working on the commandline? I relized that grub still runs the old tuxonice kernel which I installed from ppa. Is it possible that the installation didn't finish and left me in an inkonsistent state in which the kernel version does not match the modules? How can I proceed the installation from the downloaded packages?

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  • unable to install ubuntu

    - by Aditya
    I am working on my HP laptop with Windows7. I am not able to install ubuntu (making it dual boot). I have made my usb stick bootable by using UNETBOOTIN. Following are the steps I took to install ubuntu: Bios device options-my_usbstick-default. after this nothing else happens. just a blank screen persists until I have to eventually shut down my system. I assure that the iso file used is good as with the same procedure followed my friend was able to install ubuntu in his DELL system. Please help me out with this one.

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  • Network Manager kicks off abruptly

    - by Vijay Selvaraj
    I have installed Ubuntu 10.10 and trying to connect with my ADSL Wireless broadband internet modem using Linksys WUSB600N receiver. The good news is the OS is able to detect my wifi network and I am able to hook to network over WPA authentication with basic settings. But the network goes off abruptly and never connects again until I reboot the machine. I have Windows 7 as dual boot on my machine. The same adapter works perfectly with Windows 7 but not in Ubuntu. Is there anything in need to tweak to make things working or do I need to try any other better network manager on Ubuntu?

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  • Ubuntu 12.04 LTS Realtek RTL8192E Problems

    - by Logan
    My wifi is not working. I have tried ndiswrapper with the XP driver but that still did not work. Please explain to me in layman's terms. I can run commands so if you tell me exactly what to put, i will put it. Basically, ubuntu is not showing a wireless networks option and when I ran some command yesterday it said the driver was UNCLAIMED. Please help. This is a wintec card with realtek rtl8192E chip on it. It is a desktop computer. On a 20gb partition, other 60gb is for windows(yeah its an old desktop). Use windows installer to install ubuntu(this is one of the dell desktops that wont boot ubuntu from disk). So any help is appreciated and I would like to get this done THIS weekend.

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  • Why does my touchpad fail on resume from standby?

    - by pst007x
    On resume touchpad disables and a reboot is needed to re-activate. Macbook Pro 6.1 Ubuntu 11.10 MAC 64bit Suspend - ok Suspend Resume - ok However, on resume in the loggin screen my touchpad works, but after I enter my password and return to the desktop the touchpad fails. A usb mouse still works fine. I have to re-boot in order to re-enable toe touchpad. This was not an issue when I had Ubuntu 10.10 32bit installed. The install was a fresh install. The bcm5974 driver will not install, says codependency errors. I manually try to install all dependencies and I get this error: E: hid-dkms: subprocess installed post-installation script returned error exit status 10 E: bcm5974-dkms: dependency problems - leaving unconfigured Thanks

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  • Some websites are not opening in any web browser (firefox/chrome). What should I do? [closed]

    - by Jamal
    Some websites are not opening in my system. I am using Ubuntu 12.10. Earlier, when I was using Ubuntu 10.10,11.10 there was no such issue. The problem was started in ubuntu 12.04, but it remained the same even after formatting and installing ubuntu 12.10. I have tried Firefox as well as Chromium and I am sure the issue is not with the browser. same websites are opening perfectly with Windows. Google, Twitter and Ubuntu related websites are running perfect. Other websites like www.downrightnow.com, easy-mantra.com, facebook.com, sourceforge.net are not opening. Installed dual boot with win xp. Ubuntu 12.10 is 64 bit. Processor Intel core i3, RAM 4GB. $ cat /etc/resolv.conf <-- Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8) -- DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN -- output --> nameserver 127.0.1.1

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  • Set nomodeset in usb installation (efi loader with iso)

    - by Garrett
    I'm working with the studyblast solution (http://studyblast.wordpress.com/2011/08/14/guide-mac-os-x-lion-how-to-boot-a-linux-live-system-from-a-usb-drive-how-to-update-any-ocz-ssds-firmware/) to creating a live usb for osx. I managed to get Ubuntu booted but the screen looks like a corrupt/glitch image. I can just about make out the clock on the bottom right and a few icons. I've been told that this is an easy fix and that nomodeset needs to be set for the graphics card but all the solutions i find are for a hard drive installed Ubuntu where you can cd in and edit the grub file - how do you do this is it's in an iso? Thanks Garrett

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  • Why doesn't LightDM always doesn't start under XEN

    - by DaedalusFall
    When I use XEN on Ubuntu (12.10), I have a problem that lightdm sometimes doesn't start when I boot up, I have to log in on the TTY and use sudo service lightdm restart, sometimes several times. Some of the time I get a mouse cursor and a blinking underscore in the top left of the (otherwise black) screen, but after restarting lightdm a few times it eventually comes up properly. I've tried this with XEN from the repos (version 4.1), XEN 4.2 built from source, an NVIDIA card and a radeon card (not using fglrx, which I can't seem to make work under XEN), the results are more or less the same. I can't see anything obvious in my Xorg.log, but I'm not really sure what to look for. Anyone had similar problems or luck getting xen working? Thanks in advance.

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  • Cannot install vim

    - by Max Popp
    I am running ubuntu 11.10, as xubuntu, in an amd64 pc, configured as dual boot with win7 . I tried installing vim with this: sudo apt-get install vim I got these error message: "The following packages have unmet dependencies: vim : Depends: vim-common (= 2:7.3.154+hg~74503f6ee649-2ubuntu2) but 2:7.3.154+hg~74503f6ee649-2ubuntu3 is to be installed E: Unable to correct problems, you have held broken packages." I only have a very faint idea of what the problem is, and none whatsoever on how to correct this. Hope you guys can help. Thanks

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  • Digital Audio Output light on on MacBook Pro

    - by Emerson Hsieh
    I don't know if this problem happened when I installed Ubuntu before. Recently I noticed that when I boot Ubuntu, the Digital Audio Output light automatically switches on. Digital Audio Output light on means "Something wrong in the headphone port". Although my headphone is working in Ubuntu. I've heard that the headphone contains some magical "switch" that will fix the light problem. So I poked the headphone port with chopsticks, pens, paper clips, even my finger, and the Digital Audio Output light still stays on. I don't have this problem in OSX. How do I switch the light off?

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  • Change login screen to gnome-shell login

    - by Dr_Bunsen
    I was just goofing around in a vm to test what would happen if I purgen unity: sudo apt-get remove --purge unity* I found that I get an startup error, but when I proceed, I got this awesome login screen: It has an sexy effect and is just the gnome style my whole pc has got. So can any one please tell me how I change the default login screen program without having to bother clicking "fix this error" on every boot? Thanks in advance. [edit] This is the error I get, and the only option that works is the, run in low settings for one session.

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  • Ubuntu only recognizes one partition from multi partitions SD card

    - by Jay Ngo
    Hello everybody, I split my sd card into 2 partitions. When i use usb-card-reader to read my sd card, only the one partition shows up on the screen, the other doesn't. I have run the command "sudo fdisk -l" and the result is the same, only one partition is recognized. But i do believe both partitions of my sd card work fine, because i still can boot my single-board computer with that sd card and run some programms, which are inside that unreadable partition. How can i access both partitions of my sd card? Does anyone know how to solve this kind of problem? I really appreciate your help.

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