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  • How can I disable the prefetch cache?

    - by Oli
    I run a few Ubuntu servers that have a load of django sites running on them. The sites and the httpd start at boot and after that (apart from me SSHing in to update it or using bzr to update websites) nothing else gets run on it. At the moment over half the ram is allocated as cache. This isn't a problem because cache usually makes space or a little bit of it slips into swap (again, this doesn't really bother me) but I don't see the need for it. Is there a quick way to disable the cache? This is more of an experiment than anything else so it would be handy to know how to turn it back on again.

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  • Evoluent Vertical Mouse - Re-mapping Buttons?

    - by Paul
    I have the Evoluent Vertical Mouse at work and at home. One is wired, the other wireless. Ubuntu maps their buttons differently and it makes me crazy when I switch locations. I use 12.10, but same has applied to every Ubuntu version since 9.10. The wired mouse is as desired: top finger button is left-click, scroll wheel is middle click and scroll, middle finger button is a right-click. On the wireless version, bottom finger button is mapped to right-click and the middle finger button is center-click. I tried tinkering with these instructions, but wound up unable to boot to GUI... had to delete the .conf file to recover: http://denishaine.wordpress.com/2011/12/01/evoluent-mouse-with-ubuntu-11-04-and-11-10/ Help?

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  • How to keep specific old kernel on my next kernel upgrade?

    - by tvrtko
    I just updated my Ubuntu 14.04 and got a new kernel. This new kernel is not working properly for me so I booted the previous version. Let's call this good old working version "3.13.0-24.47". Now, I want to keep this "3.13.0-24.47" version until I decide to delete it manually. I want to be able to upgrade my kernel each time there is a new version in hope of getting the one which works again. Until then, I want to use the "3.13.0-24.47". I'm afraid that next update will delete my "3.13.0-24.47" version because there are only two kernel versions available at a given time on my system (/boot).

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  • Asus 1001P freezes after chaging network settings

    - by auntiquarian
    I'm running Ubuntu 11.04 on a Asus PC 1001P in a dual boot environment with XP. All has been running fine for several weeks, but: I've just changed ISP (from Tiscali to BT), and had already sorted out connection, registration, etc. on a Dell laptop. On the Asus I went into Ubuntu to alter the wireless network details (i.e. selected the new network, and entered the password). Ubuntu immediately started running slowly, and after rebooting it now freezes when it gets to the Ubuntu logo and gets no further. Please help, lovely Ubuntu experts.

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  • DIY Touch Screen Mod Makes Regular Gloves Smartphone-friendly

    - by Jason Fitzpatrick
    Smartphone-friendly winter gloves are expensive (and often ugly). Skip shelling out for store-bought gloves when, armed with a needle and thread, you can turn any gloves into smartphone-friendly ones. Over at Popular Science, Taylor Kubota shares the simple trick: 1. Order silver-plated nylon thread (silver conducts electricity). This can be difficult to find in stores, but major online retailers carry it. 2. Pick a pair of gloves to modify. Although leather works, it’s harder to push a needle through. 3. Stitch the figure of a star or other solid shape onto the glove’s index finger with the thread, making sure it will contact both the touchscreen and your skin. Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus?

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  • Ubuntu "Server" but with a better terminal?

    - by RiMMER
    I'm currently using Ubuntu Server installed in VirtualBox for running various server services. The only drawback it posses for me is that I cannot use mouse in the terminal and select/copy/paste stuff. What would be an alternative in this situation to get a better terminal? I guess Ubuntu Server itself doesn't support mouse, so I'd have to go for Ubuntu Desktop, but it seems like a huge waste of resources to run Unity/Gnome3 in VirtualBox only to have a terminal. So then I'm wondering whether Xubuntu/Lubuntu would be suitable alternatives, although they still take a lot of time to boot up, etc. Any ideas how to solve this scenario?

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  • Only sdb shows up when installing 12.04 on new Dell inspiron 14z

    - by Jan Korpegård
    I got my brand new Dell Inspiron 14z yesterday, but failed to install Ubuntu. I can boot from a USB stick, and it works well. When trying to install, I confirm that the laptop is connected to the internet etc (as in the 2nd picture in the installation guide: How do I install Ubuntu?). When pressing "Continue" I do not get the question on installation type (alongside/replace/something else). Instead I get a window where I can select partitions: // Picture removed due to low reputation... The problem is that I can only select sdb in the drop drop down box, and I can do do nothing with sdb (like adding partitions etc). The main disk (sda) is partitioned using Gparted the following way: // Picture removed due to low reputation As far as I understand from other threads on askubuntu, this should work... What can I do to install Ubuntu alongside with Windows 7?

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  • Not enough space left in the hard drive. How to proceed?

    - by jimbobjgr
    Where do I begin... I can hardly do anything on Ubuntu 12.04. I am very close to removing and returning to Windows. First I could not load it because the graphics appeared to be running low but somehow that stopped happening and I could log on. Now I can not download anything or I get this message Cannot write: No space left on device. I tried trouble shooting this issue but every time I try and fix the problem I am blocked by this message E: Write error - write (28: No space left on device) E: Can't mmap an empty file E: Failed to truncate file - ftruncate (9: Bad file descriptor) E: The package lists or status file could not be parsed or opened. $ OLD=$(ls -tr /boot/vmlinuz-* | head -n -2 | cut -d- -f2- | awk '{print "linux-image-" $0}') Ubuntu is also running incredibly slow and I cant get anything done! Please help this is driving me mad!

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  • I can't get a native resolution of 1920x1080 on 11.10 (AOC f22 on a Nvidia Geforce GTS 450)

    - by Mikeeeee
    I have a problem were the highest resolution I can get is 1360x769, this is a 22 inch LCD monitor with a native resolution of 1920x1080_60 I have tried numerous drivers but nothing changed I tried editing the xorg.conf scipt with no success (I am a noob with linux though). Running many commands in terminal witch I got from people with similar problems only gives me errors like "Failed to get size of gamma for output default. I get edid checksum is invalid error on boot down also. I think there maybe a communication problem between my screens EDID and ubuntu although xp and windows 7 detect my screen without any errors and automatically set native resolution. also when I am installing ubuntu I get a horrible screen flashing every few seconds until I have installed the nvidia driver. pc specks if it helps x64 os, mainboard N68PV-GS, 4 gig ram, AMD Phenom(tm) 9350e Quad-Core Processor × 4, Nvidia Geforce gts450 512mb, hard drives set up in a onboard nvidia raid array striped. realy need to get a better resolution, 1360x769 does not look nice on a 22 inch screen. ty

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  • Ubuntu 13.10 - Black screen after logging in after installing nVidia drivers

    - by Javacow
    I recently installed Ubuntu 13.10 in a dual-boot with Windows 7, so I'm still quite new to using Linux. Most things were working fine, and I could log in normally (apart from the first login after install, which spent about 2 minutes on a black screen before going to the desktop). I installed the restricted Nvidia drivers with the command: sudo apt-get install nvidia-current Since then, after I enter my password and log in (the login screen itself works perfectly), I get a black screen with the cursor and nothing happens from that point onwards. Basically, what I would like to know is how to get back to the normal Ubuntu desktop and (hopefully) still be able to use Nvidia drivers.

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  • Ubuntu 12.04 keeps rebooting after changing video settings

    - by ScottJShea
    In a pinch I had to install Ubuntu 12.04 on an HP Pavilion g6. I was not fond of the 1024 x 7678 resolution so after investigating and finding I had the intel chipset I set the below in the grub file: GRUB_GFXMODE=1366x768x32 GRUB_GFXPAYLOAD_LINUX=1366x768x32 This did not work. The system just keeps rebooting as nauseum. I powered down, inserted my Ubuntu Install USB, powered up, edited the Grub file on the disk (made sure it was the disk and not the Grub for the USB stick). Powered off and tried booting up again. Same thing. So: As a noob am I missing something in the boot to allow me into a recovery mode? (I cannot seem to get to the Grub menu) If not is there a way I can recover from this? UPDATE: Holding down the shift key after BIOS gets "GRUB Loading..." and then a reboot

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  • two windows loader in grub

    - by Lorenzo
    i'm facing a strange problem about which - googling- i didn't find any solution. This is the issue. I've restored windows 7 trught its hidden partition then i installed kubuntu 12.04 which didn't installed the grub loader. Hence via the same usb-live i used boot-repair which have found all the system that are: kubuntu + its recovery mode windows 7 /dev/sda1 windows 7 /dev/sda2 windows 7 recovery I don't know why i have got 2 windows loader, but they seem (to me) to load the same system. I tryied to see what is there written in the grub.cfg and it seems that the "root" directory for the two system is different eventhought when i load from sda1 i got "Avvio windows" (italian laguange that i choosed) and on sda2 i got "start windows" in the english language when the splash screen load. Can you PLEASE help me removing one of the two entry? i can not really see them, i want only one but i don't know how to act.. Thank you very much indeed. Lorenzo

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  • Suddenly today, no HDMI on both Ubuntu 12.04 and Windows 7. What is HDA driver?

    - by Mike
    In the past, I just plug in hdmi, then boot laptop, and I have display on tv. Today my tv reads as "No Signal". When I go into "sound" on dashboard, there is No HDMI option. I don't understand what could have changed in the past few days. I also have Windows 7 on this machine, and I have same issue on there as well. In Ubuntu I scanned for drivers, and it asked if I wanted to activate HDA driver for DKMS. I'm not sure what that is. I googled and it looks like an audio driver. In Windows, Its says driver is up to date.

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  • My system screen goes black and displays Term Signal Killed?

    - by Quandite
    My computer will often just die randomly while I am using it. The screen goes black and sometimes displays the words TERM signal killed along with other things and sometimes it displays nothing. The writing stays on the screen momentarily before it disappears to just black. I then have to hold in the power button to turn it off and then re boot. Here are the specs... help! Ubuntu 10.04(lucid) Kernel Linux 2.6.32-23-generic GNOME 2.30.2 memory 495.7 MiB processor Intel(R) Pentium(R) 4CPU 1.80GHz

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  • Ubuntu 12.04 Battery problem

    - by Rahul
    I have my laptop ( Dell Inspiron 14R) on dual boot with Ubuntu 12.04 and Windows 7. While using Windows 7, I used to get about 2.5-3 hours on battery fully charged (with my cellphone connected for 3g Internet). The battery is almost 2 years old. But in Ubuntu 12.04, I'm getting only about 1-1.5 hrs on battery. I tried installing jupiter, also tried some tweaks that were mentioned in the forums, like editing the grub file. But nothing seems to work. I am not sure if any app is draining the battery. The one application that I use always is firefox. It's always open. Is there any way I could get at least 2.5 hrs of battery time?

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  • how to modify another user's .profile from the recovery console?

    - by Pinpin
    Pretty much everything is in the title, really! ;) I installed a few components to compile go programs, and the last step was to add the go directory to the path. Being a total ubuntu noob, I added the line PATH="Path/To/Folder", after the one that was already there. After the first reboot I can no longer log into ubuntu (the screen black-out for a while and then I'm back to the login screen, and the same chime greets me.) I've been able to boot in recovery mode, open the root's profile with vi, but I cant find my other user's profile, nor pretty much anything.. Any hint would be greatly appreciated! Pascal

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  • GRUB install error

    - by Rohit
    Whenever I try to install Ubuntu, I get a fatal error that reads: 'Executing'grub-install /dev/sda' failed. This is a fatal error.' Its the same as this, but my graphics appear to be running fine. Also, I'm a complete novice at this and really need simple instructions to understand what I'm doing. I've tried booting from a LiveCD and a USB stick. I don't want to dual boot it because its an old computer that I erased XP and plan on only using Linux on it. When I used a USB stick and set the persistent file storage high, I was able to run it, but only as long as the flash drive was plugged in.

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  • How do I turn off all the password prompts?

    - by Barkerto
    I've been using Ubuntu 12.04 LTS since release and am trying to figure out a couple things about all of these passwords and key-ring prompts that I've just been living with for a while. Ever since install it seems that every time I boot up my computer and want to do anything (ie. use the internet, use a internet browser, install something, delete something, pick my nose) I'm always prompted for either a normal password entry or a key-ring password entry. Is there anyway to turn off all of this "security" and tell my Ubuntu that it can trust what I'm doing and go take a shower? Thank You in advance, barkerto

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  • Lost power during upgrade, how do I recover?

    - by Ryan McClure
    I was attempting to update my 11.10 install to 12.04beta. During the install step, I accidentally lost power to my laptop (the power cable came unplugged) and it shut down. Whenever I go to boot now, I can select my install via Grub and it loads up to where the sign-in should happen, but I get a display that looks like what you see as soon as you shut down. It looks like it locks after checking for the battery. Is there anyway, with or without Live media, to restore my machine's install/update to 12.04 but still keep my settings/applications/files?

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  • Ghosting Program for Ubuntu 12.10

    - by Sean Webber
    I am looking to figure out how to set up a mass backup system for a computer network (of about 25) and am looking for a ghosting program that makes an image of the entire system for backup/recovery purposes. While clonezilla would work.. you have to manually boot us the CD for it. I am looking for a program that runs INSIDE Ubuntu that sends a system image backup off to the network server at set times, then when needed could also be used to burn the clone back to the machine. Another words- automatically and the only time I have to do anything to it is when I need to burn a backup BACK to a 'crapped' machine. Any ideas?

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  • Trouble with Ubuntu 12.10 install/evaluation

    - by Mike H
    I am trying to install Ubuntu 12.10 onto my Compaq Presario SR1215CL. I downloaded ubuntu-12.10-desktop-i386.iso file using BitTorrent and burned it to a blank DVD-RW. When I boot the computer with the Live Disk in the disk tray I am able to get to the Welcome screen. If I click on "Try Ubuntu" I am left at a blank screen except for the desktop background. There are no menus, toolbars, icons, etc. If I press Ctrl+Alt+Delete at this stage I am able to log out of the Live Session, but am unable to log back in. If I click on "Install Ubuntu" instead, I am able to proceed fairly far into the installation process, but eventually it quits and drops me to the same blank screen as above. I'm not sure at which stage the installer quits, but it does ask me to identify the issue and solve the problem myself from inside the Live Session, which doesn't work. Does anyone have some suggestions on how to get Ubuntu installed and working?

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  • How do I fix this half screen problem?

    - by link1275
    I just installed 12.04, and my entire screen is being displayed entirely on the top half of my screen. The bottom half is always black or some technical garbage from the boot up. To interact with the bottom half of the screen I have to move the mouse over the screen to pull part of the bottom half of the screen on top and vice-versa. Does anyone know how to fix this? Also my computer told me, at startup, to go to here: http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware.

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  • Ubuntu 12.10 Laptop temperature

    - by romi
    I'm using a laptop having dedicated graphics card with Ubuntu and Windows 7 dual boot. The windows 7 idle temperature for cpu is 51C average and gpu is 46-48.5C, and when in load Cpu temp varies between 55-61C, and GPU 49-51 MAX. But in ubuntu idle temp CPU: 54c Gpu(ati radeon,proprietary driver installed): 50C and on load cpu: 58-69C gpu:53C max. Is it normal? If not is there any solution? Note that i'm using jupiter,latest graphics driver, grub tweaks etc.

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  • Rebooting yes, Shutdown no

    - by Chiotis Leonidas
    Hello everyone and thanks in advance. I am new in Ubuntu and have the 12.04 version dual boot with Windows XP. I have the following problem. The laptop can reboot using the reboot option from the menu but it cannot shut down. It starts shutting down, the dots appear but then it freezes and does not turn off. Sometimes it shuts down normally (usually just after an update) but then it loses that capability again. Some strange things, I noticed that when the dots freeze, the USB mouse loses power, BUT the usb-powered cooling pad continues to work The only Fn shortcuts that work all the time are the Volume up, down and mute, BUT sometimes when the other Fn combinations (screen-off etc) work the computer shuts down normally I searched a lot on my own, please help.

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  • Default groups for user in Ubuntu 12.10?

    - by Sukminder
    Installed HP Linux Imaging and Printing by using install script and something crashed. Now I'm only member of my own group and lp. Which are the default groups for users in Ubuntu 12.10? Same as this? And, out of curiosity, is there some place where this information is logged? As i.e. some log file showing which groups my user was on previous boot? And/or is this information ,(which groups are default), documented somewhere? OK Found answer. Adding when I'm able (haven't got enough points and have to wait hours to answer myself).

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