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  • How OS comunicates with HW?

    - by Jack
    Hi, how can program runnig on CPU (mostly OS) acess other PC hardware? Such as Graphic card, HDD and so? From what I read, In DOS, this was done using BIOS calls, specifically INT instruction. But, int instruction should only jump to the certain space in RAM. So, how can some program stored in RAM acess other computer HW, when CPU can acess only RAM, and reeive interrupts? And, does windows use int instructions as well, or is there any new way to communicate with HW? Thanks.

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  • Fresh install of 64 bit 12.04 over 32 bit 11.10 alongside Windows 7

    - by Pareen
    I currently have Ubuntu 11.10 32 bit and Windows 7 dual boot in separate partitions. I am trying to do a fresh install of Ubuntu 12.04 64 bit (mistakenly installed the 32 bit 11.10 a little while ago.. I need a 64 bit version to support AOSP build) OVER my the exisiting 11.10 partition. I have referenced How to Install fresh 12.04 install to a PC with dual booting Windows 7 & Ubuntu11.10?, as well as other posts on using the Live CD to do a fresh install. However, the problem I am experiencing is when I bring up the install screen, it says the following: This computer has multiple operating systems on it. What would you like to do. (3 options) Install Ubuntu 12.04 alongside them Replace all with Ubuntu 12.04 (Warning, this will delete files across ALL operating systems) Something else (you can create or resize partitions yourself) This is different from what is in other posts, as mine states that there are "multiple O.Ses" and doesnt individually allow me to replace the Ubuntu 11.10. I don't want to replace ALL O.S.es: I need to preserve Windows 7 and am only trying to replace the old Ubuntu 11.10 partition with the new 12.04 64 bit. I did have Ubuntu installed via Wubi (I believe it was 10.04) prior to putting 11.10 in a separate partition, but I have removed it via Add/Remove programs in Windows. I was wondering how to go about doing this... Should I use the "Something else" option to bring up the partition manager, and just assign my existing 11.10 partition with root mount point + swap space. Will this do the same thing by overwriting with fresh 12.04 install?? I appreciate all your help.

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  • Network router and switch configuration

    - by gilly3
    Can I put a switch before my router in my home network? Here is a diagram of how I want to set up my network: ________________________________ ________________________________________ | | | | | Cable Access Panel | | Home Office | | _____________ ________ | | _____________ | | | | | | | | | | _________ | | | Cable Modem |--->| Switch |-------------->| Router |____| | | | |_____________| |________| | | |_____________| | Printer | | |______________________/____\____| | / | \ |_________| | ___/_ _\___ | _____/ ____|____ \_____ | | | | | | | | | | | | | | PC1 | | PC2 | | | PC3 | | Ext. HD | | PC4 | | |_____| |_____| | |_____| |_________| |_____| | |________________________________________| The reason I want to do this is because my router is also my wireless access point. My cable modem is located in the far corner of my home where my phone/tv/network access panel is. I'd rather keep the wireless access point in a more central location, but I'm not sure if DHCP will continue to work properly with that configuration. Edit: I'd like to continue to be able to share files and access my networked drive and printer from each computer in the house.

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  • 2 folders in Sys/Class/Backlight?

    - by zebrapie
    ISSUE: Backlight brightness does not change. More Detail: Brightness will not change, using both 'System Settings-Screen', or FN keys (Brightness bar shows and moves, but screen brightness does not change). Notcied a post in this thread (http://ubuntuforums.org/showthread.php?t=1866283) about having multiple folders in Sys-Class-Backlight... I HAVE TWO FOLDERS TOO! 'intel_backlight' and 'acpi_video0' Using the function keys, alters the value in the acpi_video0's 'Brightness' file - But doesn't actually alter the brightness of the screen. If I add 'backlight=vendor' in Grub, my function keys then edit the value in the 'Intel_Backlight brightness file. - But again doesnt actually change the brightness of the screen. Computer: Fujitsu Siemans Pi2515, Intel Integrated Graphics, No hdd partition. Already Tried: -Editing grub to contain: acpi_osi=Linux acpi_backlight=vendor -http://ubuntuguide.net/change-screen-brightness-with-fn-key-in-ubuntu-11-0410-10 -sudo apt-get install acpi -$ sudo setpci -s 00:02.0 F4.B=20 -Brightness does not adjust in fallback mode either. -Reinstalling OS, Using Linux Mint (Same problem). -Upgrading and downgrading BIOS. Many thanks for reading, I understand this problem may need a bit of a Linux pro to sort. If anyones up for the challenge i'll spend any amount of time being walked through this, posting results. Don't want to give up here!

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  • Protected flash video (requires HAL) on Gentoo

    - by Mala
    I am unable to play "protected" flash video, such as Amazon Prime Instant Video. From what I've read and uncovered, this seems to be due to a lack of HAL being installed on my computer. Confirmation that it is required for protected video can be seen towards the beginning of http://helpx.adobe.com/x-productkb/multi/flash-player-11-problems-playing.html However, hal is not in the gentoo portage tree, and in any case has been deprecated and replaced by udev. How can I go about getting Amazon Prime Instant Video to work again? I was considering grabbing the source from http://www.freedesktop.org/wiki/Software/hal but the links there won't load, and trying to install it from old ebuilds or from overlays which claim to still support it (e.g. kde-sunset) result in a compilation error: In file included from addon-generic-backlight.c:38:0: /usr/include/glib-2.0/glib/gmain.h:21:2: error: #error "Only <glib.h> can be included directly." Has anyone else solved this issue?

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  • Extend university wifi network [migrated]

    - by asfasdoiuh ouhouhouh
    i live in a university campus and i can get wifi signal on the outside of my window but not in the house. The solution i use at the moment is a usb wifi dongle outside connected to my laptop but the lack of an internal antenna make the connection quite unreliable at times. So i was trying to find another solution to improve the reception of my network. One idea is to setup a router on the outside (in a place with stronger signal) and redirect the connection inside the house with an ethernet cable but the problem is that our Uni Wifi is managed by a capitve portal (BlueSocket with DNS redirection to login page) and the authentication has to happen on the mac address that connect to the net (so the client appliance in this case). If I use a router with Mac-Clone capability i will be able to be redirected trough the captive portal on my laptop computer and login from there or i need to setup my router to fill in the login page by itself? There are other hardware/software solutions i can use to get what i want? Thank you all

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  • Windows 7 Won't find Lexmark X4550

    - by cameronoleav
    I just got Lexmark X4550 wireless printer and want to have it installed on my laptop Windows 7 Beta. I have installed using Lexmark drivers and doing a "add a printer" device search. But when I tried to print a document i got an error message: "Communication not available. The printer cannot communicate with the computer...". This pinter used to work perfectly on my Windows XP Pro SP3. Any help would be greatly appreciated.

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  • Installed IE8 & SP3 on XP now I can't HTTPS from any browser.

    - by Kevin
    The computer is Windows XP Professional SP3 with IE8. On the Tools Options Connections the "Settings" is GRAYED OUT (I am an admin on the machine) Any browsing of https:// addresses results in IE displaying the following: "this program cannot display the web page" After installing an alternate browser and trying the same https:// address I get a similar error message. I have tried using Compatibility View Settings to for all web pages and this has no effect on the problem. HTTP addresses work fine, I can PING sites such as google.com without issue. Question: What could be preventing me from getting at the settings to check to see if I'm using a proxy? What else could be preventing HTTPS access?

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  • Sending files through ssh

    - by Frion3L
    I need to send files to a server using ssh. I have never used ssh so this is being really frustrating to me. Mention the client (me) is using windows and the server is using Ubuntu. I connected to the server using ssh2 ip, and then loging with an account I have. Now, I would like to send my files to a folder in the server, so, I moved to the folder and I used this command: scp test.txt user_name@host_direction server_folder_destination And it always return that it can't do 'stat' over test.txt, the file doesn't exist, and so. I'm assuming ssh2 can't see the file in my computer root (C:), so I tried to specifie more and added: C:\test.txt, but apear the same error. I don't know what is happening. Any hints please? Thanks

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  • Transferring to a SSD using Windows Explorer?

    - by Nick
    I've just bought a new SSD (regretting this already) which I want to make my primary hard drive on my new computer. It's a fresh Windows 8 install, so I'm wondering if I can just copy the entire contents of C: onto my new SSD drive, or will I need to copy other things too such as boot records? I don't have a CD drive unfortunately (I removed it to put in the SSD - it's a very small HTPC) and I don't have any USB stick to make a bootable copy of Clonezilla or similar. UPDATE: I have decided to re-install Windows 8 from scratch onto the SSD, the problem is obtaining the serial key that is embedded into the BIOS. I actually have a spare, unused product key from my desktop I'm writing on now, but I'd rather not use that when I already have a valid key in my new HTPC :( Thanks :)

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  • Is there a NVIDIA driver (for a 7-series card) that will actually work for 12.10?

    - by DS13
    I see many similar topics on this, but I've tried all their suggestions, and nothing has worked. ISSUE: I do a clean install of Ubuntu 12.10. Boots fine with the “nouveau” graphics driver – graphics are very slow and choppy. The three other driver options in Ubuntu (official NVIDIA drivers), all result in a variation of the black screen on boot up. There will be NO access to a command line/GUI in anyway what-so-ever (tried every option recommended out there, but the system is unusable at this stage). I can only reinstall, and try different drivers…and I only ever get one shot at it. QUESTIONS: Does anyone know of a NVIDIA driver that will actually work with a Nvidia GeForce 7350LE? Or a 7-series card in general? This is my second computer, and I’m just trying to get a working install of Ubuntu on it. I don’t want to put much money into it, as I have seen Ubuntu run great on much older/less capable machines. I’ve got a decent Intel processor (2.3Ghz), 2GB of RAM, 320GB hard drive, 32-bit architecture, and there is no other O/S installed. It appears as if the graphics card is holding me back. Should I just buy a cheap graphics card (non-NVIDIA) to put in as a replacement? TRIED SO FAR: -all drivers available in Ubuntu *all fail -manual install of some different NVIDIA drivers *all fail -also tried installing the generic kernel, Nvidia driver doesn't work in 12.10 *no difference -every method suggested to at least get a command line after switching to a NVIDIA driver *all fail

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  • How to join the World of Programming? [closed]

    - by litebread
    Name's Vlad and I am currently on my third year of Community College, studying Computer Science with emphasis on Programming in C++ and Networking. I have completed a few programming courses with general ease, but have not gained advanced understanding of programming through school. None of my friends are serious programmers working in the industry. Being an active lurker on many programming websites, and in general tech oriented sites I have noticed how little I know about the industry, the lingo and terminology. (I have no clue how Git hub works, but I generally understand what its for). So I am looking for help as to where I should look for information on the programming world and the industry in which I a very interested. By that I mean, what sites I should utilize to gain information on programming practices, introduction to advanced C++ and resources that simply introduce a 20some programming noob. I like programming, but I haven't dug my hands deep into it yet, I want to start to do so before I transfer to a University. All in all, where do I find information on becoming an actual programmer (Information that lays out a path). Thank you for reading. Have a great day!

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  • Weird files in User folder

    - by Vervious
    In my user folder (C:/Users/myAccount/) theres a set of interesting hidden files that I've never seen before (right now it's a fresh install of Windows 7 Ultimate). These are: NTUSER.DAT, ntuser.dat.LOG1, ntuser.dat.LOG2, and NTUSER.DAT(whole chain of numbers and letters).TM.bif, NTUSER.DAT(whole chain of numbers and letters).TMContaineretcetc.regtrans-ms, and another similar one. When I try to delete them, it says the system is using them. I've never seen these files before. Are they ok to delete? Or should I leave them in my home folder? I always keep "Show hidden files" as well as "Show System files" checked, since I prefer being able to see all the files on my computer. If I shouldn't delete them, is there at least a way to tidy them up a bit? Thanks.

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  • How can I disable HTML5 content in popular browsers like Firefox and Chrome?

    - by HRJ
    The bad thing about Flash video was that it required a third-party plugin to play the content. The good thing was I could select which content to play; using the click-to-play feature in Firefox and Chrome. But now that HTML5 video is getting popular, I see a lot of ads popping into view again. They are not only a distraction, they hog resources on my computer and make the fans spin full speed. Is there a way to disable HTML5 audio/video content by default, and enable it only selectively?

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  • What's the typical latency for key strokes using an ssh connection on a local wifi network?

    - by dan
    I develop software on a Macbook Air 1.6 Ghz but find running Rails test suites and generators on this computer very slow. I'm thinking about buying a Linux tower to put on my local wireless network to do my Rails development on. I would want to use my Macbook Air and ssh into the Linux box and do my development with Gnu Screen, vim, etc. Can I expect the keystroke and echo latency for a ssh session between two machines on a local wireless network to be negligible? Does anyone develop using this kind of local setup?

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  • WDS (Wireless Distribution System) not work [migrated]

    - by xdevel2000
    I've a dlink di-524 as main router (192.168.0.1) connected to Internet and a second router (192.168.0.2), a tplink wr841n, with WDS enabled and correctly configured to "join" with dlink. After I connect via wireless a laptop (192.168.0.100) to tplink and both work good but with the laptop I can't go to Internet. It seems as WDS not work. With the laptop I can only ping the tplink but other ping (the dlink or other LAN computer not responding). What's the problem? Perhaps also the dlink must have the WDS option? Thanks.

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  • Windows 2008 x64 displays SP1 when SP2 is installed

    - by Graham Powell
    After setting up a Windows 2008 x64 server (not R2), I installed a number of Microsoft updates. After installing these updates, the computer reports that it has SP1 installed, not SP2. I believe the culprit is KB917607, which allows Windows 2008 to display .hlp files. Now I have to upgrade Internet Explorer on this server, and it won't install without SP2. I am very leery about reinstalling SP2, as I have installed a large number of post-SP2 updates, and I've had issues after reinstalling SP2 in similar circumstances. How can I fix Windows so it reports the correct service pack?

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  • Windows 8.1 will not boot after upgrading from Windows 8 on my PC

    - by user266969
    I have not found a fix. After running the Windows 8.1 Update from the store my computer will not boot unless In insert my recovery USB drive and try to repair. (The repair fails.) However after I power of the PC and remove the USB drive. The PC will boot correctly once. I would leave the PC on but it shuts it self off at night. (And yes I have checked my power profile, it is set to never.) The only thing I have found online is a possibly corrupt video driver. I uninstalled the video driver reboot and it did not fix the issue. Anybody have any suggestions? The PC is a HP EliteBook 8730w laptop. I had no issues with Windows 8 or the Windows 8.1 preview.

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  • What credentials should I use to access a Windows share?

    - by JMCF125
    Hi, I have installed Samba and CIFS and all that, followed a bunch of tutorials, but still I can't access a share in the separate Windows 7 machine. Before I could access a share in Ubuntu from Windows, but although now I can't for whatever reason; the error of the attempt to mount the Windows share is the same: 13, asking for credentials (the computer with Windows is off now, but I can add the exact error message later). In /etc/fstab I have: # ... (help info) ... # <file system> <mount point> <type> <options> <dump> <pass> # ... (mounting points that don't matter for the question) ... //192.168.1.2/C\:/Users/Public/Documents /srv/Z\:/ cifs user=guest,password=,uid=1000,iocharset=utf8 0 0 I also tried options such as username=guest,uid=1000,iocharset=utf8 and guest,uid=1000,iocharset=utf8, which, of course, don't work. What user am I supposed to use? (user=user; username=user; my credentials in the Windows and Ubuntu machines do not work, at least with the syntax I tried - similar to this). Even if this worked it's not actually what I want. I wanted to setup an authentication for any one trying to access the drive (it's currently 777, for the Linux share as well) and put a limit/quota on the share's use (as I see Z:on Windows, it allows for the entire C:drive to be filled). Thank you in advance. I'd be glad if you suggested a way to do this even without the last paragraph.

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  • Strange ports on default install of W7

    - by Sabre
    I have a base new install of windows 7, and when I went to look for something else I saw the attached netstat output. What concerns me is that this is Windows + Truecrypt + drivers, nothing else installed. The sequential high ranged ports belonging to several different seemingly not out of place services seemed odd. So I torched the install, used Active@ to scrub the disk, re-downloaded the ISO from MSDN, and did a fresh reinstall, viola, they are there again. It just seems out of place, I have seen a many netstats over the years, this one just strikes me as odd, so I started thinking rootkit? (JUst FYI, when I reloaded I named the machine "Error" so that is why the task manager reads the computer name as such.) So I would like to know if anyone else could explain it, and therefore is may be normal, or would they be worried as well, and should I start considering I have some very strange thing occuring on my network?

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  • Where can I find more information on "Kinds of Information Systems" [on hold]

    - by arielnmz
    Disclaimer: This is not a Power User question, but rather more of the Computer Enthusiasts kind. Also, I don't know the right site to post this kind of question. I'm writing a paper in which I am asked to mention and describe "5 types of information systems" to which my teacher explained: Like Web, Mobile, etc…, for example… He also said that we're not able to mention and describe those mentioned above. So the question is: What is the right topic to research or look into for more information about these different types of "information systems"?

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  • Using onboard and pci-e graphics card at the same time

    - by Endle
    Hello wonderful people. I know there are several other posts with similar questions. I also know how to use Google. I also have read up on posts discussing bumblebee, crossfire, ati catylist and many other interesting topics. I would just like someone to give me advice on how to use the onboard and pci-e graphics at the same time. I know the computer is capable of doing this. It works in Windows. I can use the VGA and DVI onboard port and the HDMI port of the add on card all at the same time. Works great in Windows 7, In Ubuntu, it seems only one or the other will work. I can use any combination of two displays on either adapter: VGA and HDMI..HDMI and DVI..so forth and so on. I have started experimenting with xorg.conf files, but have not been able to get any of them to work. Here is my last attempt at writing an xorg.conf file: Section "ServerLayout" Identifier "X.org Configured" Screen 0 "Screen0" 0 0 Screen 1 "Screen1" LeftOf "Screen0" Screen 2 "Screen2" LeftOf "Screen1" InputDevice "Mouse0" "CorePointer" InputDevice "Keyboard0" "CoreKeyboard" EndSection Section "Device" Identifier "Onboard Video" Driver "radeon" BusID "PCI:01:05.0" EndSection Section "Device" Identifier "Graphics Card" Driver "radeon" BusID "PCI:02:00.0" EndSection Section "Monitor" Identifier "CRT2" Option "VendorName" "ViewSonic" Option "ModelName" "Generic Autodetecting Monitor" Option "DPMS" "true" EndSection Section "Monitor" Identifier "DVI1" VendorName "ACR" ModelName "P224W" Option "DPMS" EndSection Section "Monitor" Identifier "DVI2" Option "VendorName" "Acer" Option "ModelName" "Generic Autodetecting Monitor" Option "DPMS" "true" EndSection Section "Screen" Identifier "Screen0" Device "Onboard Video" Monitor "CRT2" DefaultDepth 24 SubSection "Display" Depth 24 Modes "1280x1024" EndSubSection EndSection Section "Screen" Identifier "Screen1" Device "Graphics Card" Monitor "DVI1" DefaultDepth 24 SubSection "Display" Depth 24 Modes "1920x1080" EndSubSection

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  • Cannot connect to FTP server from external host

    - by h3.
    I have a FTP server (vsftpd) setuped on a Linux box (Ubuntu server). When I try to connect with a computer on the same network everything works fine as expected. But as soon the IP is external it won't connect.. I first assumed the port was blocked, but then: localserver:$ sudo tail -f /var/log/vsftpd.log Wed Jan 13 14:21:17 2010 [pid 2407] CONNECT: Client "xxx.xxx.107.4" remotemachine:$ netcat svn-motion.no-ip.biz 21 220 FTP Server And it hangs there. Do any ports other than 21 need to be open?

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  • Problem deleting files in Windows 7

    - by Alex Yan
    Happens sometimes but frequently enough to be a pain in the bum. I press Del or Shift + Del but the file stays there. Then when I try to delete it again, it says that I need permission from the Admin. For it to be deleted, usually I have to restart my computer List of things I've tried: I have admin privileges Hasn't happened since I reinstalled Windows and another form of this happened in my install before the last one I tried takeown in cmd but it says ERROR: Access is denied The files sometimes disappear by themselves after 2 mins or so Refreshing the folder doesn't do anything Unlocker doesn't work either. It asks me if I want to delete it the next boot Windows 7 x64 Pro HDD: Fujitsu MHZ2320BH G2 ATA 320 GB 8MB Buffer 5400 RPM

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  • Why Can't Computers Off My Network See the Site?

    - by nmagerko
    Have just set up Apache, PHP, MySQL, etc. on my Ubuntu OS, and I was wondering why computers that are not on my network can not see the basic index.html that Apache uses as the default. I set up the static ip address for my computer, and I use 192.168.1.100 for computers to view the simple site. Is there something I am missing that will allow others to access my site? (It is REALLY simple; no graphics, CSS, etc.)

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