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  • hardware addressing and configurable addressing scheme

    - by Zia ur Rahman
    basically i want to ask question about configurable addressing scheme for LAN interface hardware. i have read about it from a book, some main points are given by a configurable addressing scheme provides a mechanism that a customer can use to set a physical address.The mechanism can be manual (the switches that must be set when the interface is first installed).or an electronic memory such as an EPROM that can be downloded from the computer(what does this means). Most hardware needs to be configured only once- configuration is usually done when the hardware is first installed. Question:Suppose a network administrator configures the LAN interface hardware (assigns the address) when he installs it. Now later on if he needs to change the physical address of the device can he change it? Or in this addressing scheme the hardware can only be configured once and we can not reconfigure it later on.

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  • Windows 7 pc freezes for an indeterminate amount of time after unlocking

    - by pikes
    Not sure if this type of question is appropriate for this forum, but I've tried everything I can think of to solve this problem aside from format/reinstall. I recently got a new work PC (Dell optiplex 755) with windows 7 professional x64. Standard developer software installed for .net development: VS2008, VS2005, SQL management studio, office 2007, etc. Recently I've been having this weird problem where after I lock my pc, when I try to unlock it, the screen will be black for awhile after unlocking. I can ctl+alt+del and put my password in but then it just goes black. The amount of time on the black screen seems to be related to the amount of time I am away from my PC. If only away a few minutes, it'll take about a minute to get to the desktop. If away for an hour, could take up to 15 minutes. If I lock it and go home for the night, I have to restart my PC in the morning (I've let it sit for an hour after a night of being locked and nothing happened). It doesn't do it every time but definitely the majority of the time. One weird thing I've seen is that if I remote into my machine before trying to log back in it does not do it. I uninstalled all software back to the point when I remember it started happening and it still does it. I was using this PC for a few weeks without this problem happening at all. Anyone know what my next troubleshooting steps could be? My IT department tried to fix it by moving my old profile to another disk and having me log in, effectively recreating a profile from scratch but that didn't solve it. As I said above if this isn't the right forum for these types of questions please let me know. Thanks in advance!

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  • Virus ridden computer freezes on startup - can't access safe mode

    - by Eric
    Someone whom I love but who cannot be trusted with a live internet connection downloaded a particularly nasty virus that in turn downloaded a variety of unknown other viruses onto my home computer. The computer now freezes completely a few seconds after reaching the desktop and is unresponsive to any keyboard or mouse command. There are videos of my little kid on this hard drive that are not backed up and that I cannot bear to lose. But if I could get in there long enough to copy them off to an external drive I would have no problem doing a clean windows install to fix the problem; everything else is backed up online but the videos were too large. Normally I would start by going into safe mode but I have a large Dell monitor that doesn't show anything until the welcome screen appears. I think that I have gotten into the setup screen once or twice by mashing keys before I can see anything, but this monitor doesn't support that so I can't see what I'm doing to get it to boot from CD or anything else. I'm at my wits end. Any advice?

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  • How to quickly switch monitors on multi-monitor setup?

    - by Saxtus
    At my desktop PC, I have 3 displays hooked up on my Palit GeForce GTX 480 to extend my desktop: DVI: Samsung SyncMaster T220 (22" 16:10, 1680x1050, as my main) DVI: Samsung SyncMaster 940BF (19" 4:3, 1280x1024) HDMI: Sony Bravia KDL-32D3000 (32" 16:9, 1360x768) As expected, the GFX card can only utilize 2 of the displays at any given time, so I have to manually switch using Windows' "Display Properties" dialog, each time I want to switch between them. I've tried UltraMon, DisplayFusion and PowerStrip (so please don't refer me to a question where those are given as solutions) but they are unable to switch monitors. Instead they can only change display resolutions and settings on the existing active monitors, with specially weird results when I've saved the monitor states and then tried to switch monitors using the saved states! Any idea on how to bypass the awful "Display Properties" dialog and it's "confirm your change" timer?

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  • Reconnoiter - Anyone using it?

    - by Marco Ramos
    Reconnoiter is a new tool in the world of monitoring. It is not only a trending tool but also alerting/fault detection one. In my particular case, I reckon that it's in the trending capacities that Reconnoiter has a very huge potential. One of the premises Recoinnoter is built upon is that RRDTool large installations are very inneficient regarding I/O and I think this is RRDTool major problem. One of the things that would make me change from Cacti is, obviously, the cost of change and the learning curve. So, any of you has experience with Reconnoiter? How's the learning curve? Was it difficult to move from RRDTool frontend applications (Cacti, Munin, Ganglia) to Reconnoiter? I'm looking forward to read your opinions.

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  • Ubuntu 10.04 freezing and Ctrl + Alt + Backspace does nothing but music keeps playing

    - by Bryce Thomas
    I'm having intermittent problems where the screen will freeze in Ubuntu. I've tried using Ctrl + Alt + Backspace to restart the X-server, though this does nothing. When the freeze occurs, there's a small square of black dashes around the mouse pointer - maybe 1 inch in size. These dashes look a lot like a 2d barcode. The rest of the screen looks normal, but I can't move the mouse and none of the keyboard shortcuts work to do anything. However, music that I begin playing before the freeze continues to play, which seems to indicate it hasn't stalled up completely. I've noticed a similar freezing problem when I'm using Windows 7. That is, I see the same barcode like dashes around the mouse pointer when it freezes up. So I'm guessing it's either a driver or hardware problem. I thought if it was a hardware problem though, the whole computer might stop working (i.e. music would stop playing)? The video card I am using is an Nvidia, and I believe it's in the 7600 range. In Ubuntu I have the drivers for the card set to the latest available (proprietary). Ideally I'd like to be able to continue using the proprietary drivers. Is there any known issues with the drivers for this model graphics card, or has anyone experienced the same problem and knows how to fix it?

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  • How to force a "do you really want to shutdown?" dialog in Windows 7?

    - by Vokuhila-Oliba
    Sometimes I want to choose "Logout current user", but then I hit "Shutdown" by accident. Nearly everywhere else Windows 7 is asking "do you really want to do this? Yes/No" - but that's not the case when I hit the "Shutdown" button. Windows 7 shuts down immediately without giving me the chance to correct my mistake. So I am wondering - why does Windows shut down immediately without asking "really do that?" in this case? Is there a way to change this behavior? For example, could I force Windows to display a dialog asking "Do you really want to shutdown?"? I tried to change this behavior with the policy editor. It seems to be very easy to completely remove the Shutdown button from the Start menu, but I couldn't find an entry to turn on such a Yes/No dialog.

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  • Join domain in windows 7 [on hold]

    - by Hassan Ali Khan
    I have created a domain on server machine and when i am trying to join a domain through another machine of windows 7 through the following steps: Goto MY Computer Properties - Change settings - ComputerName - click on change button - click on radio button "Domain" and enter domain name. After that when i click on OK button and enter the username and password credentials. It show me the following error: An attempt to resolve the DNS name of a domain controller in the domain being joined has failed. Please verify this client is configured to reach a DNS server that can resolve DNS names in the target domain

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  • Windows 7 pc freezes for an indeterminate amount of time after unlocking

    - by pikes
    Not sure if this type of question is appropriate for this forum, but I've tried everything I can think of to solve this problem aside from format/reinstall. I recently got a new work PC (Dell optiplex 755) with windows 7 professional x64. Standard developer software installed for .net development: VS2008, VS2005, SQL management studio, office 2007, etc. Recently I've been having this weird problem where after I lock my pc, when I try to unlock it, the screen will be black for awhile after unlocking. I can ctl+alt+del and put my password in but then it just goes black. The amount of time on the black screen seems to be related to the amount of time I am away from my PC. If only away a few minutes, it'll take about a minute to get to the desktop. If away for an hour, could take up to 15 minutes. If I lock it and go home for the night, I have to restart my PC in the morning (I've let it sit for an hour after a night of being locked and nothing happened). It doesn't do it every time but definitely the majority of the time. One weird thing I've seen is that if I remote into my machine before trying to log back in it does not do it. I uninstalled all software back to the point when I remember it started happening and it still does it. I was using this PC for a few weeks without this problem happening at all. Anyone know what my next troubleshooting steps could be? My IT department tried to fix it by moving my old profile to another disk and having me log in, effectively recreating a profile from scratch but that didn't solve it. As I said above if this isn't the right forum for these types of questions please let me know. Thanks in advance!

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  • Changing administrator for hosted Exchange account

    - by RussSchick
    We are using a hosted MS Exchange provider, and they claim that our account can only have one administrator. They also claim that they cannot change which login is granted administrator privileges. This means that the user account that was initially created five years ago is the only account that can change our billing information, among other things. The employee associated with the current admin account is no longer with the company, so we'd like to move the admin privileges to a new "sysadmin" account, and delete this employee's account. Shouldn't this be really easy to do? Is my hosted exchange provider telling the truth?

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  • SSH to an ubuntu machine using avahi

    - by tensaiji
    I have an ubuntu box that I connect to using avahi. Connecting to that box works fine for all services (I regularly use AFP, SSH and SMB on it) but I've noticed that whenever I connect to it from a mac using SSH (and using the ".local" dns name provided by avahi - eg. "ssh .local") SSH tries to connect using ipv6, which for some reason times out (after two minutes) then it tries ipv4 which connects immediately. I'd like to avoid this timeout, as it's really annoying for me and other users - if SSH tried ipv4 first or if ssh over ipv6 worked then that would solve the problem. But so far I've been unable to get either to work (the best I've managed is to specify the "-4" option to SSH to stop it from trying ipv6 at all). I'm using Ubuntu 10.04. Any solution has to be on the server (not the client) as there are multiple clients connecting. A possible complication might be that my LAN is set up to allow link-local ipv6 addresses only, but I have other servers (using Mac OS) that I can SSH into using ipv6) I suspect that the problem could be solved by either preventing avahi from broadcasting the ipv6 address, or by enabling ssh over ipv6, but so far as I can tell avahi is already configured not to broadcast the ipv6 address and sshd is configured to allow ipv6 connections! Here's my /etc/avahi/avahi-daemon.conf (I don't think I've changed anything from the ubuntu defaults) [server] #host-name=foo #domain-name=local #browse-domains=0pointer.de, zeroconf.org use-ipv4=yes use-ipv6=no #allow-interfaces=eth0 #deny-interfaces=eth1 #check-response-ttl=no #use-iff-running=no #enable-dbus=yes #disallow-other-stacks=no #allow-point-to-point=no [wide-area] enable-wide-area=yes [publish] #disable-publishing=no #disable-user-service-publishing=no #add-service-cookie=no #publish-addresses=yes #publish-hinfo=yes #publish-workstation=yes #publish-domain=yes #publish-dns-servers=192.168.50.1, 192.168.50.2 #publish-resolv-conf-dns-servers=yes #publish-aaaa-on-ipv4=yes #publish-a-on-ipv6=no [reflector] #enable-reflector=no #reflect-ipv=no [rlimits] #rlimit-as= rlimit-core=0 rlimit-data=4194304 rlimit-fsize=0 rlimit-nofile=300 rlimit-stack=4194304 rlimit-nproc=3 and here's my sshd_config (mainly updated to only allow pub/private keys): # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 180 PermitRootLogin no StrictModes yes RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords PasswordAuthentication no AllowGroups sshusers # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* Subsystem sftp /usr/lib/openssh/sftp-server UsePAM yes Does anyone have any ideas that I can try, or has experienced anything similar?

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  • What can I do to prevent system power downs?

    - by Joe King
    Yesterday I was given my brother's old laptop - core i7, 2.67GHz, 8GB RAM, 128GB SSD, Win7 64 bit. It's a Sony Vaio Z11. Approx 18 months old. When running something computationally intensive, the fan starts up and after about 30 secs it just powers itself down with no warning. I guess it is overheating. There is nothing in the event logs to suggest what is causing it - the only thing I see is "the last system shutdown was unexpected" or something similar. This is a problem for me because I use a lot of number crunching apps, which pretty much makes it useless to me. I would like to know if there is anything I can do, other than the obvious things I've done already - open up and clean out dust, re-install the OS. According to my brother, this problem started about 6 months ago when it was already outside warranty. If it's just used for simple things - web browsing, word processing etc, the problem does not occur. Any ideas for what I can do to fix this ? Update: I found that the laptop has 2 hardware settings for graphics: Speed and Stamina - the Speed setting seems to use an nvidia GEforce GT 330M, while the Stamina setting uses an Intel chipset. With the setting on Speed, I can hear the fan the whole time, and the system powers down after a short while (5-10 mins) even just doing basic tasks (browsing this site for example), but doesn't shut down if I just leave it switched on. In this mode it also sometimes just freezes the screen and I have to power off myself. However on Stamina setting it only powers down when doing number crunching and never freezes the screen.

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  • How do I stop panning on a monitor that supports a specific resolution?

    - by IronicMuffin
    Hi all, I've been battling this for a few days now. Any and all help is appreciated. I have a planar monitor with a native res of 1280x1024. At one point, I had used PowerStrip to override "something" and set the res to 1600x1200, and it worked great. I then installed new intel graphics drivers for my 86895g (or w/e model) video card, which screwed up whatever settings I had. If I set it to 1600x1200 this time, it would set the res correctly, but give me a 1280x1024 viewport and the screen would pan when the mouse got to the edges of the screen. Absolutely not useful. Ok, so I was limited to 1280x1024 now. W/e. Now...enter new video card with two video ports. I have two monitors now and the latest nVidia drivers. I decide to try to get dual 1600x1200 going...ended up screwing the original monitor up so much now that it's at 1280x1024, with a 1024x768 viewport and panning! Absolutely not usable now. So what I need, and I can't seem to find on any forums, is help doing one or more of the following: Clearing out all monitor/edid info out of the windows registry without corrupting the registry. Actually correctly override the EDID values and get my sweet res back. Some other way of getting back to at least dual 1280x1024 with NO panning. Note: My device manager shows 4 monitors for some reason. My registry shows entries for all sorts of monitors that have been hooked up to the machine over the years. It's making it difficult to debug. Experience with PowerStrip would be helpful. I've been mucking with Phoenix EDID designer and MonInfo as well, but I'm stumbling around in the dark with these. Windows XP SP2 nVidia GeForce 6200 nVidia drivers: v258.96 Monitor: Planar PL 1910M Thanks!

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  • Num Lock of laptop working strangely [Dell Vostro 1710]

    - by Bakhtiyor
    My laptop model is Dell Vostro 17" and it has numeric keypad. The problem is that its Num Lock key works very strange. Sometimes when I press it the information led of Num Lock activates, but sometimes when I try to activate numeric keypad it refuses and this led doesn't activate and therefore numeric keypad doesn't work at all. Does it mean that I need to change my keyboard at all? In addition Esc key doesn't work for a long time. I think the main reason for that is my son (2year old) who started playing with my laptop from his 1st year. If I need to change the keyboard where can I buy it for a good price, because in Dell I think when I called them 2-3 months ago they offered me keyboard for about more then 50Euros. Currently I live in Spain. Thanks.

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  • Can't paste symbol from Character viewer in Mac to Photoshop

    - by Cristian
    This is extremely annoying: I want to paste in a special symbol in Photoshop using the Character Viewer in Mac. I understand that there are some fonts that do not support these symbols, but when I paste this symbol in Photoshop, it appears as an unknown symbol (similar to this: ? ), and I can't even change the font (to anything), it skips back to Myriad Pro. I found a stupid solution to this: using the arrows to change fonts - this seems to work, but still Photoshop doesn't show all fonts that are available in Character Viewer under Font Variation Have you experienced this? I can't remember if it was the same with Windows, but I know there were some bugs too.

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  • AD, Windows-NT Authentication queries

    - by rockbala
    Need Help on the following questions. When a users login (on a computer in the network) is validated against AD what is/are the authentication method used? When a users login is validated in Windows NT environment (not AD) what is/are the authentication method used? If all user's account is on AD, is it possible to change the authentication mechanism only (or protocols) from AD to NT and vice versa (if possible)? If part/whole of question 3 is valid, where should one look to change these authentication methods ? What is the difference between AD and Windows-NT authentication ? Windows server 2008 Domain controller used. Regards, Balaji

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  • Changing the partition icon for Boot Camp

    - by zneak
    Hey guys, I've installed Windows 7 for a dual-boot setup on my new Core i7 MacBook Pro. Now, just for the looks, I'd like to change the volume icon. The partition is in NTFS format. I remember that in the past (with Leopard), you just had to add a .VolumeIcon.icns file at the root of a volume to set its icon. It seems this trick wore off with Snow Leopard. It apparently still works with CDs and DVDs, but hard drives keep that old, boring drive icon, no matter how lovely the .VolumeIcon.icns file I've put at the root. How can I change that?

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  • Sometimes, Synaptics Touchpad Tends Cursor to Top-Right Corner

    - by John Chadwick
    This has been a reoccurring issue for me, pretty much since I've owned this laptop (an ASUS G60JX.) Sometimes, the cursor will stop working properly and instead tend toward the top right of the screen. Basically, sometime into my usage (maybe after a couple hours) the touchpad will inevitably begin to malfunction, where it has confusing patterns of pushing the mouse cursor toward the top right of the screen. In addition, certain features (like momentum) seem to quit working entirely. It makes using the cursor extremely difficult. I've been having this issue across very many drivers. Pretty much as soon as multitouch came into the mix, although I don't believe multitouch has anything to do with it. It appears that, in the state of malfunction, it doesn't matter how you touch the touchpad, but where you touch it. Certain regions do not seem to trigger the cursor to move to the top right corner. In fact, no specific region seems to, but some areas do so more often than others. The issue can be resolved temporarily by putting the computer into sleep mode and awakening it. I have found no way to recreate this success without sleeping the computer or rebooting. Disabling and re-enabling the touchpad device does not do anything to resolve the problem. This issue does not affect my WACOM tablet nor any USB mice, and can be resolved (not to my satisfactory) by uninstalling the touchpad drivers. I'm looking for a solution, or at least a workaround that doesn't require sleep mode.

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  • BSOD: PFN_LIST_CORRUPT and IRQ_NOT_LESS_OR_EQUAL

    - by David Lively
    I built a desktop about a year ago that has, until a few weeks ago, been running without a hitch using Windows 7 Ultimate. Recently, the PC started occasionally rebooting with a blue screen indicating a "PFN_LIST_CORRUPT" error. Also, I've seen at least once the error IRQ_NOT_LESS_OR_EQUAL. I seem to remember temporarily connecting an internal DVD burner about the same time this happened. I burned a DVD for another machine and promptly removed the drive. Yesterday, I reformatted the drive and installed Win7 Ultimate x64. During the first install, the PFN_LIST_CORRUPT bluescreen reared its ugly head again. A second install attempt completed with no errors. The fact that this error happened during a clean install leads me to believe that this is not a driver or OS issue. I also ran the memory diagnostic from the Win7 32-bit install DVD. It completed both passes with no errors. Periodically, the screen will flicker, as if explorer or the video are resetting. In the event log, I see a series of 8 or so errors indicating that some services unexpectedly stopped, and were apparently reset. These include an HID service and some others (I don't have a list in front of me). The PC is a Phenom X2 3 Ghz with a 500GB Seagate drive, 4GB of Corsair XMS2 cm2x2048-6400c5c. Anyone know what would suddenly cause a couple of sticks of RAM to go bad?

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  • CentOS Default ACLs on Existing File System Objects

    - by macinjosh
    Is there a way to have existing file system objects inherit newly set default ACL settings of their parent directories? The reason I need to do this is that I have an user who connect via SFTP to my server. They are able to change directories in their FTP client and see the root folder and the rest of the server. They don't have permissions to change or edit anything but their own user directory but I would like to prevent them from even view the contents of other directories. Is there a better way to do this than ACLs? If ACLs are the way to go I'm assuming a default ACL on the root directory would be the best way to do restrict access. I could then selectively give the user permission to view certain directories. The problem is default ACLs are only inherited by new file system objects and not existing ones.

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  • ganglia graphs like munin for cpu, etc?

    - by CarpeNoctem
    I'm coming from munin and a CPU graph contains data for system, user, nice, etc ALL on one graph. I just installed ganglia and setup the basic monitoring. It appears that each type of cpu data is a separate graph! WTF is this and can I change the defaults to combine these into a single per host? That is my question, how do I combine cpu data into a single graph. Also, can I change the layout to something closer to munin's day-week side-by-side layout? I'm trying to be impartial and give ganglia a chance. ;)

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  • No video signal at boot with custom built computer

    - by Bart Pelle
    After booting my custom built computer, neither the VGA nor the HDMI methods from the video card seem to emit any signal to the display. I have tested both a regular VGA screen and a modern HDMI screen. Both did not receive signal. Below are the specifications from my computer build: Intel Core i5 3350P ASRock B75 Pro 3-M Seagate Barracuda 7200.14 ST1000 DM003 1000GB Corsair Vengeance LP CML 8GX 3M2 A1600 CGB Blue (2 cards) Cooler Master B Series B600 Club 3D Radeon HD7870 XT Jokercard Samsung SH-224 BB Black Sharkoon T28 Case The motherboard does not emit any beeps on startup. The CD tray opens properly and all fans spin. All cables are properly connected. All components are new and no damage was found on any of the components. The fans on the GPU spin aswell. The VGA test we did was by using the onboard graphics from the Intel i5, but this gave no result. The HDMI test was from the GPU which did not emit any signal either. We have not been able to test out the DVI, could this be important to test, even though all the other methods did not work? Thank you for your time and hopefully reply.

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  • Showing protocol specific mini icons for Jabber/XMPP gateway contacts

    - by aef
    Since a short while I'm using Ubuntu Oneiric Ocelot (11.10) with gnome-shell (Gnome 3) and I'm trying to get accustomed to the default Empathy Instant Messaging client. I'm using a gateway service on the side of my Jabber/XMPP server to communicate with lots of contacts over proprietary networks like ICQ or MSN. So I don't use Empathy's native support for ICQ and MSN, and I don't want to change back to using such a thing for various reasons. One thing that annoys me is that Empathy does not make it clear to me that these contacts are from another instant messaging network. If I enable the View Show Protocols option they are all recognized as Jabber/XMPP contacts. Although I perfectly understand why that happens, I would like to be able to change this behavior to make Empathy mark these contacts correctly. Is there a configuration option or a plugin for this? Or may this feature still be in development and will be available later?

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