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  • Hyper-Threading and Dual-Core, What's the Difference?

    - by Josh Stodola
    In a conversation with the network administator, I mentioned that my machine was a dual-core. He told me it was not. I brought up the task manager, went to the perfomance tab, and showed him that there are two separate CPU usage graphs. I have a quad-core machine at home and it has four graphs. He told there were two graphs on this particular machine because of hyper-threading. I used to have a hyper-thread pentium 4 processor back in the day, but I never fully understood what it meant. So what is the difference between hyper threading and dual-core? And how do you tell which one you have?

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  • Function keys on Dell laptop work double as OEM keys

    - by Factor Mystic
    I'm working with a new Dell Studio 1555, and the F1-F12 keys at the top of the keyboard are dual function with OEM keys such as volume and screen brightness. The problem is, is that the OEM keys are the default, and you have to press the Fn key to get the F- key to work. For example, this means you have to hit Alt+Fn+F4 to close a window, instead of the regular Alt+F4. This is really annoying. Is there a way to reverse the default functions of the F- keys in Windows? Ideally this is possible without some kind of third party hotkey manager.

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  • external hard drive is no longer recognized, gives buffer I/O errors

    - by BioGeek
    Hi all, The external hard drive which contains all my photos and where I backed-up all my important documents is no longer recognized. It is a three month old 500GB Iomage Prestige Desktop Hard Drive. When I plug it in, it is recognised as a USB device, because it shows up when I type lsusb, but dmesg gives this error message. [19712.013250] usb 2-2: new high speed USB device using ehci_hcd and address 21 [19712.145347] usb 2-2: configuration #1 chosen from 1 choice [19712.147214] scsi25 : SCSI emulation for USB Mass Storage devices [19712.147514] usb-storage: device found at 21 [19712.147519] usb-storage: waiting for device to settle before scanning [19717.148978] usb-storage: device scan complete [19717.149527] scsi 25:0:0:0: Direct-Access ST350082 0AS PQ: 0 ANSI: 2 CCS [19717.151020] sd 25:0:0:0: Attached scsi generic sg2 type 0 [19717.151685] sd 25:0:0:0: [sdb] 976773168 512-byte logical blocks: (500 GB/465 GiB) [19717.160402] sd 25:0:0:0: [sdb] Write Protect is off [19717.160412] sd 25:0:0:0: [sdb] Mode Sense: 34 00 00 00 [19717.160418] sd 25:0:0:0: [sdb] Assuming drive cache: write through [19717.165685] sd 25:0:0:0: [sdb] Assuming drive cache: write through [19717.165691] sdb: sdb1 [19719.171808] sd 25:0:0:0: [sdb] Assuming drive cache: write through [19719.171818] sd 25:0:0:0: [sdb] Attached SCSI disk [19737.430998] sd 25:0:0:0: [sdb] Unhandled sense code [19737.431007] sd 25:0:0:0: [sdb] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE [19737.431016] sd 25:0:0:0: [sdb] Sense Key : Medium Error [current] [19737.431027] sd 25:0:0:0: [sdb] Add. Sense: Unrecovered read error [19737.431038] end_request: I/O error, dev sdb, sector 6160463 [19737.431050] Buffer I/O error on device sdb1, logical block 6160400 [19737.431060] Buffer I/O error on device sdb1, logical block 6160401 [19737.431067] Buffer I/O error on device sdb1, logical block 6160402 [19737.431075] Buffer I/O error on device sdb1, logical block 6160403 [19737.431082] Buffer I/O error on device sdb1, logical block 6160404 [19737.431088] Buffer I/O error on device sdb1, logical block 6160405 [19737.431096] Buffer I/O error on device sdb1, logical block 6160406 [19737.431102] Buffer I/O error on device sdb1, logical block 6160407 [19737.431114] Buffer I/O error on device sdb1, logical block 6160408 [19737.431121] Buffer I/O error on device sdb1, logical block 6160409 [19737.712183] sd 6:0:0:0: [sdb] Unhandled sense code [19737.712191] sd 6:0:0:0: [sdb] Result: hostbyte=DID_ERROR driverbyte=DRIVER_SENSE [19737.712200] sd 6:0:0:0: [sdb] Sense Key : Hardware Error [current] [19737.712210] sd 6:0:0:0: [sdb] Add. Sense: No additional sense information [19737.712222] end_request: I/O error, dev sdb, sector 0 [19737.712232] Buffer I/O error on device sdb, logical block 0 Neither does the external drive show when I use fdisk: jeroen@phalacrocorax:~$ sudo fdisk -l [sudo] password for jeroen: Disk /dev/sda: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x000341ad Device Boot Start End Blocks Id System /dev/sda1 * 1 18714 150320173+ 83 Linux /dev/sda2 18715 19457 5968147+ 5 Extended /dev/sda5 18715 19457 5968116 82 Linux swap / Solaris` I popped the disk out of the casing put it on a SATA connect internally and then tried the file recovery programs testdisk/photorec and SpinRite, but both failed because they couldn't recognize the external harddisk. Do I have any other options?

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  • What do different patterns mean in Windows 8 file copy dialog

    - by MainMa
    When copying or extracting files, Windows 8 shows the chart with the speed of the operation. I noticed several patterns: Randomness, High speed at the beginning, then low speed during the most part of the operation, Mostly constant speed. 1. Randomness/nice mountains. 2. High speed at the beginning, then low speed during the most part of the operation. 3. Low speed at the beginning, then high speed during the most part of the operation. (Similar to the previous image, but inverted) 3. Mostly constant speed. (Same as previous image, but without the fast start) I'm curious, what each of those patterns mean? Do some indicate that there may be a problem with hard disk performance? Why the nearly constant speed is so rare, even when copying a single large file from and to a spinning drive, or when copying a single large file or a bunch of small files from and to an SSD?

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  • Looking for a fiber optic "switch" or "router" for home use

    - by Shrout1
    The gist of my question: What is a "fiber optic" switch called? I.E. a layer 2 ethernet switch that uses fiber TX and RX connections and sends layer 2 network traffic between the fiber strands that are connected. Can someone purchase a dedicated fiber switch that does not have copper ethernet ports? What is the current average price of a device like this? Not necessarily looking for product endorsements, just information Might not make sense to go this route if it is too cost prohibitive What type of fiber connector is used for terminating a fiber strand into a jack on the wall? Can fiber be "patched" using two jacks and a "patch" cable? Is signal loss a concern with the longest runs at 100-200ft, a patch cable and media converters? The full story: My parents had unterminated fiber optic cable and terminated Cat5e run throughout their home when it was built in 2004. 10 years later the Cat5e isn't providing the throughput that my father needs to accomplish multiple streams of HD and fast system backups throughout the house. He can't reach gigabit speeds across the distance of the Cat5e runs. We are both interested in terminating the fiber connections and using them as high speed "backbones" to copper switches in each room of the house. It would be easy to attain gigabit speeds (or better, eventually) using the fiber. I have searched and searched for a "fiber optic switch" or "fiber optic router" and cannot find the correct term to describe this piece of hardware. We can use fiber media converters at the end points of each connection, however it would be nice to have a "patch panel" set up in the network closet in the basement that has fiber connections on it and switches the ethernet streams between the connections/systems in the house. Each fiber media converter costs between $50-$100 a piece... After 10 or so terminated connections it might make sense to find a piece of hardware that does not require media converters. That would depend upon the cost of this hardware Somewhat unrelated, if we are able to route between these fiber strands successfully, what is the physical connector type used in a jack on the wall? Just like RJ45 has a wall outlet (depicted below): What is the fiber optic equivalent of this? In the interim could we "patch" a couple fiber strands together in the network closet? Would signal loss be of concern with a run length of 100-200 feet, a patch cable and two media converters? If that would work then it could be used until the funds are available for more.

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  • Xampp installation

    - by Bernavi Spain
    I get some troubles when I want to install the xampp tool, I run the command sudo apt-get install xampp and this is what I get in return Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: xampp:i386 : Depends: python-gtk2:i386 but it is not going to be installed Depends: python-glade2:i386 but it is not going to be installed E: Unable to correct problems, you have held broken packages. Im using linux mint maya cinnamon

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  • Why does Windows run CHKDSK on every boot?

    - by khris
    Every time I turn on my PC, I get the following message: Checking file system on E: The type of the file systen is NTFS. One of your disks need to be checked for consistency. You may cancel the disk check, but it is strongly recommended that you continue. Windows will now check the disk. CHKDSK is verifying files (stage 1 of 3)... 0 percent completed I allow CHKDSK to to complete, but Windows does not load. This message appears every time I boot my computer. Could someone explain me why this message appears and what I should do to make it disappear?

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  • Pentium 4 Willamette vs. Faster Celeron Northwood [closed]

    - by Synetech inc.
    Which is the preferable of the following two processors? Intel® Pentium® 4 Processor 1.70 GHz, 256K Cache, 400 MHz FSB Willamette Intel® Celeron® Processor 2.40 GHz, 128K Cache, 400 MHz FSB Northwood Details: A few months ago my motherboard died, so I bought a used computer that had a 2.4GHz Celeron. My old system had a 1.7GHz Pentium 4, so now I’m trying to decide which CPU to use. Obviously a P4 is preferable over a Celeron, but the Celeron is (significantly?) faster than the P4. I’m wondering if the faster Celeron might be better for certain tasks (ie, stronger but dumber is better at some things than smarter but weaker). I tried Googling for some reviews and comparisons for graphs to get a clear depiction of which is better overall, but found nothing that helped. (I did manage to find one page that indicates (apparently by poll, not benchmark) that the Celeron is better.) So which CPU should I use? Does anyone know of some graphs that I can use to compare the two? The system is a general-purpose machine for word-processing, Internet, and casual games (not Crysis, but not Solitaire either). It will be running Windows XP. The board is a 478 with 400MHz FSB.

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  • maemo - n900 - SIP call quality

    - by Walter White
    Hi all, I have been using SIP / VoIP on my n900 to make calls and my problem is after about 15 minutes of talk time, more recently 18 minutes exactly, my connection dies and I can no longer hear them or them me. I have tested this with various VoIP providers to confirm that it is not specific to any one provider, but instead my phone. I also have tested this on my laptop. I sent my phone to be tested at some place that tests hardware and no problems were found with the hardware. What can I do to rectify the 15 minute call barrier with SIP on my phone? The other problem I have too is that for the wireless broadband to start working again, I need to restart the phone, it appears the network driver gets overloaded. The one thing that appears to work fine is making cellular calls. I have yet to have call quality drop off after 15 minutes over a cellular connection. Thanks, Walter

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  • NAS that supports NZB downloading for around £150 ($220) or less (without hard drive)

    - by Jigs
    I have seen a number of NAS's that are around that price, but I am worried that they may not be able to handle the processing of .rar files (I know that can be quite CPU intensive). Does anyone have any experiences with sabnzbd or hellanzb - or similar on their NAS? In terms of features the main requirement is NZB downloading - I am quite flexible on the other features. Wifi support would be nice, but not essential. Torrent downloading would also be nice. One disk drive would probably be enough. Easy installation of application would be nice... but again I am sure I can follow a tutorial.

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  • Merging Two KML Files to Display Them with Different Marker Icons on Google Maps

    - by Maxim Z.
    Let's say that I have two spreadsheets with addresses. I uploaded these spreadsheets into Google Fusion Tables, geocoded the addresses, and exported the results as KML files. Now, I want to take these two KML files and merge them, while maintaining the location data and using it to map the points with Google Maps. Well, I found a way to easily merge the KML files: import both of them into a "My Maps" map with Google Maps! However, my problem is this: when I do that, all of the locations in my data have the same marker icon on the map. From past experience, I know that these markers can be somehow defined inside the KML files. Is it possible to combine these two KML files while giving one's points one marker icon and the other's points another marker icon? Just in case my question is confusing, what I mean, is giving the first set of points blue markers, for example, and the other set of points red markers, so that they can be overlayed.

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  • Windows 7 backup and restore: Is each backup incremental or complete?

    - by Margaret
    I have a computer that's been taking backups using Windows 7's Backup and Restore feature. However, I now need to reclaim hard disk space, and am trying to figure out what I can safely delete. When I go into the Backup and Restore options on the machine, it shows several backups. Is it safe to delete the older ones? Or is it an incremental backup, that means that files not changed since before the last backup would then be lost?

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  • How do I add missing dictionaries for aspell?

    - by Ahmed
    Aspell version: $ aspell -v @(#) International Ispell Version 3.1.20 (but really Aspell 0.60.6) Dump dict yields no results: $ aspell dump dicts First noticed the problem when I did this, was originally working on web server, but someone updated something and it hasn't worked since: $ aspell check temp_test_file.txt Error: No word lists can be found for the language "en_US". What's the proper way of installing the required dictionaries? I believe we're running this on CentOS. And also, /usr/lib/aspell-0.60 does not contain the required dictionaries (provided that they're supposed to be saved there). data-dir: /usr/lib/aspell-0.60

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  • Macbook Pro Triple Boot OS X Lion, Windows 7 and Windows 8

    - by Lloyd Sparkes
    MacBook Pro (Summer 2010 Model, Basic Model) I currently have OS X Lion and Windows 7 running side by side on my MacBook Pro. However I have a need to get Windows 8 running as well in this mix (a Virtual Machine is not good enough, I need the performance). I have created a suitably sized parition (80GB) that is recognizable in Boot Camp. However every time I try to boot from the USB stick (that worked to install Windows 8 on my PC) using the latest version of rEFIt, it just boots Windows 7 and not the Windows 8 installer. I cannot start the installation within Windows 7 as it will just install over Windows 7. I'm guessing the Boot Camp emulation is doing something werid to stop the "Press any key to install Windows..." message from appearing (which should happen if the installer detects Windows is already installed (e.g. if you left your install disk in). Is there a way to get around this / force the installer to start? (Note I cannot start the Windows 7 installer either if I wanted to install a second copy of Windows 7 to upgrade to Windows 8)

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  • Can't type into some text fields in any browser on Windows 7

    - by Zoltán
    I can't type into e.g. facebook's log in form with my computer. I hit my keys, but nothing happens. Special characters like c, c, š, etc. work. Backspace doesn't, delete does. This goes for Internet Explorer, Firefox and Chrome. This also happens with some other sites, sometimes even with gmail (or any google's log in form). I read somewhere that the solution is to reregister some dlls: regsvr32 mshtmled.dll regsvr32 jscript.dll regsvr32 /i mshtml.dll The first two work, the third one says The module "mshtml.dll" was loaded but the entry-point DllRegisterServer.dll was not found. And of course, running just the first two didn't help. Does anyone know how to fix this problem?

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  • Apple Mail in SL using excessive data

    - by user32522
    Hi, I am using Apple Mail on Snow Leopard. It seems to use excessive data, around 1.5 GB a day. I don't receive mails remotely close to that size obviously. Does anybody have any idea what's happening. Its very consistent. Turn Mail off, and the download goes away. Much appreciated.

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  • Excel 2007 - How can I write "use this cell" or IF BLANK "use this cell"?

    - by Mike
    I am trying to show the Days between NOW() and the dates (dd/mm/yy) in, either Column B or Column C - depending which one is NOT blank A B C 29/03/10 01/04/10 29/03/10 02/04/10 29/03/10 30/04/10 29/03/10 31/03/10 29/03/10 03/04/10 I currently have the formaul below and then drag it down, but it obviously means I need to go back and amend the 'errors'. =DAYS360(A1,B1) I always forget how to nest this type of NULL/BLANK thing so any help, or pointers to remember would be appreciated. Thanks Mike

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  • Fried graphics card, how to proceed ?

    - by user19496
    Motherboard: Biostar TPower I45 I fried my graphics card (white smoke), by removing the cable marked PCI-E from the card, and then booting. Removed the graphics card, and now the machine is booting, and I can ping it. However I have no possibility to see what is actually happening, because I can't attach a monitor. Can I workaround the lack of monitor in some way, just to see if the motherboard is fine, attach a cable and telnet in or any other way ? Or, do I have to buy and install a new graphics card to be sure ?

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  • Files built with a makefile are disapearing (including the binary)

    - by Reid
    I am building a program on a TS-7800(SBC), and when I run make (show below), it appears to go through all of the steps normally, but in the end i do not get a binary file. Why is this, and how can I get my file. makefile CC= /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc # compiler options #CFLAGS= -O2 CFLAGS= -mcpu=arm9 #CFLAGS= -pg -Wall # linker LN= $(CC) # linker options LNFLAGS= #LNFLAGS= -pg # extra libraries used in linking (use -l command) LDLIBS= -lpthread # source files SOURCES= HMITelem.c Cpacket.c GPS.c ADC.c Wireless.c Receivers.c CSVReader.c RPM.c RS485.c # include files INCLUDES= Cpacket.h HMITelem.h CSVReader.h RS485.h # object files OBJECTS= HMITelem.o Cpacket.o GPS.o ADC.o Wireless.o Receivers.o CSVReader.o RPM.o RS485.o HMITelem: $(OBJECTS) $(LN) $(LNFLAGS) -o $@ $(OBJECTS) $(LDLIBS) .c.o: $*.c $(CC) $(CFLAGS) -c $*.c RUN : ./HMITelem #clean: # rm -f *.o # rm -f *~ Output root@ts7800:ReidTest# make /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c HMITelem.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c Cpacket.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c GPS.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c ADC.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c Wireless.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c Receivers.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c CSVReader.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c RPM.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -mcpu=arm9 -c RS485.c /home/eclipse/ReidTest/cc/cross-toolchains/arm-none-linux-gnueabi/bin/arm-none-linux-gnueabi-gcc -o HMITelem HMITelem.o Cpacket.o GPS.o ADC.o Wireless.o Receivers.o CSVReader.o RPM.o RS485.o -lpthread Thank you.

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  • Virtual Box state not saving upon restart/reset/shutdown - reverting to an earlier state

    - by user638756
    Every time I restart/shut down my VM in VirtualBox (image is Ubuntu 10.02), whenever I start it back up, it reverts to the state it was in after I installed Guest Additions. This is extremely frustrating as every time I make progress on a project, whenever it restarts (mostly from crashing), I have to redo mostly everything. Is this a known problem with Guest Additions or with Virtual Box in general, and if so is there some solution?

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  • Stop yahoo from opeing in second tab when opening chrome

    - by sam
    I recently downloaded Vuze (torrent client), which as well as installing, installs a whole bunch of rubbish toolbars (mostly by an outfit called 'Spigot') and tries to change your default search engine to Yahoo. In Safari and Firefox, ive managed to change it back but i Chrome although ive deleted all the addons and restored my default search engine when ever i open up Chrome i get two tabs 1) my default homepage and 2) yahoo search page. Any idea were i can disable this Yahoo search page, ive looked in the settings but could find any where obvious (ive set back my default search engine to Google and deleted any add ons) but this still dosnt do it.. any ideas ? My last resort is to do a factory reset of Chrome, which i dont want to do as i have all my settings in there.

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