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• Hardware advice for bitmap / openGL image processing server?

  - by pdizz

  I am trying to work out a build for a processing server to handle bitmap processing as well as openGL rendering for chroma-keying images and Photoshop automation. My searches here and on Google have turned up surprisingly few results, and seeing that there aren't tags for bitmap or image processing I take it this is a specialized application. The bitmap processing is very cpu-intensive while the chroma-keying and Photoshop stuff is gpu-intensive. I doubt this is a case of over-optimization as our company batches thousands of images a day (currently on individual workstations) and any saving in processing time and workstation down-time would be beneficial. Does anyone have any experience with this type of processing server? Any special considerations that would go into a build like this or am I over-thinking it?

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• Report: Netbook Ubuntu: Web Client or Real Computer?

  Now that Ubuntu founder Mark Shuttleworth is devoting his full energies to desktop design, the changes are coming thick and fast. But are these new designs based on flawed assumptions? Is Ubuntu forking GNOME?

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• Integrating external computer into a domain - some recommendations please

  - by TomTom

  Given: * A multi loation company. Every office has local routers that connect to a central VPN capable rouer in a data center. All fine so far. We now need to move a computer off site into a hosting center across the globe, to get it closer to some supplier computers we work for. it will run limited logic but latency is important, and our latency so far is too large. This computer will be in a data center and does no require incoming connections except for adminsitrative purposes, although it needs outgoing connetions. I have no real chance to put one of my VPN routers there, sadly - otherwise I would have no problem. Usage of RRAs is not recommended (we had various probblems there over time). I could deal with it. The computer MUSt integrate into the corporate structure via VPN and join the domain and be fully "tracked" (controlled for performance). What is the best suggestion? So far it looks like my best bets woudl be to log in via RRAS and deal with whatever issues arise there plus uise the local firewall the limit incoming connections to this computer to what is needed (which runs down to an emergency RDP connection allowance). Anyone a better idea?

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• Can't sync filesystem without reboot

  - by Fabio

  I'm having an issue with a linux server. Once a week the running mysql instance hangs and there is no way to fully stop it. If I kill it, it remains in zombie status and init does not reap its pid. The server is used for staging deployments and some internal tools, so it's not under heavy load. The only process constantly used id mysql and for this I think that it's the only process which suffer of this issue. I've searched system logs for errors and the only thing I found is this error (repeated a couple of times) in dmesg output: [706560.640085] INFO: task mysqld:31965 blocked for more than 120 seconds. [706560.640198] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [706560.640312] mysqld D ffff88032fd93f40 0 31965 1 0x00000000 [706560.640317] ffff880242a27d18 0000000000000086 ffff88031a50dd00 ffff880242a27fd8 [706560.640321] ffff880242a27fd8 ffff880242a27fd8 ffff88031e549740 ffff88031a50dd00 [706560.640325] ffff88031a50dd00 ffff88032fd947f8 0000000000000002 ffffffff8112f250 [706560.640328] Call Trace: [706560.640338] [<ffffffff8112f250>] ? __lock_page+0x70/0x70 [706560.640344] [<ffffffff816cb1b9>] schedule+0x29/0x70 [706560.640347] [<ffffffff816cb28f>] io_schedule+0x8f/0xd0 [706560.640350] [<ffffffff8112f25e>] sleep_on_page+0xe/0x20 [706560.640353] [<ffffffff816c9900>] __wait_on_bit+0x60/0x90 [706560.640356] [<ffffffff8112f390>] wait_on_page_bit+0x80/0x90 [706560.640360] [<ffffffff8107dce0>] ? autoremove_wake_function+0x40/0x40 [706560.640363] [<ffffffff8112f891>] filemap_fdatawait_range+0x101/0x190 [706560.640366] [<ffffffff81130975>] filemap_write_and_wait_range+0x65/0x70 [706560.640371] [<ffffffff8122e441>] ext4_sync_file+0x71/0x320 [706560.640376] [<ffffffff811c3e6d>] do_fsync+0x5d/0x90 [706560.640379] [<ffffffff811c40d0>] sys_fsync+0x10/0x20 [706560.640383] [<ffffffff816d495d>] system_call_fastpath+0x1a/0x1f When this happens the only way to make everything working again is a full reboot, but in order to do that I'm forced to use this command after I've manually stopped all running processes echo b > /proc/sysrq-trigger otherwise normal reboot process hangs forever. I've tracked reboots script and I've found out that also the reboot process hangs on a sync call, this one in /etc/init.d/sendsigs (I'm on ubuntu) # Flush the kernel I/O buffer before we start to kill # processes, to make sure the IO of already stopped services to # not slow down the remaining processes to a point where they # are accidentily killed with SIGKILL because they did not # manage to shut down in time. sync I'm almost sure that the cause of this is an hardware issue (the RAID controller???) also because I've other two machines with the same hardware and software configuration and they don't suffer of this, but I can't find any hint in syslog or dmesg. I've also installed smartmontools and mcelog packages but none of them did report any issue. What can I do to track the cause of this issue? Today is happened again, here is the status of system after triggering a reboot init---console-kit-dae---64*[{console-kit-dae}] +-dbus-daemon +-mcelog +-mysqld---{mysqld} +-newrelic-daemon---newrelic-daemon---11*[{newrelic-daemon}] +-ntpd +-polkitd---{polkitd} +-python3 +-rpc.idmapd +-rpc.statd +-rpcbind +-sh---rc---S20sendsigs---sync +-smartd +-snmpd +-sshd---sshd---zsh---sudo---zsh---pstree +-sshd---sshd---zsh---sudo---zsh And here is the status of sync process # ps aux | grep sync root 3637 0.1 0.0 4352 372 ? D 05:53 0:00 sync i.e. Uninterruptible sleep... Hardware specs as reported by lshw I think the raid controller is a fake raid. I usually don't deal with hardware (and for the record I don't have physical access to it) description: Computer product: X7DBP () vendor: Supermicro version: 0123456789 serial: 0123456789 width: 64 bits capabilities: smbios-2.4 dmi-2.4 vsyscall32 configuration: administrator_password=disabled boot=normal frontpanel_password=unknown keyboard_password=unknown power-on_password=disabled uuid=53D19F64-D663-A017-8922-0030487C1FEE *-core description: Motherboard product: X7DBP vendor: Supermicro physical id: 0 version: PCB Version serial: 0123456789 *-firmware description: BIOS vendor: Phoenix Technologies LTD physical id: 0 version: 6.00 date: 05/29/2007 size: 106KiB capacity: 960KiB capabilities: pci pnp upgrade shadowing escd cdboot bootselect edd int13floppy2880 acpi usb ls120boot zipboot biosbootspecification *-storage description: RAID bus controller product: 631xESB/632xESB SATA RAID Controller vendor: Intel Corporation physical id: 1f.2 bus info: pci@0000:00:1f.2 version: 09 width: 32 bits clock: 66MHz capabilities: storage pm bus_master cap_list configuration: driver=ahci latency=0 resources: irq:19 ioport:18a0(size=8) ioport:1874(size=4) ioport:1878(size=8) ioport:1870(size=4) ioport:1880(size=32) memory:d8500400-d85007ff

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• Windows 7 detects my 1 TB disk as a disk with only 31 MB space

  - by ZelluX

  I've added another 1 TB Western Digital disk on my computer (there is a disk with 250 GB already), and after booting to Windows 7, it recognise the disk, but in the Disk Management panel, it says the disk has only 31 MB TOTAL space, so is what it shows in the EVEREST information. And when I rebooted the computer and entered BIOS, it said the new disk has 0 MB disk capacity. Is there any way to fix this problem?

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• USB wiped itself but still showing that its full?

  - by Brian Takan

  My Data saved from laptop to usb, and then I pulled it out, then something popped up on the screen saying that it was full and that I needed to delete stuff, so I put the USB back in and went to computer and all to go into it and when I did it isn't showing anything on the usb but when I go to computer it still shows that the usb is full. Does anybody know what is going on ? How can I get my data again?

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• Is surge protection actually needed?

  - by andrew

  Am I am an idiot for not using a surge protected powerboard? Does this mean my computer gets fried in a power outage? Which particular parts of the computer are most vulnerable to damage if I get a 'surge'? Sorry for being a newb.

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• What is the probable failure - no BSOD, no event log, monitors sleeping, force reboot required

  - by Tyler

  Every 3 to 15 days, my PC freezes. This typically happens when the computer is idle, I'm coming home from work, back from vacation, etc. It's never happened while using my computer. The monitors are in power save mode The Caps Lock light on the (wireless) keyboard doesn't work Ctrl-alt-del has no effect, mouse (wireless) has no effect The hardware reset button and single press of power putton have no effect Computer does not appear on the network No BSOD, no memory dump Event logs have no errors or indications of problems near the time of crash. Only messages after reboot indicating that there was a reboot without a clean shutdown. Windows is set to never put the computer to sleep (just the display) Here are the vital stats of the build: OS Windows 8 Pro 64-bit CPU Intel i5-2400 Mobo Intel BOXDP67DE Micro ATX GPU MSI N460GTX Cyclone768D5/OC RAM CORSAIR XMS3 8GB (2 x 4GB) CMX8GX3M2A1333C9 PSU SeaSonic X Series X650 Gold System Drive Samsung 840 Pro 256 GB SSD Data Drive 2 x Western Digital WD20EARS 2TB in hardware RAID 1 Optical Lite-On DVD burner IHAS424-98 And here is the story of how the problem developed and what I've done to diagnose: January 2011, system built with Windows 7 64-bit, runs great. March 2011, Intel replaced the mobo because of the bad sata controllers. October 2012, upgrade to Windows 8 (problems start shortly after). January 2013, system freezes and causes network to fail for the whole house. Unplug the network cable and other devices and PCs can use the internet. Plug it back in, internet goes away for everyone. Reboot and everything is fine. March 2013, install Intel Gigabit CT PCI-E NIC, disable mobo nic in bios. Network strangeness goes away. Freezes are less frequent. Memtest shows no problems (20 passes). Early June 2013, replace Antec PSU with SeaSonic PSU. Mid June 2013, replace OCZ Vertex 2 SSD with Samsung SSD. Late June 2013, get frustrated and hope the community has some good ideas (I'm running out of budget to replace parts). My next plan of attack is setting "Turn off display" to Never and using a screen saver to see how that reacts on the next freeze. It makes me sad to waste power for up to 15 days though. Has anyone out there seen a problem like this? Any ideas on what kind of malfunction would act this way? Ideas of other diagnostic steps to take?

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• What's the difference between multicore proc and multiproc system?

  - by bAN

  Hi!! I wonder what's the difference between a dual core computer and a computer with 2 processors on the mother board.. I think it's something related with the threads but a i don't understand very well.. Thanks for your interest.

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• Advice for upcoming computer science student

  - by kakadoodles

  Next school year I will taking up Computer Science and I will start to learn computer programming. Except here what other site should I visit for Computer Science or computer programming.

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• Getting a VMnet0 error in VMWare workstation after updating host computer from Windows 8 to 8.1

  - by Andrew

  Yesterday, I updated my computer from Windows 8 to 8.1. I have VMWare Workstation 10 running Windows XP on this computer and prior to the update I had no issues connecting to my network. However, since updating, I haven't been able to connect to any network and I'm getting the following error: "The network bridge on device VMnet0 is not running. The firtual machine will not be able to communicate with the host or with other machines on your network. Failed to connect virtual device Ethernet0" I've checked all of my settings which currently have my network adapter set for a bridged connection and under device status "connected" is checked. Not really sure where to go from here, but after doing some research I have seen that others users have reported getting this error when updating the OS (any OS, not windows 8 specifically) of the host computer. Thanks in advance to anyone who can help.

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• Purpose of "computer" section in MySQL Cluster 7.2?

  - by dpk

  According to the cluster documentation, you can either define data nodes with: [ndbd] NodeId=n HostName=1.2.3.4 or [ndbd] NodeId=n ExecuteOnComputer=m [computer] Id=m HostName=1.2.3.4 I don't see a substantial difference between the two. The documentation has this to say: The [computer] section has no real significance other than serving as a way to avoid the need of defining host names for each node in the system. I'm stumped. If I have to define a hostname, what benefit is there to defining it in [computer] instead of [ndbd]?

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• INtegral card readers have drivers installed but do not show on my computer

  - by Santiago Berniz

  I recenlty fixed a computer powerbutton and accidentally unplugged a sd card reader and did not know where was at (didnt knw if it was usb or firewire/ after i found out, i guess i installed it on a different usb so reinstalled the drivers..Drivers show installed successfully, ready to use. but THey do not show up on my computer as removable disks (E:) etc.a s they should I have windows 7 home premium 64 bits. the computer is a Acer Aspire M1201-be50001a. I tried following the installation and they show up while installing and then hide again. Any help is appreciated Thanks in advance.

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• How to find last login user on given computer name on AD

  - by user1215305

  If anyone could help, it would be appreciated. I am trying to audit the network. I have list of computers that are active in last 3 months in domain. I have little script that run when user login to the computer and writes the file with computer name. I have 39 computers and only on 23 computers the script was run. So I am chasing up with other 16 computers. My question is how can I find out who has last login to the given computer name? Many thanks in advance

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• Network attached external harddrive from another computer.

  - by Paul Knopf

  I have a server that is setup in raid. It is on the same network as my main computer. I would like to have some of the memory on my server to act as a network attached drive on my main computer. Basically, I want it to be a new data drive (similar two C:\, but 2nd drives are mostly E:). That way, I can reformat my main computer without loosing any important data. And the data that is saved (on server E:\ drive) is secured via raid mirroring.

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• How is time measured in computer systems?

  - by DRK3

  Something I have been puzzled about is this: how exactly does a computer regulate and tell time? For example: if I were to write a program that did this: Do 2+2 then wait 5 seconds How does the processor know what "5 seconds" is? How is time measured in computer systems? Is there a specific chip for that sole purpose? How does it work? Thanks for any replies; I'm really interested in computer science, and would love any help you could give me =D.

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• where to look for computer technician jobs

  - by Kareem

  Hi I am currently studying for the A+ certification, I plan to have it by the end of this month and I plan to go for farther education. I’ve built two high end computers by myself for a friend and family member. Install OS and everything. I’m looking in to finding either a computer assembly or computer technician job . Where is the best place to look for one? I’ve looked in to best buy but I find their geek squad to be a little bit shady. Where is a good place to look for a full time entry level computer technician job just starting out in Tampa, FL?

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• Connect to virtual host computer from within virtualbox

  - by Nicky De Maeyer

  I'm currently developing on an ubuntu karmic. For this I've installed lampp with a virtual host on apache so http://myproject/ is mapped to my project's root directory. Now to test the website in IE I've installed an XP machine on a virtualBox OSE. Ive managed to get the virtual host working on the XP by adding its to the hostfile, like this: 255.255.255.255 myproject where 255.255.255.255 is the ip adress of the host computer (my ubuntu). Now every day when I come to work and plug in my computer to the network, my IP has changed. so When i boot the XP I have to change the IP in the hostfile to my new IP. Is there any way where I can set the ip to somthing the XP will recognise as the host machine? I've tried replacing the IP in the hostfile by the host computer name, but that does not seem to work... This would make my like a bit easier :)

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• Computer becomes very slow (permanently) after running a bunch of apps

  - by djzmo

  Hello there, My computer with Windows XP installed becomes very slow after I ran some heavy tasks at a time. (play a full 3D online game while extracting a 4GB RAR archive) It freezes for about 200~500ms every few seconds, and this always happens if I do heavy tasks at once in my computer (for example, installing a program while playing games), and the lag remains permanently (even a reboot won't make it better) unless I repair-install the Windows. Since I have a low-end computer: Intel(R) Pentium(R) 4 CPU 2.00 GHz, 512 MB of RAM ATI RADEON 9550 AGP 256 MB And the only way I used everytime to fix this problem is by repair-installing my Windows XP. So that I won't lose any data or installed programs. But I believe there's a better and faster way to fix this without repair-installing the Windows. Any idea?

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• My computer keeps crashing and I just want it FIXED

  - by xabaddon

  So long story short, I had my brother build me a computer for my birthday last year. I saw how good his was (also built by him) so I decided I would have him build me one. About a month after this was all finished, my computer started crashing when I when run over 3 programs. For example, an online game, a music player (spotify), skype, and a browser with a few tabs open. The way it would crash is the screen will freeze and a buzzing noise will come from whatever audio device I am using (headset, speakers) I took it to a computer tech guy and he told me my cooling system was inadequate. SOOO he led me to buy a CORSAIR H75 Liquid cooling system. Everything was good for about a week, and now it just did the same thing again. I am so freaking over this guys and I really need some help figuring out what the heck is wrong, I dont care how long it takes, just please help me.

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• Computer Flashes Out?

  - by GuyNoir

  We have a strange problem with our computers at my school. They are all Latitude 2100 Netbooks. At random points (I can't seem to find a pattern) the screen will turn a single color (red, green, black, brown, etc.) To fix this, the computer must be put to sleep, and brought back up. They have integrated graphics, but I can't imagine that if it was a bug with the computer itself, that every single computer would do this. Is there any way I could find out the problem that's causing this. Some diagnostic tool? Thanks. Edit: Forgot, they all have windows.

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• Access Other Computer via ADSL Modem and Router

  - by Sohail

  My network configuration is like this ISP - Modem - Router - Computer and the same goes for my friend. We want to share large files or to access each other's computer. The Passwords to login to the web page of each other modems are known. I mean, we can access each other Modem Web GUI easily ( because we know the WAN IP of each other modem ). The question is how do i access his or how do he access my computer? Is there any way to do so. Remote desktop connection is not working :( Please help

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• Put a Windows computer to sleep remotely (from a Linux box)

  - by snark

  I'd like to have my Linux box (a QNAP TS-210 NAS) send the order to go to sleep (or hibernation) to my main Windows 7 computer. As the NAS is running Linux, I can't use psshutdown from SysInternals' PsTools. Is there any Linux equivalent? Or some "magic packet" that can order the Win7 computer to sleep. I know I could install a SSH daemon and trigger a shutdown command from the Linux box using ssh, but ideally I do not want to install anything on the Win7 computer. I can install Linux software on the NAS, no problem about this. PHP, python and perl are also available on it.

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• Accessing the physical IP address of a computer on my network that is no longer available

  - by floebs

  I'm trying to find out how to access the IP address of a computer (macbook pro) that I once had on my network at home. Does terminal store the 'connected' or 'linked' computer ID or IP of a networked computer anywhere that I can access after the laptop is no-longer within range? The laptop was part of my airport extreme network, its now out of range (stolen!), and I would like to know if its possible to discover the physical address of that laptop, even though I no-longer have physical access to the laptop. I have my airport extreme configured (somewhere??) to sniff out that laptop if it comes within range, and then connect to it. Where would this 'configured info' be stored on my desktop?

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• How come I can't ping my home computer?

  - by bikefixxer

  I'm trying to set up a vpn into my home computer in order to access files from wherever. I have the home computer set up with a no-ip dynamic dns program so I can always connect, and have also tried using the actual ip address. However, when I try to connect or even ping from anywhere outside of my house I can't get through. I've tried putting that particular computer in the dmz, turned off the computers firewall and anti-virus, and I still don't get anything. I have comcast as my home internet provider. I have also tried from two different locations. Are there any other solutions I can try or is comcast the issue? I used to be able to do this when I ran a small web server at home for fun but now nothing works. Thanks in advance for any suggestions!

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