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  • How are interrupts handled by dual processor machines?

    - by jeffD
    I have an idea of how interrupts are handled by a dual core CPU. I was wondering about how interrupt handling is implemented on a board with more than one physical processor. Is any of the interrupt responsibility determined by the physical board's configuration? Each processor must be able to handle some types of interrupts, like disk I/O. Unless there is some circuitry to manage and dispatch interrupts to the appropriate processor? My guess is that the scheme must be processor neutral, so that any processor and core can run the interrupt handler. If a core is waiting on a disk read, will that core be the one to run the interrupt handler when the disk is ready?

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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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  • MySQL dual license behavior

    - by jromero
    Hi SO, I'm running a commercial(closed source) Web App development for the first time. Initially I considered MySQL the most feasible option for a DB, until I get quite confused about its dual license behavior. If I want a commercial application do I still can use the GPL version of MySQL or I must get a license? The same question in a different way: If I use MySQL's GPL version does that force me to license the whole app under GPL? Either case I would go with PostgreSQL, I just want to make really really sure about this. Even in SO I've seen related("duplicates") questions but never a clear answer... All other tools I'm gonna use to code the project are licensed under BSD or MIT. Just in case, the role of MySQL in the project is merely as relational DB to store persistent data and query it. I'd really appreciate if someone can clarify this for me. Regards, thanks in advanced.

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  • My multithread program works slowly or appear deadlock on dual core machine, please help

    - by Shangping Guo
    I have a program with several threads, one thread will change a global when it exits itself and the other thread will repeatedly poll the global. No any protection on the globals. The program works fine on uni-processor. On dual core machine, it works for a while and then halt either on Sleep(0) or SuspendThread(). Would anyone be able to help me out on this? The code would be like this: Thread 1: do something... while(1) { ..... flag_thread1_running=false; SuspendThread(GetCurrentThread()); continue; } Thread 2 .... while(flag_thread1_running==false) Sleep(0); ....

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  • Application that will identify percentage of your system disk bandwidth used on a user-application by user-application basis?

    - by Warren P
    I always (subjectively) feel my computer is far too slow (however fast it is), and so I'm always looking for ways to measure and understand what my computer is actually doing, that is making it seem "slow" to me. It has been my observation that my software-developer workload is most often disk-bound (I am waiting for Disk I/O) more than CPU bound. What has made it worse, is that I am using a corporate PC that has in-memory active-scanning anti-virus software that I do not have control over, and also some IT department mandated services that seem to suck up a lot of available hard-disk bandwidth. The best tool I have seen (in Windows 7) is the Resource Monitor which I usually acess from the button in the task Manager. The disk IO page, however, seems to label Disk Activity at a very low level (for example, showing the Volume Shadow Storage, which is flushing information obviously written by something ELSE other than VSS itself, and then writes to Pagefile.sys, which are obviously due to Virtual Memory faults in some application). What I would like to know is if a utility exists that can add up all direct disk input and output by user-level process, or find the process or service that caused VM or VSS activity. In that way, I hope, you could establish a real idea of how much of your computer's precious disk subsystem bandwidth is attributable to a particular application. here's a scenario: MyApp.exe writes 100k/s and reads 100k/s directly. VSS ends up writing another 100k/s. pagefaults caused inside MyApp.exe cause another 100k/s of writes. So the total "cost" of MyApp.exe running, during a period of time (let's say 1 second) is 400k/s, whereas you can only directly observe half of that, in Resource Monitor. Is there a smarter disk-IO watching piece of software I can use?

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  • Have programmers at your work not taken up or been averse to an offer of a second monitor?

    - by Chris Knight
    I'm putting together a business case for the developers in my company to get a second monitor. After my own experiences and research, this seems a no-brainer to me in terms of increasing productivity and morale/happiness. One question which has niggled me is if I should be pushing to get all developers onto a second monitor or let folk opt-in (i.e. they get one if they want one). Thoughts on this are welcome, but my specific question relates to a snippet on this site: But when the IT manager at Thibeault's company asked other employees if they wanted dual monitors last year, few jumped at the offer. Blinded by my own pre-judgement, this surprised me. Has anyone else experienced this? I fully appreciate that some people prefer a single larger monitor, but my general experience of researching the web suggests that most programmers prefer a dual (or more) setup. I'm guessing this should be tempered with the thought that those developers who contribute to such discussions might not be considered your average developer who might not care one way or the other. Anyway, if you have experienced the above have you tried to sell the concept of dual monitors to the masses? If everyone just got 2 monitors regardless if they wanted it or not, were there adverse reactions or negative effects? UPDATE: The developers are on a mixture of 17", 22", or 24" single monitors. The desks should be able to accommodate dual 22" monitors as I am proposing, though this will take some getting used to I imagine.

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  • What problem does double or triple buffering solve in modern games?

    - by krokvskrok
    I want to check if my understanding of the causes for using double (or triple) buffering is correct: A monitor with 60Hz refresh's the monitor-display 60 times per second. If the monitor refresh the monitor-display, he updates pixel for pixel and line for line. The monitor requests the color values for the pixels from the video memory. If I run now a game, then this game is constantly manipulating this video memory. If this game don't use a buffer strategy (double buffering etc.) then the following problem can happen: The monitor is now refreshing his monitor-display. At this moment the monitor had refreshed the first half monitor-display already. At the same time, the game had manipulated the video memory with new data. Now the monitor accesses for the second half monitor-display this new manipulated data from the video memory. The problems can be tearing or flickering. Is my understanding of cases of using buffer strategy correct? Are there other reasons?

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  • How to get to the GRUB menu at boot-time, on a single-boot system (not dual-boot)?

    - by fred.bear
    This issue came up recently for me (and I've been prompted to lodge it as a specific question about it): My system is not dual-boot, I run a standard Ubuntu desktop system "on the metal" (I think running it in a VM is the same). Pressing "C" while booting does not cause the GRUB menu to appear (which I believe it does for a dual-boot system). How can I get the GRUB-menu to present itself on a single-boot system?

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  • SQL SERVER The Difference between Dual Core vs. Core 2 Duo

    I have decided that I would not write on this subject until I have received a total of 25 questions on this subject. Here are a few questions from the list: Questions: What is the difference between Dual Core and Core 2 Duo? Which one is recommended for SQL Server: Core 2 Duo or Dual [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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  • Laptop LCD sometimes stops working on reboot. Please help.

    - by J Ringle
    I have a Gateway P-6831FX Laptop with Vista Ultimate. The Laptop LCD will sometimes not come on after I reboot the computer. I don't even close the lid and it happens. It isn't dim, it doesn't come on at all. No posting of CMOS (BIOS), nothing. Please note... this happens sometimes, not every time. Frustrating! When plugged into an external monitor, which works fine, Vista display properties can't even "sense" the laptop LCD. I try to enable the laptop LCD for dual display, turning on the laptop LCD, and it does nothing. It's like the laptop LCD is not even there. Manually taking a magnet in my hand to the laptop lid sensing switch (the sensor that turns off display/sleep mode when you close lid), sometimes causes the LCD backlight to "turn on" but not display any images. By "turn on" I mean I can see the screen backlight turn on to a 'dark gray' screen instead of pitch black. Subsequent reboot the laptop display is not working again! Here are the facts: Only happens at random and only after a reboot. Waking from Sleep mode isn't a problem. Pressing F4 function key for dual display does nothing when this happens. Closing lid doesn't seem to be related. (unless it is only after reboot.) using external magnet from laptop screen sensor sometimes triggers backlight to turn on but reboot back to square one with no LCD display. an external display always works fine. I have taken apart LCD, checked all wires and ribbons for loose connections or damage. I have replaced the Inverter. It doesn't seem to be heat related as I can put in sleep mode and resume fine when very hot. (external monitor works fine too). Sometimes the screen works fine as if there is not a problem at all. Even after a reboot... This is random. Any ideas out there? If it is a bad part... which one? The LCD seems to be fine. What are the odds of 2 bad inverters? The backlight is fine. The LCD wires/ribbons seem to be fine. I am at a loss. No warranty left and Gateway tech support is clueless. Thanks for any feedback that might help.

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  • Memcached Debuging/Server Logs Monitor the Memcached Servers?

    - by user1179459
    I have chat engine which is based on the Memcached variables, putting them into arrays and reading them in other end via jquery, which works fine 95% of the times, however when the server load is high memcached (presume its the memcached) the crash and browser gets stucks up. I dont think its jquery issue since this only happens when the server load is very high. I need a way to monitor the memcached servers or somehow write a log file into where the fails/errors comes in... Any idea on how i can do this ? or any idea why memcached servers fails ? I run the memcached as follows $GLOBALS['MemCached'] = FALSE; $GLOBALS['MemCached'] = new Memcache; $GLOBALS['MemCached']->pconnect('localhost', 11211); My memcached config is as follows #! /bin/sh # # chkconfig: - 55 45 # description: The memcached daemon is a network memory cache service. # processname: memcached # config: /etc/sysconfig/memcached # pidfile: /var/run/memcached/memcached.pid # Standard LSB functions #. /lib/lsb/init-functions # Source function library. . /etc/init.d/functions PORT=11211 USER=memcached MAXCONN=1024 CACHESIZE=128 OPTIONS="" if [ -f /etc/sysconfig/memcached ];then . /etc/sysconfig/memcached fi # Check that networking is up. . /etc/sysconfig/network if [ "$NETWORKING" = "no" ] then exit 0 fi RETVAL=0 prog="memcached" pidfile=${PIDFILE-/var/run/memcached/memcached.pid} lockfile=${LOCKFILE-/var/lock/subsys/memcached} start () { echo -n $"Starting $prog: " # Ensure that /var/run/memcached has proper permissions if [ "`stat -c %U /var/run/memcached`" != "$USER" ]; then chown $USER /var/run/memcached fi daemon --pidfile ${pidfile} memcached -d -p $PORT -u $USER -m $CACHESIZE -c $MAXCONN -P ${pidfile} $OPTIONS RETVAL=$? echo [ $RETVAL -eq 0 ] && touch ${lockfile} } stop () { echo -n $"Stopping $prog: " killproc -p ${pidfile} /usr/bin/memcached RETVAL=$? echo if [ $RETVAL -eq 0 ] ; then rm -f ${lockfile} ${pidfile} fi } restart () { stop start } # See how we were called. case "$1" in start) start ;; stop) stop ;; status) status -p ${pidfile} memcached RETVAL=$? ;; restart|reload|force-reload) restart ;; condrestart|try-restart) [ -f ${lockfile} ] && restart || : ;; *) echo $"Usage: $0 {start|stop|status|restart|reload|force-reload|condrestart|try-restart}" RETVAL=2 ;; esac exit $RETVAL

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  • Triple (3) Monitors under Linux

    - by widgisoft
    I have a 3 monitor setup (each 1680x1050) via an Nvidia NVS440 (2 GPUs, 2 outputs per GPU totalling 4 outputs); this works fine under Windows XP,7 but caused considerable headaches under Linux (Ubuntu 9.04). I had previously used an XFX 9600GT and the onboard XFX 9300GS to produce the same result but the card was noisy and power hungry and I was hoping that there was some magical switch in the NVS4400 that got rid of this annoying problem - turns out the NVS440 is just 2 cards on one physical PCB :-p (I searched the net high and low for people using this card under Linux but found nothing, if anything the card uses less power and is fan less so I was to benefit from it either way) Anyway, using either set up there were 5 solutions available: Have 3 separate X instances, all un joined Have 3 separate X instances, adjoined by Xinerama Have 2 separate X instances - One using twin-view, both adjoined by Xinerama Have 2 separate X instances - One using twin-view but no Xinerama Have a single Twin-view setup and leave the 3rd screen unplugged :-p The 4rd option, using 2 separate X instances and twinview (but no xinerama) was the best balance in terms of performance and usability but caused 2 really annoying issues You couldn't control (without altering the shortcuts) which screen an application opened onto - and once it was opened you couldn't move it to another screen without opening up terminal and forcing it to move Nvidia's overriding or falsifying of Xinerama breaks and the 2 screens joined by Twin view behave like a single huge screen causing popups to open in the middle of both screens and maximising of windows stretches to the width of the first 2 screens Firefox can only run one instance as the same user so having multiple firefox windows requires at least 2 users The second option "feels" like the right option, but OpenGL is basically disabled and playing any sort of game or even running anything graphical causes a huge performance drop and instability - even trying to run a basic emulator for gba or gens just causes the system to fall over. It works just enough to stare at your desktop and do nothing but as soon as you start doing some work - opening windows, dragging things around - running multiple copies of firefox it just really feels slow. The last open, only going dual screen works perfectly and everything performs as required, full GPU acceleration - two logical screen spaces - perfect, just make it work across GPUs like windows! :-p Anyway, I know RandR was supposed to pick up the slack when it would introduced GPU objects of sorts to allow multiple GPUs to be stitched together to create one huge desktop at a much deeper layer than Xinerama. I was wondering if this has now been fixed (I noticed X server 1.7 is out) and whether anyone has got it running successfully? Again, my requirements are: One huge desktop to drag any window across Maximising of windows to each screen (as XP does) Running fullscreen apps on the primary screen and disabling the mouse from moving onto the others or on all 3 stretched Finally as a side note; I am aware of the Matrox triple (and dual) head splitter but even the price they go for on eBay is more than I can afford atm, my argument: I shouldn't have to buy extra hardware to get something to work on Linux when it's something that's existed in the windows world for a long time (can you tell I don't get on with X :-p); If I had the cash I'd have bought the latest version of this box already (the new version finally supports large resolutions as the displays I have 1680x1050 each).

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  • DockbarX inside AWN, preview window shifted on dual-screen after shifting from single-screen.

    - by naaronne
    I've been running dockbarx in AWN for sometime now. I started using dual-screens and started seeing a problem with the window preview. When I hover over the dockbarx icon to see the preview it appears on the other monitor. I'm assuming that this is due to it still thinking there is only one monitor. I was hoping someone new of a gconf-editor setting that I could set with the rest of my screen that changes my laptop from internal monitor to my dual-screen setup. Thanks in advance.

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  • Programmatic resource monitoring per process in Linux

    - by tuxx
    Hi, I want to know if there is an efficient solution to monitor a process resource consumption (cpu, memory, network bandwidth) in Linux. I want to write a daemon in C++ that does this monitoring for some given PIDs. From what I know, the classic solution is to periodically read the information from /proc, but this doesn't seem the most efficient way (it involves many system calls). For example to monitor the memory usage every second for 50 processes, I have to open, read and close 50 files (that means 150 system calls) every second from /proc. Not to mention the parsing involved when reading these files. Another problem is the network bandwidth consumption: this cannot be easily computed for each process I want to monitor. The solution adopted by NetHogs involves a pretty high overhead in my opinion: it captures and analyzes every packet using libpcap, then for each packet the local port is determined and searched in /proc to find the corresponding process. Do you know if there are more efficient alternatives to these methods presented or any libraries that deal with this problems?

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  • SCOM 2012 DNS Forwarder Availability Monitor

    - by Massimo
    Background: I have an environment with two different AD domains, each in its own forest, each with two Windows Server 2008 R2 domain controllers acting as DNS servers. There is no trust between the domains. Each DNS server manages the main DNS zone for its AD domain, and then some other zones, including the reverse lookup zone for its IP subnets; all zones are AD-integrated; all DNS servers which manages a zone are correctly listed as authoritative name servers for that zone. So, the situation is like this (using fake names and IP addresses): Domain A: DNS domain: a.dom IP subnet: 192.168.1.X DC/DNS Servers: serverA1.a.dom (192.168.1.1) and serverA2.a.dom (192.168.1.2) Authoritative zones: a.dom, 1.168.192.in-addr.arpa, somezone.local Domain B: DNS domain: b.dom IP subnet: 10.0.0.X DC/DNS Servers: serverB1.b.dom (10.0.0.1) and serverB2.b.dom (10.0.0.2) Authoritative zones: b.dom, 0.0.10.in-addr.arpa, someotherzone.local DNS servers in domain A have conditional forwarders defined for each zone managed by DNS servers in domain B, forwarding to both domain B's DNS servers; DNS servers in domain B have the opposite configuration. All forwarders are stored in Active Directory. All is working perfectly, and computers in each domain can resolve forward and reverse DNS queries for both domains, using their domain's DNS servers. The problem: I have SCOM 2012 deployed in domain A, with the SCOM agent installed on both DCs; the management packs for Active Directory and DNS Server are installed and up-to-date. I have a series of alerts like the following ones on both domain controllers; each alert is generated for each forwarded zone and for each forwarded server: Forwarder someotherzone.local (10.0.0.1) cannot resolve the host name 192.168.1.1,someotherzone.local for serverA1.a.dom Forwarder someotherzone.local (10.0.0.2) cannot resolve the host name 192.168.1.1,someotherzone.local for serverA1.a.dom Forwarder someotherzone.local (10.0.0.1) cannot resolve the host name 192.168.1.2,someotherzone.local for serverA2.a.dom Forwarder someotherzone.local (10.0.0.2) cannot resolve the host name 192.168.1.2,someotherzone.local for serverA2.a.dom Forwarder 0.0.10.in-addr.arpa (10.0.0.1) cannot resolve the host name 192.168.1.1,0.0.10.in-addr.arpa for serverA1.a.dom Forwarder 0.0.10.in-addr.arpa (10.0.0.2) cannot resolve the host name 192.168.1.1,0.0.10.in-addr.arpa for serverA1.a.dom Forwarder 0.0.10.in-addr.arpa (10.0.0.1) cannot resolve the host name 192.168.1.2,0.0.10.in-addr.arpa for serverA2.a.dom Forwarder 0.0.10.in-addr.arpa (10.0.0.2) cannot resolve the host name 192.168.1.2,0.0.10.in-addr.arpa for serverA2.a.dom The only exception is the main AD DNS zone managed by domain B's DNS servers (b.dom): for that conditional forwarder, no alert is generated and the forwarder availability monitor is green. Ok, what does this mean? What are those monitors trying to tell me? What are they checking? What's actually wrong? And why there is no error for the "b.dom" zone, which is configured in the exact same way as the other ones, both as a zone in domain B's DNS servers and as a forwarder in domain A's DNS servers?

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  • Huge performance difference between two web servers, odd behavior seen using process monitor

    - by Francis Gagnon
    We have two Coldfusion servers that have a huge performance difference running the exact same code on the exact same input data. The code in questions instantiates a large amount of CFCs (Coldfusion Components, which are similar to objects in OOP languages). I compared the two servers by running Process Monitor and then calling the problematic code on both machines. I learned two things. First, Coldfusion opens CFC files every time it instantiates an object. Both servers do this, so it cannot be the cause of the performance difference. Second, the fast server opens the CFC files directly while the server with the performance problem seems to navigate its way through the path until it reaches the desired CFC file. It does this for every file, even the ones it has previously loaded, and because the code instantiates so many CFCs it becomes very slow. See below the partial Promon traces that show this behavior. It can take over 60 seconds for the slow server to do what the fast one does in 2 seconds. Can anyone tell me what causes this behavior? Is it a Coldfusion setting? Since Coldfusion runs on top of Java, is it a Java setting? Is it an OS option? The fast server is running Windows XP and I think the slow server is a Windows Server 2003. Bonus question: Coldfusion doesn't seem to perform any READ FILE operations on any of the CFC or CFM files. How can this be? Sample of the fast server opening CFC files: 11:25:14.5588975 jrun.exe QueryOpen C:\CF\wwwroot\APP\com\HtmlUtils.cfc 11:25:14.5592758 jrun.exe CreateFile C:\CF\wwwroot\APP\com\HtmlUtils.cfc 11:25:14.5595024 jrun.exe QueryBasicInformationFile C:\CF\wwwroot\APP\com\HtmlUtils.cfc 11:25:14.5595940 jrun.exe CloseFile C:\CF\wwwroot\APP\com\HtmlUtils.cfc 11:25:14.5599628 jrun.exe CreateFile C:\CF\wwwroot\APP\com\HtmlUtils.cfc 11:25:14.5601600 jrun.exe QueryBasicInformationFile C:\CF\wwwroot\APP\com\HtmlUtils.cfc 11:25:14.5602463 jrun.exe CloseFile C:\CF\wwwroot\APP\com\HtmlUtils.cfc Equivalent sample of the slow server opening CFC files: 11:15:08.1249230 jrun.exe CreateFile D:\ 11:15:08.1250100 jrun.exe QueryDirectory D:\org 11:15:08.1252852 jrun.exe CloseFile D:\ 11:15:08.1259670 jrun.exe CreateFile D:\org 11:15:08.1260319 jrun.exe QueryDirectory D:\org\cli 11:15:08.1260769 jrun.exe CloseFile D:\org 11:15:08.1269451 jrun.exe CreateFile D:\org\cli 11:15:08.1270613 jrun.exe QueryDirectory D:\org\cli\cpn 11:15:08.1271140 jrun.exe CloseFile D:\org\cli 11:15:08.1279312 jrun.exe CreateFile D:\org\cli\cpn 11:15:08.1280086 jrun.exe QueryDirectory D:\org\cli\cpn\APP 11:15:08.1280789 jrun.exe CloseFile D:\org\cli\cpn 11:15:08.1291034 jrun.exe CreateFile D:\org\cli\cpn\APP 11:15:08.1291709 jrun.exe QueryDirectory D:\org\cli\cpn\APP\com 11:15:08.1292224 jrun.exe CloseFile D:\org\cli\cpn\APP 11:15:08.1300568 jrun.exe CreateFile D:\org\cli\cpn\APP\com 11:15:08.1301321 jrun.exe QueryDirectory D:\org\cli\cpn\APP\com\HtmlUtils.cfc 11:15:08.1301843 jrun.exe CloseFile D:\org\cli\cpn\APP\com 11:15:08.1312049 jrun.exe CreateFile D:\org\cli\cpn\APP\com\HtmlUtils.cfc 11:15:08.1314409 jrun.exe QueryBasicInformationFile D:\org\cli\cpn\APP\com\HtmlUtils.cfc 11:15:08.1314633 jrun.exe CloseFile D:\org\cli\cpn\APP\com\HtmlUtils.cfc 11:15:08.1315881 jrun.exe CreateFile D:\ 11:15:08.1316379 jrun.exe QueryDirectory D:\org 11:15:08.1316926 jrun.exe CloseFile D:\ 11:15:08.1330951 jrun.exe CreateFile D:\org 11:15:08.1338656 jrun.exe QueryDirectory D:\org\cli 11:15:08.1339118 jrun.exe CloseFile D:\org 11:15:08.1526468 jrun.exe CreateFile D:\org\cli 11:15:08.1527295 jrun.exe QueryDirectory D:\org\cli\cpn 11:15:08.1527989 jrun.exe CloseFile D:\org\cli 11:15:08.1531977 jrun.exe CreateFile D:\org\cli\cpn 11:15:08.1532589 jrun.exe QueryDirectory D:\org\cli\cpn\APP 11:15:08.1533575 jrun.exe CloseFile D:\org\cli\cpn 11:15:08.1538457 jrun.exe CreateFile D:\org\cli\cpn\APP 11:15:08.1539083 jrun.exe QueryDirectory D:\org\cli\cpn\APP\com 11:15:08.1539553 jrun.exe CloseFile D:\org\cli\cpn\APP 11:15:08.1544126 jrun.exe CreateFile D:\org\cli\cpn\APP\com 11:15:08.1544980 jrun.exe QueryDirectory D:\org\cli\cpn\APP\com\HtmlUtils.cfc 11:15:08.1545482 jrun.exe CloseFile D:\org\cli\cpn\APP\com 11:15:08.1551034 jrun.exe CreateFile D:\org\cli\cpn\APP\com\HtmlUtils.cfc 11:15:08.1552878 jrun.exe QueryBasicInformationFile D:\org\cli\cpn\APP\com\HtmlUtils.cfc 11:15:08.1553044 jrun.exe CloseFile D:\org\cli\cpn\APP\com\HtmlUtils.cfc Thanks

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  • Monitor randomly shutting down, computer accepting no input, need to restart to get working

    - by Sebastian Lamerichs
    First off, spec list: OS: Windows 7 Ultimate 64-bit SP1 CPU: i7-4820k @ 3.7GHz (stock) GPU: Two 3GB Radeon HD 7970s @ 1.05GHz Mobo: AsRock X79 Extreme6 HDD: 2TB Seagate Barracuda 7200rpm RAM: 16GB quad-channel Kingston 1600MHz PSU: Antec HCG 900W Monitors: Acer S220HQL 1920x1080 + ViewSonic VA2251 1920x1080. Plugged into different GPUs. My problem is that, on a daily-ish basis, my monitors will turn off and not turn back on. My computer will still be running, GPU/CPU/case fans all still going, but the monitors will not turn back on. Additionally, it seems to cease all network activity. It doesn't seem to log any errors at all. I've verified that this is not a monitor issue, as when I press the num/caps/scroll lock buttons on my keyboard, the lights don't change, so the computer is clearly not accepting input. I have noticed a few other people on the internet with this problem, and some have claimed that it was solved by disabling PCI-Express Link State Power Management, but the issue still occurs for me after this. Whilst my CPU and GPUs both run at 100% 24/7, the temperatures are certainly not at dangerous levels, with the CPU averaging 65°C and the GPUs at 70°C and 78°C average. All components are brand new. I have tried forcing MSI Afterburner to start when Windows starts and to force a constant voltage, as this fixed the issue for a few days for another user, but he reported back saying that it had stopped working properly again, so I'm not putting too much faith in this working. Many people have said to adjust display sleep mode settings, but this will clearly not work, as the keyboard lights would still work if the monitors were the issue. The closest I can get to a log file for this issue is the following Folding@Home logs: 14:45:21:WU01:FS00:0x17:Completed 1120000 out of 2000000 steps (56%) 14:46:43:WU00:FS01:0x17:Completed 480000 out of 2000000 steps (24%) 14:46:49:WU01:FS00:0x17:Completed 1140000 out of 2000000 steps (57%) 14:48:30:WU01:FS00:0x17:Completed 1160000 out of 2000000 steps (58%) 14:49:55:WU01:FS00:0x17:Completed 1180000 out of 2000000 steps (59%) As you can see, the second GPU (FS01) stops computation approximately three and a half minutes before the issue occurs (it should be completing 1% every 80-120 seconds), and the first GPU (FS00) continues for a few minutes more before the logs just end. As far as I can tell, the computer has a network failure at the time the first GPU stops working, the latest IRC message I received from this time was at 14:47:58. That being said, there could have just not been any messages between then and 14:50:00, so I'm going to be connecting a laptop to the same bouncer to double-check if it happens again. The GPUs functioned perfectly well in another computer for a significant period of time, so I'm fairly confident that they aren't the issue, which means that this is being caused by either software or the motherboard, or possibly RAM. I really hope it's software. I heard from a forum board that there was a patch from Microsoft that fixed this problem, but "I've forgot which KB it was or the google search terms I used to find the patch, LOL.", so that's not much help. Haven't seen it mentioned by anyone else on about a dozen threads about this issue either. The computer is plugged in via a surge-protected power board, and I've run several other computers and pieces of hardware through it with no issues, so that is not the cause. I have just set the hard disk to never turn off, although I don't believe that that will solve the issue. Strangely, this has only happened when I'm not at the computer (which is actually a minority of the time). Until today it had only happened when I had not been actively using the computer for 6 hours, but today it happened within 10-30 minutes of me last using the computer actively. I have enabled file logging from MSI Afterburner, so hopefully this will shed some light on the issue, but I'm not too optimistic. I've heard that it could be a motherboard problem, but I figured I should ask around before RMAing it. Any help?

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  • Linux LiveCD (or LiveUSB) with custom xorg.conf

    - by Jakub Narebski
    Is there some Live Linux distribution (on CD, DVD or USB), which allow one to use specific xorg.conf file, i.e. specific X11 configuration? The problem I am trying to solve is to find Linux Live distribution for web browsing which would work well with NEC LCD 22WV monitor. It is supposedly DDCCCI capable, but X.Org X Window System autoconfiguration fails to detect proper modeline, and uses fallback 800x600 screen resolution, instead of preferred screen resolution of 1680x1050.

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  • Looking for SQL Server Performance Monitor Tools

    - by the-locster
    I may be approaching this problem from the wrong angle but what I'm thinking of is some kind of performance monitor tool for SQl server that works in a similar way to code performance tools, e.g. I;d like to see an output of how many times each stored procedure was called, average executuion time and possibly various resource usage stats such as cache/index utilisation, resultign disk access and table scans, etc. As far as I can tell the performance monitor that comes with SQL Server just logs the various calls but doesn't report he variosu stats I'm looking for. Potentially I just need a tool to analyze the log output?

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  • My Laptop Screen keeps flickering...

    - by Chris
    I have a lenovo g530 and the screen keeps flickering on occasion. Sometimes it is worse than others, and sometimes it doesn't seem to do it at all. I was able to capture a video of it so you could see what is happening. I kinda wanted someone else's opinion before I open it up and check the monitor cable on the board. Video Link (in case you missed it above)

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