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• What desktop chipsets support AMD's Rapid Virtualization Indexing?

  - by netvope

  Rapid Virtualization Indexing (RVI) is a hardware virtualization feature that can potentially give significant performance improvement. Intel's equivalent is Extended Page Tables. See http://en.wikipedia.org/wiki/Rapid_Virtualization_Indexing for more details. My question is: Does RVI require motherboard or chipset support? If yes, what desktop chipsets support it? I've ordered a Phenom II CPU (which supports RVI) but I haven't bought the motherboard. I'll install XenServer or VMware ESXi (which both support RVI) on the new computer.

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• nVidia Control Panel Won't Recognize SLI

  - by Nakaan

  So yesterday I bought a brand new, 1,000W PSU to replace my 650W one and to allow for SLI. I install it and my second card (both are GTX 560 ti cards). I reinstalled my drivers and my system recognizes both cards. The control panel says "GTX 560 ti x2", I can select between them for Physx, sound output, picture output (although I only have one hooked up to my monitor), etc. But the kicker is I can't turn on SLI. Everything I've read says I'll get a balloon notification saying I can use SLI and the control panel will have a new section, etc, but none of those things happens. Anyone have any ideas? System: Win7 Professional x64 2x GTX 560 ti 3.1 GHz Intel Core i5 1,000W Xion PSU 8GB RAM (Can't think of my motherboard right now) Note: My PSU and MOBO both say they're SLI certified and I'm using an SLI bridge. Edit: Formatting changes

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• Strange behavior in networking between 64bit and 32bit

  - by Rob

  I'm having a strange behavior about my network setup. I have 2 laptops, one (Lenovo) with Windows 7 Professional 64-bit and another (Acer) with Windows 7 Ultimate 32-bit and a wireless router. I'm connecting these 2 using the router but with a strange behavior. I can ping both machines, as well as the router, but when i try to access their shared folders (\\computer_name\shared_folder) the connection starts to fail and I need to reboot both machines to get it working again. But this only happens sometimes, sometimes it works.

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• Pros/cons to turning off cable modem

  - by Jay

  A little off the wall perhaps, but ... I have a cable modem and a router for a wireless home network. Is it a good or a bad idea to turn it off at night and during the day when we're all at work or school? Or should I leave it on 24/7. I was thinking that leaving it on constantly makes me more vulnerable to hackers, not to mention wasting electricity. (Though I'd guess the amount of electricity used by a cable modem and a router is probably pretty trivial. Still, every little bit helps.) When I have turned it off and turned it on again, it takes several minutes for it to go through its little dialog with the cable company and get me connected to the Internet again, which is annoying but not a big deal. Anyone know any good reasons one way or the other?

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• Laptop hardware recommendations for multi-platform development

  - by iama

  I am thinking of buying a laptop with the following configuration - Intel core 2 duo(or I3-330M)/ 4GB RAM/300+ GB 7200 RPM. I would like to be able to run two server VMs on this laptop with Win2K8 and Ubuntu (preferably 64 bit editions). Windows 7 will be the Host OS since that is the one that ships with the laptop. I am thinking of using VMWare player to run the two server OSs. Is this laptop good enough to run the two VMs side by side or do I need to go for a better configuration? Any suggestions? Thanks.

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• Can Linux works as 802.1X authenticator in bridge mode ?

  - by Kartoch

  I want to create a lab for my students with netkit (a network emulator based on 802.1X) to study 802.1X. I can create the authentication server (FreeRadius) and configure the client with XSupplicant connected by a switch (a Linux in bridge mode). I'm looking to a way to configure the switch as Authenticator, i.e.: when the client is connected, the switch only forwards EAP packets to the authentication server. then the switch lets the user access to the local network when the authentication server authorizes the client. At the present time there is a lot of documentation to do this with a wireless point but no one for a switch. Does anyone have an idea or know the good software for it ?

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• how to test lan network speed with ps3

  - by Damon

  I am having a heck of a time trying to get videos streaming to my PS3. I want to know if there is some way to test the speed between my PC and ps3 to see if that is the issue. For some reason when things get really slow between the ps3 and my computer (it's a wired connection through a switch), the wireless internet on completely different computer gets slow. I don't know what's causing what, but I don't know why there should be any correlation between internet speed on a wirelessly connected laptop and the LAN speed between a wired ps3 and computer.

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• HDMI output issue in Ubuntu

  - by xsznix

  Hi, I am using Ubuntu 10.04 on a HP notebook with a nVidia GT 130M graphics card. Whenever I connect a HDTV using the HDMI output and set all of the settings in the nVidia Control Panel, it will output to the HDTV, but cut off about 24 pixels on each side. Sometimes (but not often), it will work properly (display the entire screen), but I cannot get it to work thus consistently. I have tried using resolutions of 1920x1080, 1360x768, 800x600 with two HDTVs of different brands, with and without forcing full GPU scaling, with and without syncing to VBlank (what is this?), etc., and also using a Linux Mint 9 computer with integrated Intel (X4000-ish, don't remember exactly) graphics. The problem persists no matter what, but only with HDMI output (VGA works fine). The same computers works fine with HDTVs in Windows. Any ideas?

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• Processor not running at max speed

  - by Andrew Hampton

  My laptop has an Intel Core 2 Duo T9300 which should be running at 2.5GHz, however CPU-Z consistently reports my Core speed at right under 1.6Ghz (8x multiplier and ~200MHz Bus Speed). Even when I'm doing heavy development work and the processor is running at 100% for extended periods of time the core speed reported by CPU-Z never goes up to 2.5GHz. My understanding is that this reduction in speed is to save power, but this happens even when I'm plugged into the outlet. Does anyone know why this is happening or how to fix it?

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• How can you enable SMB2.0 on a router running DD-WRT?

  - by jeffreypriebe

  I think the steps are something like: Install DD-WRT on a router with an external hard-drive Install Optware to get Samba Upgrade to Samba 3.6 (the link shows Samba 3.5, but using the NSLU2 optware packages, you can get 3.6 with built-in SMB2.0) ...then a miracle occurs... Then you can use SMB2.0 to connect to your share What is step 4? I can't find it on forums, etc. Am using Microsoft Network monitor to check for SMB2.0 connection, I'm on Windows 7 and have tried network connections on wireless and gigabit wired to the router. No joy. I doubt it matters, but to get ahead of the questions: DD-WRT v24-sp2 (10/26/10) big (SVN revision 15508M NEWD-2 K2.6 Eko) on Cisco/Linksys E3000

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• Safari 5 fails to install on my Mac

  - by Amairani409

  I just got the new Safari 5.0 I downloaded because my Mac told me there was a new version that I should be getting. But when I try to run this new version of the application -- nothing happens! I mean the program seems to be working but nothing appears on the screen and so when I try to see my top sites a little window shows up but it just doesn't show anything. Then 3 seconds later the program shuts down! I don't know why this is happening; ideas? Mac OS X version 10.5.8 2.66ghz intel core 2 duo 4gb 1067 MHz DDR3

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• Multiple Subnets on home network... would this work?

  - by rockinthesixstring

  We are looking at renting out the basement suit in our home and want to offer internet as part of the package. I however do not want the downstairs tennent to have access to our network (home office = private data). We currently have a pfsense firewall as our gateway and a Windows Server 2003 box is doing our primary DHCP (192.168.0.0/24) and DNS. Here's what I'd like to do... I'd like to setup another subnet on the DHCP server (192.168.1.0/24), and hook in another wireless router (as access point only) and address it as 192.168.1.1... from there the router will hook into our primary switch and then out through the firewall. Will Server 2003 (If I add a 192.168.1.x/24 IP to the nic) serve DHCP to the devices that connect to the new router, and will it isolate that from our network? Thanks in advance... I'm very new to multiple subnets.

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• CPU fan making noise

  - by superb1

  CPU fan is making noise. I figured out some reasons: Cable coming out of fan is vibrating. And maybe also CPU fan is loose causing vibration. Suggest options. I cleaned the fan. But found that there is no heatsink compound /paste between processor and the fan. Is it OK? My processor is P4 2.4 GHz. Motherboard Intel 845 GVSR.

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• xorg DPMS off: keep VT from turning screen back on

  - by Metiu

  I have an embedded board with a small UPS. When AC power goes down, I need to turn off all power hungry devices in order to have a clean shutdown. First thing I do, is set DPMS to force powerdown, then go through the usual SIGTERM/SIGKILL/umount sequence. I have an Intel i915 Display adapter connected to an LVDS LCD panel. Unfortunately, when Xorg dies, Xserver or the VT code turn the LCD panel back on. I even tried working around it by directly poking the panel enable register in the Display chip, so that X doesn't know about it, but the panel goes back on when the VT comes back. Is there any "legal" way of keeping the display off? Thank you

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• BSOD 0x000000f4(Probably caused by : wininit.exe)

  - by vacuum

  I have BSOD with 0x000000f4 code. It appears when system is not loaded at all. No new hardware where intalled. Only nvidia drivers where updated 3 days ago and they are up to date for now(version 296.10). System Health Report(perfmon /report) shows nothing interesting(only complained on disabled UAC) System is on SSD disk(WDC SSC-D0064SC-2100 B) Dump Spec: OS Name Microsoft Windows 7 Ultimate Version 6.1.7601 Service Pack 1 Build 7601 System Manufacturer Gigabyte Technology Co., Ltd. System Model P31-DS3L System Type x64-based PC Processor Intel(R) Core(TM)2 Duo CPU E7200 @ 2.53GHz, 2534 Mhz, 2 Core(s), 2 Logical Processor(s) BIOS Version/Date Award Software International, Inc. F9, 10.07.2008 Any suggestions?

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• Changing linksys router configuration from command-line

  - by Dan

  I am constantly logged into (ssh'd) my home machine (ubuntu) from various remote locations. Sometimes I would like to change my home linksys router settings (change the port forwarding settings or disable/enable wireless, things like that). When I try and use the links2 text browser, there isn't much I can do because the tab titles don't show up (presumably because they are pictures?). Is there another way of configuring a linksys router from a command line? I guess my only other option is to set up a proxy on my home machine and use a browser connected to that proxy to configure it, but I would think there might be a non-browser way of doing it. Thanks

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• FreeBSD: Samba performance over GBit-Ethernet

  - by Axel Gneiting

  I'm using a FreeBSD NAS with RAID-Z. I can read ~300MB/s from the ZFS disks to /dev/null on the box, but only get about 50MB/s over GBit-Ethernet with SMB to Windows 7 (Samba 3.5.6). Both systems have Intel-PCIe-NICs and are connected directly. Samba is configured to use AIO and I already tried to tune TCP/IP: kern.ipc.maxsockbuf=16777216 net.inet.tcp.sendspace=1048576 net.inet.tcp.recvspace=1048576 net.inet.tcp.sendbuf_max=8388608 net.inet.tcp.recvbuf_max=8388608 net.inet.tcp.delayed_ack=0 Any ideas what's causing the bottleneck? I think the link should handle 100 MB/s easily.

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• Optimal Memory Configuration for Dell PowerEdge 1800 (Windows Server 2000 32bit)

  - by David Murdoch

  I am upgrading the memory on a Dell PowerEdge 1800 Server running Windows Server 2000 (32 bit). My Computer Properties currently reports "2,096,432 KB RAM" (4 modules @ 512MB each). Crucial.com scan reports: "Each memory slot can hold DDR2 PC2-5300 with a maximum of 2GB per slot. Maximum Memory Capacity:  12288MB Currently Installed Memory:  2GB Available Memory Slots:  2 Total Memory Slots:  6 Dual Channel Support:   No CPU Manufacturer:  GenuineIntel CPU Family:  Intel(R) Xeon(TM) CPU 2.80GHz Model 4, Stepping 1 CPU Speed:  2793 MHz Installed in pairs of modules." We will be completely replacing the old 512 MB modules. Will there be any performance difference between installing 4 modules @ 1GB vs. 2 modules @ 2GB?

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• Teamviewer and Virtualbox issue: some keys don't work

  - by Barranka

  I use Teamviewer on a laptop to connect to a desktop computer running Debian Linux. On this desktop computer I run Windows inside a VirtualBox VM. I have no problems interacting directly with Linux, but when I try to interact with Windows inside Virtualbox, some keys simply don't work! (e.g. period, "@", quotes). Is there something I can do to make the full keyboard of my laptop work correctly with the Virtualbox VM inside the remote host? Specs: The remote host machine is an Intel i7 running Debian squeezy (64 bit) I'm using Teamviewer 7, on both the host machine and the laptop Thanks

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• Smoothwall Express interface issues

  - by Timbermar

  I have a SmoothWall Express box that is currently configured with a Green and Purple interface. Both interfaces are in the same /24 subnet (which seems odd to me). The green interface (address of .254) has a DHCP server that is pushing addresses from .1 to .100 and the purple interface (.253) is pushing addresses from .101 to .120. Every machine here is trusted, and as such is connected to the green interface via a wired connection or wireless APs. Nothing is connected at all (port is physically empty, traffic graphs show no activity) to the purple interface. However, every machine here is pulling addresses from the purple interface. So the question boils down to, how do I remove/stop my machines from pulling from the purple dhcp interface? Also, shouldn't the purple interface (if we were using it for guest Wifi or something) be on a different subnet (i.e. 192.168.100.0/24 instead of 192.168.1.0/24 with all the trusted machines)?

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• Internet very slow when upgrading to Ubuntu 9.10

  - by roojoo

  I was running Ubuntu 8.x on my desktop and everything worked fine. Im using wired internet and it worked perfectly, pages loaded pretty fast. However, when I decided to upgrade to 9.10 the upgrade failed at some point, however I was left with what appeared to be Ubuntu 9.10. Since then the internet has been weird. When I go to a website it takes at least 10 seconds for the page to display, however if Im on a site and navigate to other pages on the website it loads quickly. This never happened prior to the upgrade. I thought this may be due to the upgrade not installing correctly so I did a fresh install of Xubuntu 9.10 but the problems are still the same. Im writing this on a Vista machine over the wireless network and internet is fine. Does anyone have any ideas of the issue? Thanks.

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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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• OpenBSD in a virtual box as a firewall

  - by Ali

  Is there any merit in installing a virtual machine with OpenBSD and pf (or any other simple and secure OS + iptable) on a mac laptop and routing all the traffic through that machine? I read a similar set up for corporate laptops running windows (I thing I read this in BSD magazine). They claim that Windows machines are too hard to secure and if you are taking them to the wild (public wireless, hotels, ...) you'd better but a secure OS in between! If you think this is a good idea, how you route all the traffic on a mac through the virtual machine and prevent any application or service to go directly? I am not sure if just setting the gateway will do that, what about DNS? you don't want anybody to fool you with DNS cache poisoning or similar attacks either.

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• Bridge virtual machines out WLAN interface

  - by Thomas

  It seems that my wlan card (intel 5100 AGN) firmware doesn't allow "spoofing" MAC addresses. This has the side effect of destroying the capability to bridge out my virtual machines on that interface. Apparently this is a common thing on wlan cards. I can see the incoming traffic just fine in my virtual machines, but their DHCP queries don't get bridged out of the WLAN card. It works perfectly well when using the wired ethernet port. Is there a workaround for this? MAC-NAT or something? I don't want to route my virtual machines out to the Internet because I don't want my host OS to even have an IP address. I'm using Linux and KVM for virtualization.

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• Linux Bridge, Samba netbios name/hostname access

  - by Christopher Wilson

  I am currently running a linux bridge in the following configuration ADSL Modem: 192.168.1.1 Linux Bridge: eth0: 192.168.1.2 eth1: no address Wireless Router: 192.168.0.1 My issue is that i cannot access the "Linux Bridge" shares using the WINS name of the server via client systems (yes i understand it is a transparent bridge but i can access it via the 192.168.1.2 address this is not on the same subnet as the client systems). This is the global section of my SMB.CONF [global] unix extensions = off os level = 20 netbios name = server guest account = nobody server string = 447 Server security = share #unix extensions = no #wins support = yes #wins server = 192.168.0.1 name resolve order = wins lmhosts hosts bcast interfaces bridge1 eth0 eth1 lo bind interfaces only = yes Can i access a bridged server using it's WINS name to access samba shares? Cheers Chris

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