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• What is causing my internet to be slow on one laptop but not the other and only at a distance?

  - by Matt Case

  I have a newer laptop, purchased within the last year (acer aspire 7740). This laptop does not have any problem connecting to wireless networks and indicates that the signal strength is excellent on most of the wireless networks I connect to. When the laptop is within 10 feet of my wireless router it gets 30 down 10 up. When it is farther away than 10 feet it will be lucky to get 3 down and 1 up. I also have an older laptop, purchased in 2005, that has no problems at all at the same range. None of my phones, gaming consoles or tablets have this problem. I am beginning to think that the problem must be some hardware defect with the wireless card. I can provide additional information if needed. Just thought I'd check to see what others thought because I've been working on computers my whole life and have never heard of this happening. I have also tried to change the channels on my wireless router and have had no success with this idea.

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• Feeding the kernels entropy source from other machines and/or increasing its maximum size

  - by David Spillett

  We have has a little trouble with a small box that acts as a VPN end-point and mail relay for our network, caused by the available entropy for /dev/random being too low (which causes TLS connection attempts by exim to fail). The machine doesn't do anything else, so the normal feed into the entropy pool (interrupt timings from things like disk access) is not enough. As a quick hack I've set a looping script that reads from /dev/hda at a couple of Mbyte/sec which keeps it topped up. Other than buying a hardware RNG, is there a clean way of piping data for entry from elsewhere, such as a copy of the data our file server uses for its entropy source? I've spotted several tips for using rng-tools to feed it from /dev/urandom on the same machine but that "feels dirty". Also, is it possible to increase the maximum pool size? It currently seems to max out at 3585.

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• Cisco redundancy modes

  - by user974896

  I am using a Cisco 6500 series with an SSO redundancy configuration. The show redundancy output is as follows: Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = rpr Maintenance Mode = Disabled Communications = Up I would assume the device is operating in RPR mode although SSO is configured. What could cause this? Shouldn't the operating mode be SSO? EDIT (show redundancy states): my state = 13 -ACTIVE peer state = 4 -STANDBY COLD Mode = Duplex Unit = Primary Unit ID = 5 Redundancy Mode (Operational) = rpr Redundancy Mode (Configured) = sso Redundancy State = rpr Split Mode = Disabled Manual Swact = Enabled Communications = Up client count = 60 client_notification_TMR = 30000 milliseconds keep_alive TMR = 9000 milliseconds keep_alive count = 1 keep_alive threshold = 18 RF debug mask = 0x0

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• some keyboard keys not working properly

  - by surfmadpig

  I'm using Windows 7. All of a sudden, a couple of hours ago, this happened: My keyboard number keys [above the letters] stopped working properly, both as numbers and as symbols. Only 5 and 6 are functional. Also, I've noticed that the End key isn't working either, and perhaps a couple more from that group. I'm pretty sure it has something to do with those evil Sticky Keys/Filter Keys/ whatever those ease of access things are, BUT I've turned off all the ease of access keyboard options and nothing has changed. Is it possible that something is still turned on while I unchecked it? Are the on/off checkboxes to control WHEN it happens or IF it happens? I also tried rebooting and uninstalling/reinstalling keyboard from device manager, to no avail. It's certainly a software issue and not a hardware issue, as I've tried another keyboard and the problem persists. And, predictably enough, it's annoying. Any ideas?

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• Difference in behavior of reboot

  - by LinuxPenseur

  Hi, I have 2 machines running linux. In one machine, the reboot command is an executable normally found in all linux distributions. In the second machine the reboot command is a shell script customized using some other hardware tool commands to reboot the system. One behavior difference between the 2 machines is that when i execute reboot command on the first machine, it shows another shell prompt and then only reboots. But in the case of second machine, it reboots without showing a shell prompt. I expect the second machine to behave the same way as first machine when reboot command is given. Currently i am analyzing the source code of shutdown.c and halt.c normally found in linux distributions, so that i can find out the implementation which produces the shell propmt on reboot and use that in the shell script in second machine. Kindly give me some pointers on where i should start looking to find the implementation. Thanks

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• Enable System Beep in Ubuntu

  - by Melissa W

  I have tried and tried to get the system beep working, but with no success. I have selected System--Sound--System Beep--Enable Audible Beep (from the Gnome Desktop) I have tried from a Terminal window Edit--General Tab--Selecting terminal bell checkbox I have tried entering modprobe pcspkr at the command line. Trying echo -e '\a' or using the beep application - Nothing works! I know my hardware speaker works, because if on startup the battery is low it will beep. Update: It is a laptop computer. It is an IBM Thinkpad, iSeries. I did look at the modprobe blacklist, and pcspkr was not listed.

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• Using video ports 'backwards'

  - by ACarter

  If I want to connect my laptop, which has a VGA output, to a monitor, I plug a VGA cable into both ends. The output being my laptop, and the input the monitor VGA output sockets are the same as VGA input sockets however, so what if I want to use my laptop as the monitor, with the video being outputted from somewhere else? As I said, VGA's output is the same as input, so in theory, I have the hardware in my laptop to do this. But presumably I need some software. So can I use the VGA port on a laptop as a video input? (And also, can this be done with HDMI?)

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• SAS disk performance drops a while after reboot.

  - by Flamewires

  So we have some workstations with identical hardware. The Fedora14 box has a couple weeks uptime and still get good performance. hdparm -tT /dev/sda /dev/sda: Timing cached reads: 21766 MB in 2.00 seconds = 10902.12 MB/sec Timing buffered disk reads: 586 MB in 3.00 seconds = 195.20 MB/sec The Cent 5.5 boxes however seem to be okay after a reboot, /dev/sda: Timing cached reads: 34636 MB in 2.00 seconds = 17354.64 MB/sec Timing buffered disk reads: 498 MB in 3.01 seconds = 165.62 MB/sec but some time later( unsure exactly, tested at approx 1 day uptime) /dev/sda: Timing cached reads: 2132 MB in 2.00 seconds = 1064.96 MB/sec Timing buffered disk reads: 160 MB in 3.01 seconds = 53.16 MB/sec drop to this. This is with very low load. I believe they all have the same bios settings. Any ideas what could cause this on Cent? Ask for more info. It might also be worth noting, that passing the --direct flag causes the slow boxes to perform similarly to the non-slow ones for buffered disk reads.

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• Why such a dramatic difference in wireless router max. simultaneous connections?

  - by Jez

  Recently, I've needed to look into buying a wireless router for a mission-critical system at work that will need to support quite a few simultaneous connections (potentially a few hundred laptops). One thing I've noticed is that there seems to be a dramatic difference between the max. simultaneous connections different routers can support; see this page for example - anything from 32 to 35,000! Why is there this degree of difference? You'd have thought that if we know how to make routers that can handle thousands of connections, we wouldn't be making stuff that's limited to a pathetic 32 anymore. Is it a firmware thing? A hardware thing? Are low-end manufacturers purposely putting low arbitrary connection limits in so people can be "encouraged" to pay more for high-end routers?

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• How can I combine non-identical disks efficiently?

  - by Odys

  There are some not-identical disk of various capacities that I want to combine (somehow). Since there are no duplicate models, I can't use raid between none of them. Is there a way to use them efficiently while being safe? What I have in mind is a software that will use them as if it were Raid-5 or something. I really don't care about max speed. I want in the end to have as less logical drives as possible. Also, I don't mind spending some money on hardware, if needed.

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• Transfer Raid Drives to External Enclosure

  - by dubbeat

  I have 2 raid disks (a grand total of 360GB) in my laptop. I'm fast running out of space and want to install new drives. I've a pretty good idea how to do this. My question is what can I do with the drives that I remove? I've got lots of media files on these drives that I'd like to keep and maybe transfer back onto my laptop once I have the new drives installed. Bearing in mind that I know next to nothing about hardware how do you suggegst I go about reusing the removed drives somehow? Thanks,

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• Is there a limit on the number of USB external drives?

  - by Beska

  I've got three external HDDs, all My Books, 500 GB, 750 GB, and 1 TB. If I hook one or two of them up to a computer, everything seems fine. If I hook all three of them to a computer (I've tried this on two different computers, one running Windows XP, one running Windows Vista), the bootup time goes up by more than an order of magnitude. It can suddenly take about 10-20 minutes to boot the machine, whereas before it might take a minute. All three drives work fine on their own. I'm not using any kind of hub; all three are plugged directly into the machine. Is this associated with some kind of inherent limit in USB? Is this bad hardware design in the CPU box? Is this a My Book problem?

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• Load balancing + NAT issue on BNT GBE 2-7 gear

  - by Clément Game

  Hi guys, I've got troubles configuring an Hardware load-Balancer with NAT functions. I have the following architecture: Internet === VIP (public) LB (private ip) ==== private addressed servers When a connection is initialised from the outside (internet) , the LB correctly forwards the SYN packet to one of the private servers. But when these servers want to reply with a SYN/ACK there is a problem. the initial SYN packet had as ip header : VIP = Private_server_Address But the private servers cannot reach VIP from their side (this is normal since it's nated), and then provide a correct reply. Have you guys any solution to correctly forward the packets to their correct destination ? Note: The load balancer, which is the default gw for the servers, also has a NAT rule for "masquerading" (actually more SNAT than real masquerading) Regards, Clément.

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• X200 Tablet notebook won't start after BIOS Update

  - by THEn

  I have LENOVO X200 Tablet and I ran the BIOS Update and the computer won't start after the BIOS update. When I ran the BIOS update utility it ran everything fine and asked to restart the computer but it wont start screen is blank. I unplugged the power and took of the battery and put them back and still not starting. Now it has [Power On] indicator light on and screen is not starting. I tried pressing F1 button while trying to start the computer but it doesn't do react to anything. Please help how I can start my Tablet. The update utility is http://support.lenovo.com/en_US/downloads/detail.page?LegacyDocID=MIGR-70651 Does any body know if X200 have any kind of hardware switch to reset the BIOS or any thing? What would be the best way to fix my BIOS? Thank you.

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• CentOS send mail with external SMTP server and without local daemons

  - by Vilx-

  I've got a little old server with CentOS 6.5 on it. The hardware is old and crappy, but enough for what it has to do. Which consists of SSH (+SFTP), Apache, PHP and MySQL. Still, I'm trying to cut away all that I can. One thing that it does not need to do is to be an SMTP server. There are no mailboxes on it and nobody will ever route mail through it. However I do want it to send me an email when something goes wrong. Also, the webpages will send emails from PHP. So that brings me to the question - can I set up the mail system in such a way that there isn't an expensive mailer daemon sitting in the background with queues and whatnotelse, but rather every email is directly and immediately delivered to an external SMTP server? And how do I go about it?

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• How to clean this Dell Precision M6400

  - by Daniel Pratt

  I have (well, ok, my employer has and I use) a Dell Precision M6400 notebook. It's a decent piece of hardware, but I have at least one major gripe: It's a dust and...uh...crumb (I repent! I repent!) magnet! And I cannot seem to exorcise the dust/crumbs from it! There is a strip of metal above the keyboard that is punched full of tiny holes. Well, maybe it's better to describe them as 'pits'. If a sufficiently small particle finds its way into one of those pits, there is only about a 50% that I will manage to get it out. Consequently, there is now a chorus of tiny little particles silently chiding me about eating cookies a cracker whilst I browse the intarwebs. Does anyone have any suggestions about how I could remove these particles from this machine...while still preserving the function of the machine?

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• kernel warning disk error for command write - solaris svm

  - by help_me

  Recently this warning came up on my message logs, scsi: [ID 107833 kern.warning] WARNING: /pci@1c,600000/scsi@2/sd@0,0 (sd0): Oct 27 00:14:44 Error for Command: write(10) Error Level:Retryable Oct 27 00:14:44 scsi: [ID 107833 kern.notice] Requested Block: 101515828 Error Block: 101515828 Oct 27 00:14:44 scsi: [ID 107833 kern.notice] Vendor: SEAGATE Serial Number: 0441B9B5H Oct 27 00:14:44 scsi: [ID 107833 kern.notice] Sense Key: Hardware Error Oct 27 00:14:44 scsi: [ID 107833 kern.notice] ASC: 0x19 (defect list error), ASCQ: 0x0, FRU: 0x2 This is showing signs of disk failing in my opinion. I have not seen the messages re-occurring. This is on a Solaris 9 Sparc system V240. The disks are managed by SVM and "metadb" is showing the flags as "a" Are there any tests or indications as to check/see if the disk is actually failing or was that error message initiated by something else. Thank you!

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• Which SATA controller is better to use with Windows Server 2008 R2 64 bit?

  - by at8eqeq3

  We're preforming some hardware upgrade on our server machines. As a part of this process, we have to install some additional disk drives. Unfortunately, total number of drives will become 7 or 8, while all of our motherboards have only 6 SATA ports. Obviously, we need additional disk controllers. For now, we've tested Silicon Image (actually, no-name) and Adaptec controllers, both on SiI3132 chip, and got some problems with drivers for them: Silicon Image drivers are not installing at all, and Adaptec ones are installing, but the system says they're not signed and becomes unbootable. We're tryed both drivers from controllers' CD's and latest versions from manufacturers' websites, and no luck. So, can you recommend some SATA controllers that will really work without tambourine dances on mentioned OS (we need just 2 SATA ports and PCI-E, while RAID and any other features are no-matter)? Thanks for any help.

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• How to troubleshoot memory card read?

  - by shinjin

  The built in memory card reader in my laptop mounts SD cards as read-only only. This happens both in Windows 7 and Ubuntu. Most of the time. Ever now an then it works. After a some non-deterministic combination of uninstalling/reinstalling/disabling/enabling of the driver with the mandatory reboots the card reader works for a while. Is there any sane way to troubleshoot if it's an actual hardware problem, or just a matter of drivers? I've tested it with several SD cards, that work just fine in other devices. System: Acer Aspire 8951G, Windows 7-64bit

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• Mouse wheel does not work in Excel 2007

  - by Chris Noe

  I am running Office 2007 on Windows XP-SP3. My mouse wheel works fine in other applications, meaning that it scrolls information up and down when the mouse is positioned over a given panel. It's even working fine in the other Office 2007 apps, so this is not a hardware or driver problem. It doesn't help to click on a cell to give the worksheet focus. I've tried various Advanced options that people recommend, to no avail: Allow editing directly in cell Zoom on roll with IntelliMouse What the heck, has Microsoft disabled this most useful functionality?

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• Can I get redundancy with a JBOD storage subsystem

  - by Dat Chu

  I have a Promise Technology J610S. This is a JBOD subsystem. Is it possible for me to buy a SAS hardware RAID controller and provide some type of redundancy for these drives? I am unsure whether I will use Linux or Windows yet so an answer with enumeration for both would be highly appreciated. One solution that I thought of was: if my J610s can export each drive as a target, my server will simply see 16 drives. The RAID controller can then perform the RAID5/RAID6 if I want.

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• Windows 7 x64 Hard Freezing (again)

  - by Lanissum

  Awhile ago, my computer was randomly freezing a few minutes after booting, and I ended up replacing the CPU and mobo after testing the RAM and hard drive, I also couldn't find anything wrong with the video card. So after replacing the presumably faulty hardware, everything worked fine for about a month and a half. All of a sudden, My computer is randomly freezing a few minutes after loading up any intensive application (games, mostly). Most of the time it just freezes with the current frame until I hard reset, although once it printed a BSOD message stating that dxgmms1.sys was to blame. The only difference between these two episodes I can think of is that I can do word/internet/work without issue now, as opposed to the near uselessness my computer was rendered last time. For those of you who want to know, I tested my memory with memtest86 (for 64 bit machines). I can't figure out what could have started this latest round of issues, the event logger just states that a kernel-power event has occurred (like last time) but I think thats just a generic "this machine has rebooted after a sudden shutdown" message.

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• VMware ESX 3.5 Host Health shown as unknown

  - by dunxd

  I have an ESX 3.5 update 5 cluster of five host servers, all fully patched as of this Friday. Today I noticed that one of the servers has the Hardware Health status as unknown in Virtual Center Infrastructure Client. When I look at the Health Status view under configuration for that host, all the items are status Unknown. The server is exactly the same configuration as the others - same model (HP DL360 G5), memory, NICs etc. I have tried restarting the management service with service mgmt-vmware restart but this has not resolved the issue. Asides from this, I am not seeing any issues with the cluster - however, I hate having a blind spot like this. Any ideas?

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• Default Webcam Driver Issues

  - by Omegaclawe

  I'm having troubles getting my monitor-attached webcam (ASUS VK248H) to install on my new computer. On the old computer, it was a matter of not using a USB 3.0 port, but I can't get anything to work on the new one. I have tried all manner of uninstalling/reinstalling the driver and resetting the computer, as well as literally every USB port on the computer (14 in total). It's not that windows isn't recognizing the device; it most certainly is. However, comparing it to the old computer's driver details, on the new computer, it is not using the ksthunk.sys driver in addition to the usbvideo.sys driver, like on the old (working) computer. Naturally, I figured the way ahead was to simply get this other driver to work with the hardware, but haven't really found out a way to do that. Does anyone know of a way I can force it to use ksthunk.sys? It seems rather difficult to get it to install anything when Windows is feeling that everything is peachy.

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• Slowness on Exchange 2007 Server (network related we think)

  - by Az

  We are seeing some odd behavior out of our exchange 2007 server. I believe it is network related as during the slowness in response from the exchange server. During these times downloading files to server is fraught with connection resets and extreme slow download speeds that are not affecting other servers right on the same subnet with the same gateway and ISP. We have about 50 users at a time using Outlook 2003 from a terminal server not displaying any other signs of slowness, all network slowness is confirmed trying downloads on the exchange server itself. Checked for virus issues, there are none. Checked for hardware issues, none found I am noticing between 200-400 TCPv4 connections established I am seeing around 100k tcpv4(active) connections according to perfmon are these numbers odd? Has anyone run into anything similar? Our server has a gigbabit NIC linked to a gigabit switch using cat6 so I do not believe it is "physical". Thanks!

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