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• Periodic internet connection drops

  - by sterlingholt

  My setup is a dsl modem, and a dlink di 524M router. I'm also using a Witopia VPN which runs through OpenVPN. I've been having trouble with the internet connection dropping very frequently. It comes back shortly, without even a router/modem/computer restart. This happens as frequently as every ten minutes. Occasionally (not often) it will last as long as an hour or two without dropping. When it drops, I can get it back almost immediately by clicking Reconnect in the OpenVPN GUI and letting that do it's thing. It's worth noting that I'm in China. Calling support is a bit difficult because of that. Also I don't really understand all of the router's software, although I've got it generally figured out. I've tried a bunch of stuff, attempts to diagnose and/or fix the problem. No success with any of the following: I've power cycled both the modem and the router. I've tried an ethernet connection to the router. I've connected without the VPN. I've disabled IEEE authentication on all connections. I've checked for viruses. I've tried lifting it off the ground so as to prevent overheating.

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• HP Proliant DL380 G4 - Can this server still perform in 2011?

  - by BSchriver

  Can the HP Proliant DL380 G4 series server still perform at high a quality in the 2011 IT world? This may sound like a weird question but we are a very small company whose primary business is NOT IT related. So my IT dollars have to stretch a long way. I am in need of a good web and database server. The load and demand for a while will be fairly low so I am not looking nor do I have the money to buy a brand new HP Dl380 G7 series box for $6K. While searching around today I found a company in ATL that buys servers off business leases and then stripes them down to parts. They clean, check and test each part and then custom "rebuild" the server based on whatever specs you request. The interesting thing is they also provide a 3-year warranty on all their servers they sell. I am contemplating buying two of the following: HP Proliant DL380 G4 Dual (2) Intel Xeon 3.6 GHz 800Mhz 1MB Cache processors 8GB PC3200R ECC Memory 6 x 73GB U320 15K rpm SCSI drives Smart Array 6i Card Dual Power Supplies Plus the usual cdrom, dual nic, etc... All this for $750 each or $1500 for two pretty nicely equipped servers. The price then jumps up on the next model up which is the G5 series. It goes from $750 to like $2000 for a comparable server. I just do not have $4000 to buy two servers right now. So back to my original question, if I load Windows 2008 R2 Server and IIS 7 on one of the machines and Windows 2008 R2 server and MS SQL 2008 R2 Server on another machine, what kind of performance might I expect to see from these machines? The facts is this series is now 3 versions behind the G7's and this series of server was built when Windows 200 Server was the dominant OS and Windows 2003 Server was just coming out. If you are running Windows 2008 R2 Server on a G4 with similar or less specs I would love to hear what your performance is like.

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• "Can't find root filesystem / error mounting /dev/root" when booting to new kernel

  - by salparadise

  I am trying to upgrade my kernel from 2.6.18-274 to 2.6.39 for some wireless card drivers. When I boot into the new kernel I get the "Can't find root filesystem / error mounting /dev/root" googling led me to this page http://fedoraproject.org/wiki/Common_kernel_problems#Can.27t_find_root_filesystem_.2F_error_mounting_.2Fdev.2Froot From what I am reading seems to be an issue with a driver for my SATA controller or HD, but I can't find what option I need to add to the kernel. Doing a diff from the old initrd to the new one gives me the following: root-> diff /tmp/kafter /tmp/kbefore 6a7,8 > lib/dm-message.ko > lib/dm-region_hash.ko 8a11 > lib/dm-raid45.ko 13d15 < lib/dm-region-hash.ko 16a19 > lib/dm-mem-cache.ko Do I need any of those? not sure if I would need dm-raid45.ko as I am not running a raid. I have the same SATA and IDE options configured for both kernels so not sure what else to look for, any help is appreciated. Additionally here is the HW info: 00:1f.2 IDE interface: Intel Corporation 82801FB/FW (ICH6/ICH6W) SATA Controller (rev 03) (prog-if 8f [Master SecP SecO PriP PriO]) Subsystem: Hewlett-Packard Company Unknown device 3006 Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 233 I/O ports at 1818 [size=8] I/O ports at 1830 [size=4] I/O ports at 1820 [size=8] I/O ports at 1834 [size=4] I/O ports at 14f0 [size=16] Capabilities: [70] Power Management version 2 root-> smartctl -a /dev/sda ... === START OF INFORMATION SECTION === Device Model: WDC WD5000AADS-00S9B0

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• Connecting multiple access points

  - by mohsen farahanipoor

  I'm working on a big project. We want to create a wireless network throughout the building with 15 floors. My idea is that we should set up one unified wireless access point at least in each floor...in case of signal attenuate, we use Access point extender/repeater. I selected DWL-6600AP from among D-Link industrial access points. I want to implement a single wireless LAN throughout the building. Is it possible to combines multiple DWL-6600 access points to achieving just a single WLAN? Can a wireless switch controller do this task? Can these Access Points interfere with each other? What is the solution? I read D-Link website's learning materials, but I am still confused. My other question is around the connecting these APs to Wireless Switch Controller - Is it possible to use power line for connecting DWL-6600 to Wireless Switch Controller device? My main goal is that clients with portable devices such as laptops should be easily connected to the network to share & have communication without any more manual configuration as they are already connected to a single network.

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• Windows 7 notebook turn off by itself, how to check if it is due to CPU being too hot?

  - by Jian Lin

  I have a Dell Studio 15 notebook, and it just started turning off by itself yesterday. Could it be that the CPU is too hot? I have had several notebooks before and every one of them I can put them on the bed without any problem. This Dell Studio Notebook, however, seems like have the air / fan outlet pointed outward from the bottom back of the notebook, so I suspect that the air is partially blocked when it is on the bed. Are there Win 7 tools that can monitor the CPU temperature, or will some 3rd party tool be needed? (I try to stick to official tools nowadays). Also, it is running Win 7 Ulitmate, there is actually no utility or background service from Win 7 or from Dell that detects when the temperature is too hot (or 95% near the max), pop out a message box giving a warning and say that the computer will go into sleep mode in 1 minute, but instead just turn off the computer by brute force (cutting out the power) right then and there? Update: it turned off right in front of my eyes -- it is not doing any windows update or anything. just normal use and jooooop, it turned off.

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• Number of routers in small community lock up and require reboot.

  - by Anthony Hiscox

  I live in a small town which has one primary ISP. Lately I have noticed that a number of wireless routers have been locking up and requiring a reboot before allowing any connections. This has affected two of my routers, my work router, and a few others. In all cases wired continued to function as usual. Often wireless clients can see the SSID but simply won't connect. I can only think of a few possibilities and was hoping someone here might be able to point me in the right direction: Our ISP is well known to be flaky, something they are doing is causing this, what that might be I have no clue it as seems to affect the wireless only. There's a power issue in town, given our remote location and reputation for crap electrical, this seems reasonable. Only one router was plugged in to a UPS, and I'm not sure of the quality. There is some bug in all the different firmware for every one of these routers (all different). That doesn't seem reasonable, unless; it's an unknown (or known) exploit or DoS of some sort being launched by a massive team of ninjas hell bent on forcing us all to be tethered to our walls by ethernet cables or; it's just been a coincidence and I'm just paranoid (this has some weight, I mean read 4 again). Anyone else experience similar issues and have some tips?

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• Weirdly high ping on direct ethernet connection?

  - by Antriel

  I bought new Lenovo IdeaCentre H430 pc and I'm having problem with high pings. Windows 7 with on-board realtek NIC. Fresh install, fully updated, drivers installed from included CD. When I start pinging router (direct 1Gb ethernet connection, 1 hop), pings start at <1ms (which is fine) and after a while they jump to 300-1000ms. I loaded up live ubuntu to test if the problem might be in HW. It's not, in ubuntu pings were always <1ms. I also noticed that when I start using connection somehow, pings go down to 1ms, but go back up when I stop using it (tested by accessing live camera feed on LAN). Power Options set to max performance. I disabled Interrupt Moderation on the NIC, didn't help. I tested it in the safe mode with networking, same problem there. It slows down our client-server based programs and I have no idea what's causing it. All I could google up was that disabling Interrupt Moderation would help, it didn't though. Anyone had similar problems? tl;nr: Computer is giving high pings to router when idle and normal pings when network is under load, it slows down our software significantly.

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• Compaq Motherboard gives "CPU Fan Error"

  - by John

  I have a motherboard for a HP business desktop dx5150 PC. The model written on the board is "MS-7050" and it is for an AMD socket 939 processor. I got everything installed in it, and when I turned it on, it showed a message stating that there was a "CPU Fan Error" (or some similar language) and then turned off. It never stays on for more than about 30 seconds, probably less. The fan had previously been working great, but I replaced it anyway with a brand new Cooler Master fan. This did not work. I then reset the BIOS with the jumpers on the board, no dice. I replaced the CMOS battery. Same error. I then replaced the entire computer power supply with a brand new Antec, same error. The fan header is keyed, and has room for 3 pins. The CPU fan is designed the same way, so its not that I'm missing a temperature sensor or anything. Can anyone give some suggestions? Especially maybe some secret keystrokes to bypass this error?

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• Mac Finder: WD My Passport won't mount

  - by Matt

  I really need your help. I have a WD My Passport 650GB (with Firewire and USB). I'm using it for almost a year now and it always worked fine. While underway I simply plug it in via Firewire - at home I connect it to my Airport Extreme to have it available as a network storage. Today I connected the hd to my macbookpro (via firewire) and NOTHING. The hd is starting (clearly making a sound and the power-indicator is flashing) but it won't appear in Finder. I also tried it with USB - no sign. I ran Disk Utility and tried to repair the disk. At first try I got a red error line saying that something is wrong with the "headers". However the repair completed with a success message saying that everything is ok. I also verified the hd. Also with a success message. I did that a few times again and unplugged it in between. Never got the error with the headers again - it's always completing and saying everything is ok. However I can't mount the drive. That is what Disk Utility is showing. Any ideas on that? I really need the files on that hd. thank you in advance!

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• Bad performance with Linux software RAID5 and LUKS encryption

  - by Philipp Wendler

  I have set up a Linux software RAID5 on three hard drives and want to encrypt it with cryptsetup/LUKS. My tests showed that the encryption leads to a massive performance decrease that I cannot explain. The RAID5 is able to write 187 MB/s [1] without encryption. With encryption on top of it, write speed is down to about 40 MB/s. The RAID has a chunk size of 512K and a write intent bitmap. I used -c aes-xts-plain -s 512 --align-payload=2048 as the parameters for cryptsetup luksFormat, so the payload should be aligned to 2048 blocks of 512 bytes (i.e., 1MB). cryptsetup luksDump shows a payload offset of 4096. So I think the alignment is correct and fits to the RAID chunk size. The CPU is not the bottleneck, as it has hardware support for AES (aesni_intel). If I write on another drive (an SSD with LVM) that is also encrypted, I do have a write speed of 150 MB/s. top shows that the CPU usage is indeed very low, only the RAID5 xor takes 14%. I also tried putting a filesystem (ext4) directly on the unencrypted RAID so see if the layering is problem. The filesystem decreases the performance a little bit as expected, but by far not that much (write speed varying, but 100 MB/s). Summary: Disks + RAID5: good Disks + RAID5 + ext4: good Disks + RAID5 + encryption: bad SSD + encryption + LVM + ext4: good The read performance is not affected by the encryption, it is 207 MB/s without and 205 MB/s with encryption (also showing that CPU power is not the problem). What can I do to improve the write performance of the encrypted RAID? [1] All speed measurements were done with several runs of dd if=/dev/zero of=DEV bs=100M count=100 (i.e., writing 10G in blocks of 100M). Edit: If this helps: I'm using Ubuntu 11.04 64bit with Linux 2.6.38. Edit2: The performance stays approximately the same if I pass a block size of 4KB, 1MB or 10MB to dd.

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• KVM Hosting: How to efficiently replicate guests

  - by javano

  I have three KVM servers each with 1 guest VM, running directly on it's local storage, (so they are essentially getting a dedicated box worth of computing power each). In the event of a host failure I would like the guests replicated to at least one of the other hosts so I can spin it up there, until the failing host is fixed. I am curious about KVM cloning. I can clone a VM live or when it's suspended/shutdown. Obivously suspended VMs will naturally be quicker to clone but these three VMs comprise three parts of a single solution, so I don't want to ever have any one of them shutdown. How can I efficiently clone these VMs between servers? I have had a couple of ideas, but are these insane or, is there a better method I have missed for my scenario? Set up a DRDB partition between box 1 and 2 where VM 1 runs from, and so is replicated between box1 and box 2, repeat between box 2 & 3, and box 3 & 1 (This could be insane, I have never used DRDB only read about it) Just use standard KVM CLI clone options to perform live clones (I'm dubious about this because I don't know how long it will take and what the performance impact will be during) Run a copy of each VM on at least one other host, and have the guest on one host export it's data to the matching guest on another host where it can import that data, scripting this on the guest) Some of other way? Ideas welcome! Side Note These servers have 4x15k SAS drives in a RAID 10 so they aren't rocketing fast, and as I mentioned, each VM runs from the host's local storage, no NAS or SAN etc. So that is why I am asking this question about guest replication. Also, this isn't about disaster recovery. Guests will be exporting their data to a NAS over a VPN, so I am looking at how I can have them quickly spun up in a host failure situation.

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• Router not connecting to the internet

  - by Peter

  I had a weird problem this morning with my router - it's an Alice Gate VoIP 2 Plus WI-FI - not connecting to the internet after more or less 1 hour online (I'm always connected with the ethernet cable). The led status lights for Power, WI-FI, ADSL, Internet, Service should be on in order to be connected and navigate online. The problem was that the leds ADSL, Internet were off and I did not know why because it never happened before. I looked at the stats in the settings and the numbers for Bytes/Packages for both Sent/Received were there and increasing but I couldn't connect to the internet. I called tech support, they checked and told me to keep the router on for 48 hours because they were checking it. I've reset it twice before and after I called tech support and it still did not work so after about 2 hours of waiting I tried connecting using WI-FI and the leds 'magically' turned on, first the ADSL and Internet(Internet led always turns on last). At this point I'm curious what could of caused this and I'm doubting that the tech-support guys did something. What could of been the problem with the ethernet cable not connecting in the first place? It always works. What do the tech support guys normally do when they tell me to keep the router on so they can 'check it'? PS: I'm using ubuntu 32 bit

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• Tomato/DD-WRT router to act as switch & only NAT some port

  - by fseto

  BACKGROUND: I have a device that must use a real IP address. Currently, my ISP uses DHCP and I can have up to 4 real IP address assigned. However, the cable modem only have 1 ethernet port and it's connected to my router (running Tomato, but can run DD-wrt or other Openwrt if required). Question stems from how I can connect the additional device, requiring a real IP? EASY SOLUTION: would be to get a switch and connect to the CM, Router, and Device. But alas, I want to avoid this route, since: my wiring cabinet in my home is drawing lots of power and heat already Device will be unprotected by any firewall unable to monitor the traffic to/from device. Besides, what would be the FUN in that? =) IDEA: So what I want to do is to configure the router, so that one of the switchport is removed from the normal br0 bridge. Instead, I want to make it behave like a switch on the WAN port. What's the best way of doing this? Should I create another bridge on the WAN & the device port? Can a single port belongs to two bridges? or would I need to create a subinterface first? Would I need a DHCP-relay? Am I expecting too much from my poor cheapie router? +------+ | CM | +--++--+ || +----WAN---------------+ | / \ Router | | BR1? BR0 | | | \ | | | {NAT} | | | / | | \ | +-P0----P1-P2-P3-Wifi--+ | +------+ |Device| +------+

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• Ubuntu - No gnome-panels, no right-click, no internet, no hotkeys

  - by Darthfett

  Hey guys, I've been using Ubuntu (Maverick 10.10) on my desktop (ATI Radeon 5830) for about 3 weeks now, but all of a sudden I am unable to even use my computer. As soon as I start up, I see my desktop, with icons, but I don't see any gnome-panels, and I'm unable to get any options if I right-click. I can start programs by double clicking them. I also cannot get an internet connection. I've tried restarting gnome-panel by killing it, using Ctrl+Alt+5 to switch to a terminal (I don't have a shortcut to one on my desktop, and no hotkeys will work), but no luck. Restarting my computer has no effect upon this (I have to manually cut the power, since I don't know the terminal command). As far as I know, I have not made any changes, and I've never had any problems in the past. This started when I was playing Minecraft, but my internet crapped out, and no amount of re-trying the connection would work. I know it was my computer, as my brother's was working fine in the other room. Any clues as to what's going on? I'm more than willing to troubleshoot.

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• XP/Intel wirelss only showing 'hpsetup' ad-hoc network that isn't there

  - by ewall

  Trying to help my friend with her work XP laptop, which recently stopped seeing any wireless SSIDs except the SSID 'hpsetup' (presumably from a wireless-enabled HP printer). Relevant information: The laptop is a Lenovo T500 (Centrino 2 chipset) with XP SP3. The network adapter is Intel WiFi Link 5300 AGN (built-in). The latest version (13.5) of the Intel drivers only are installed, not the Intel config software, so XP is using the Wireless Zero-Config manager. The wireless router is a NetGear WGR614 v7 with 802.11b/g. The SSID is broadcasting, and all the other laptops in the house can see and connect to it. On the laptop, I have tried repairing the network connection, disabling power management, turning off 802.11a & n radio, and more... but it didn't help. Some of the wireless settings are managed by Group Policy from her office (I get the "At least one of your changes was not applied successfully to your wireless configuration" message). It is enforced to connect to "Access point (infrastructure) networks only". The real kicker is that my laptop does not an SSID named 'hpsetup' here, but it can see several broadcasted SSIDs including the one we want, while my friend's laptop doesn't see any SSID except 'hpsetup'. Any suggestions?

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• What USB key would you recommend using for running a Windows 7 VM off of?

  - by Darryl Hein

  Because I can't find a good PHP editor for OSX, I develop in Windows with PhpEd. At the moment, my development time is split between a desktop and a laptop. To partially solve the problem of having 2 different environments, I have installed a virtual machine (through Virtual Box) and put the hard drive file on an external hard drive. At the moment, I've been connecting it through Firewire 800. I have 2 problems with this setup: (1) The hard drive is fairly large so to carry the laptop and hard drive I pretty much require a backpack. (2) The hard drive requires quite a bit of power and therefore reduces the battery life (by about 40%). My thought is to move the VM hard drive onto a USB key. I realize it will be slower, but as I'm just using it for PHP development, there isn't a lot of disk activity in the VM. The only really intense time is boot up, otherwise, it just about sits idle. Do anyone have any suggestions on a USB key to use for the VM? It would need to a minimum of 32GB.

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• Strange battery behavior on laptop

  - by EpsilonVector

  My laptop is behaving rather strangely lately, and I was hoping to get some idea as to what may be causing such symptoms. The problem: When charging, very minute or so it loses connectivity with the AC adapter for a split second, and regains it back immediately. When this happens the little light that indicates the computer is plugged in does flicker off and back on, but I checked the adapter by replacing the battery on my laptop, and this indeed solves the problem, so it is probably the battery which is at fault, not the adapter (I also tried to move the adapter's wire around just to make sure it had nothing to do with torn wires). I suppose that the obvious solution is to get a new battery, but as far as battery defects go- this is a rather strange one; it loses connection with the adapter, but still powers the computer, and changing the power setting to a balanced plan (was maximum performance) seem to have solved the problem too. Is there a chance this is not simply the battery, but some kind of other electronic defect? And if not, what can cause it to behave so strangely? PS I tried to recalibrate it- didn't help.

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• Known USB 2.0 devices don't install driver, but must be manually forced

  - by Darragh

  When a known USB 2.0 device is plugged in and detected, it doesn't install the driver correctly but shows a Code 28 error and lists the device under "Other Devices" in Device Manager. When view properties of this device , it shows the following status; The drivers for this device are not installed. (Code 28) There is no driver selected for the device information set or element. To find a driver for this device, click Update Driver. When updating the driver manually and selecting the appropriate driver Windows doesn't believes it's the correct driver, but you can force the installation and it works! The other condition the driver will auto-install is when the same USB device is plugged into a USB 3.0 port. Power related issues are not also causing this as I have tried vi a Docking station, USB hub. etc.. Devices tried; Jabra Headset USB-Mass Storage Device (flash disk and ext HD) MS Wireless Keyboard & Mouse USB Ethernet controller (USB-MAC controller) This is on a laptop part of a Domain with Windows 7 Ent 7601, I am logged in as a local administrator. There isn't any Group Policies blocking not signed driver or whitelisted devices on the domain. Any suggestions please feel free

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• Why can't I physically access my machine after a remote session?

  - by Steve Crane

  I have a Dell Optiplex 960 desktop running Windows 7 64-bit at work. I typically leave it locked rather than logged off when I go home, so that I'm able to remote in from home and continue working if I wish. This is where the problem comes in. If I don't remote in there is no problem and I can simply unlock the next morning. It's when I do remote in that I have a problem. Remote sessions work as expected but when I get to work the next morning the machine appears to have gone into a sleep or hibernate state, from which no amount of mouse moving or keyboard pounding will wake it. The machine is not hanging as remote sessions to it are still possible; it seems that physical access from it's own mouse and keyboard are lost. The only way to gain access is to press and hold the power switch for several seconds until the machine shuts down. Of course this means Windows does not gracefully shut down and after powering up it takes several minutes for the machine to boot and reach the login prompt; presumably while it checks the disk. Has anyone else seen something like this?

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• How do I determine how future-proof and stable a router is?

  - by Aarthi

  I mentioned in my last question that my wireless router had a bad habit of crashing. After consulting with the Super User chatroom, as well as my sysadmin, I've decided I may as well purchase a new router. However, I'm unsure how to evaluate all these tech specs that get touted about. The two things that seem to be the most important to me are: (1) keeping my router future-proof (as standards evolve and change), and (2) ensuring its stability. Unfortunately, I'm not sure what, exactly, I should be looking for in the tech specs or the item description that can give me a good idea of how stable or future-proof my decide will be. What should I look for? Can I determine stability without having to try the device out myself? Please note: I'm not a battle-hardened power user by any means, so I'll likely be reliant on the given firmware for my router. My last router lasted me like four years, so I mostly just want something that'll cover a 500 sqft apartment in New York with minimal crashing, so that I can watch Hulu in peace. And make Skype calls. If it helps, the router models that I'm currently decided between are this ASUS one and this LinkSys one.

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• Pivot Table grand total across columns

  - by Jon

  I'm using Excel 2010 and Power Pivot. I'm trying to calculate confidence and velocity for a development team. I'm extracting some information from our time and defect system each day and building a data set. What I need to do with Excel is do the calculations. So each day I add to my data set 1 row per task in the current project, estimate for that task and the time spent on that task. What I want to calculate is the estimate/actual for each task but also for each person. The trouble is that each day the actual is cumulative so I need to pick out the maximum value for each task. The estimate should remain unchanged. I can make this work at the task level with a calculated measure (=MAX(worked)/MAX(estimate)) but I don't know how to total this up for a person. I need the sum of the max worked for each task. So a dataset might look like: Name Task Estimate Worked N1 T1 3 1 N2 T2 3 1 N3 T3 4 1 N1 T1 3 2 N2 T4 5 1 N3 T3 4 2 N1 T5 1 2 N2 T6 2 3 N3 T7 3 2 What I want to see is for task T1 2 days were worked against an estimate of 3 days - so 2/3. For person N1 I want to see that they worked a total of 4 days against an estimate of 4 days so 4/4. For person N2 they worked 5 days for an estimate of 10 days. Any ideas on how I can achieve this?

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• DDoS nulling to some ips and other options?

  - by Prix

  I am looking for some information in regards DDoS in the follow scenario: I have a server that is behind a Cisco Guard and it will be DDoS'ed, I only care about a set list of IPS that by not means are the attackers. Is it possible to null all other ips but this list to actually get any response to my server or in the long run no matter what I do if they have enough DDoS power I will just go down like a flie ? Is there any recommended company out there that can actually cope with a DDoS ? My server will mainly run several clients that will get connected to a external server and all it needs access to is my local MySQL the the private network so I can access it. There will be no other services runnings such as web or ftp etc at least not to the external ips of the server if i ever have to have any of these service they will be on the private network. The MySQL will be available externally only to 1 safe ip not known by anyone but me and internally at localhost + private network. Are there any solutions ?

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• Best usage for a laptop being used as a desktop without removable batteries

  - by Senseful

  After reading the information on http://batteryuniversity.com, I realize that one of the best ways to permanently damage a lithium ion battery is to use the battery at a high temperature while it's fully charged. This is exactly what happens when you use the computer as if it were a desktop computer, since leaving it plugged in will keep the battery at 100% and using the computer will heat up the battery. This is why it's recommend to remove the battery from your laptop if you are using it is this scenario. My question is what would you do if the laptop doesn't have removable batteries (e.g. a MacBook Pro)? Should I use some kind of charge cycle such as: charge to 80%, unplug the power chord, use the laptop until it reaches 20%, then repeat the cycle by charging to 80% again? If so, which values should I use instead of 80% and 20%? (I think charging to 80% is better than 100% because of the damage that a hot battery at 100% can do, but I just made the figure 80% up, and I'm sure there's a better number to strive for which is backed by science.) I've read many of the articles on batteryuniversity.com, but couldn't find anything pertaining to this. Update: What about doing something like charge (or discharge) it to 50%, then plug it in and turn on settings which use the battery as much as possible (e.g. brightness all the way up, wi-fi on, etc.), in order to try to maintain the battery at 50% (i.e. the rate it is charging is the same as it is discharging). This will probably heat up the battery, but would make it so you don't need to constantly plug and unplug the laptop. The one bad thing is that you are taking up more charge cycles which would decrease the battery life, thus I'm not sure this is a good idea.

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• Asus K50I sound issues

  - by MrStatic

  I have an Asus K50IJ (Bestbuy) laptop and have issues with my sound. Speakers themselves work fine but when I plug into the headphone jack it auto mutes the front channel and no sounds comes out of either the speakers or the headphones. If I then unmute the channel I get sound from both the speakers and the headphones. alsamixer shows the Headphone channel as all grayed out. /etc/modprobe.d/alsa-base.conf I have tried snd-hda-intel model="asus-laptop" and snd-hda-intel model="asus" In Sound Preferences I have gone to output and changed the Connector to 'Analog Headphones' that results in no sound from either speakers or headphones. As one forum suggested I tried to comment out blacklist snd_pcsp in the blacklist.conf which resulted in no change. lspci -v shows: 00:1b.0 Audio device: Intel Corporation 82801I (ICH9 Family) HD Audio Controller (rev 03) Subsystem: Santa Cruz Operation Device 1043 Flags: bus master, fast devsel, latency 0, IRQ 45 Memory at fe9f4000 (64-bit, non-prefetchable) [size=16K] Capabilities: [50] Power Management version 2 Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+ Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00 Capabilities: [100] Virtual Channel Capabilities: [130] Root Complex Link Kernel driver in use: HDA Intel Kernel modules: snd-hda-intel

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• WOL doesn't work if set to anything other than `a` but this setting makes it boot all the time

  - by Elton Carvalho

  I manage a small "cluster" of 4 Xeon machines with Intel boards in my lab. They are all plugged to a 5-port 3-Com switch with static IP addresses like 10.0.0.x. They are all running OpenSuse 11.4 and their /home/ is served by one of the machines (node00) via NFS. They are plugged to an UPS that can keep them on for ca. 15 minutes, but there are lots of electric shortages due to "unscheduled maintenace" that are longer than this. So they end up being powered down without notice. If I set the BIOS to turn them on after power shortages, the issue is that they all boot at the same time and, if node00 decides to run fsck in the /home/ partition, it does not finish booting before the others try to NFS mount their /home/. I am trying to make wake on lan work, so I can choose to boot the NFS clients only after the server has successfully booted. The problem is that when I run ethtool I get an output like this: Supports Wake-on: pumbag Wake-on: g Theoretically, it is set to wake on MagicPacket(tm), according to the manual. But sending the WOL packet using wol -i 10.0.0.255 $MACADDR does not wake up the box after I shut it down with halt. The ethernet link led blinks after I send the packet, so it appears to be getting to the machine. However, if I set it up with ethtool -s eth1 wol bag, the machine always wakes up right after halting, even if I don't send the Magic packet. This means that the device can wake up with LAN activity, but seems to be ignoring the magic packet. Setting wol ag does not wake the box with the MagicPacket. Does setting wol a mean that it should boot with any broadcast message? How can I diagnose the issue of the machine not waking up with the MagicPacket even though I am sending it and it's set up to wake up with it? Thanks in advance!

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