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• buggy mouse click after a while

  - by sputnick

  The cursor of my mouse is moving as well on my twin view, but after a WHILE, or if I start kde with runlevels (I don't know why, but startx works better) I can't click anything. I have had replaced the mouse with another one, but it's the same problem, so it's not a hardware problem. The problem occurs both with gnome and kde. My config : PC Dell Optiplex 780 archlinux x86_64 (up to date) xf86-input-evdev 2.6.0-4 xorg-server 1.11.2-2 kernel linux-3.1.1-1-ARCH My Xorg log doesn't contains "EE" string for errors. Any clue ?

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• How to calculate order (big O) for more complex algorithms (ie quicksort)

  - by bangoker

  I know there are quite a bunch of questions about big O notation, I have already checked Plain english explanation of Big O , Big O, how do you calculate/approximate it?, and Big O Notation Homework--Code Fragment Algorithm Analysis?, to name a few. I know by "intuition" how to calculate it for n, n^2, n! and so, however I am completely lost on how to calculate it for algorithms that are log n , n log n, n log log n and so. What I mean is, I know that Quick Sort is n log n (on average).. but, why? Same thing for merge/comb, etc. Could anybody explain me in a not to math-y way how do you calculate this? The main reason is that Im about to have a big interview and I'm pretty sure they'll ask for this kind of stuff. I have researched for a few days now, and everybody seem to have either an explanation of why bubble sort is n^2 or the (for me) unreadable explanation a la wikipedia Thanks!

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• IIS 6.0 FTP Folder Permissions

  - by Beuy

  I have a IIS FTP website setup like this \ftp\users\domain\public\public Software that runs on clients computers logs into the FTP server by specifying domain\public and moving to public, it then uploads or downloads files / folders into that area. I want to restrict permissions on \ftp\users\domain\public so that nothing/nobody can write files or folders here, only to \ftp\users\domain\public\public. I setup the NTFS permissions of the folder to remove domain\users, public and server\users to not have modify right, yet I can still upload/modify files. I have disabled inheritance from the parent folder of \ftp\users\domain\public as well. Any ideas on what I'm missing here? P.S I know this is a stupid setup and makes no sense, it's some bizarre legacy application that I need to migrate to a safer environment until it can be replaced.

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• How to clean sys.conversation_endpoints

  - by Manjoor

  I have a table, a trigger on the table implemented using service broker. More than Half million records are inserted daily into the table. The asynchronous SP is used to check sveral condition by using inserted data and update other tables. It was running fine for last 1 month and the SP was get executed withing 2-3 seconds of insertion of record. But now it take more than 90 minute. At present sys.conversation_endpoints have too much records. (Note that all the table are truncated daily as I do not need those records day after) Other database activities are normal (average 60% CPU Utilization). Now where i need to look?? I can re-create database without any problem but i don't think it is a good way to resolve the problem

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• Computer not displaying anything

  - by Justen

  The computer in question worked last week. It's brand new, never been connected to the internet, up-to-date parts, etc. Last week, I installed some 3D software on it, then shut it down and waited for the license files that arrived this week. I've done this to 4 other PCs with the same hardware and software. I've tried: Hooking it up to 3 different monitors using different video cables 2 other graphics cards and a handful of other things like switching which port it's plugged into before and after a restart. I have the driver disc, and a windows reinstallation disc, but they won't do me any good because no display at all for any interval of time. All the fans are moving: psu, gfx, cpu etc, so I don't believe it's a power issue. Here are the specs I know of: 4GB RAM 8800 GTX 700w PSU Intel dual core (not sure of model) Anyways, I'm open to ideas.

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• Numlock on when computer is off

  - by George Duckett

  I have a desktop PC which was recently moved. Since moving I've noticed that even while the PC is turned off (but wall socket turned on) the NumLock LED on the keyboard is on. It may have been doing this before the move, but I've only noticed it now. Maybe it matters that the keyboard is connected via a shared mouse/keyboard PS/2 port and I'm running Windows 7. I've not checked whether the LEDs are just keeping whatever state they were in when I turned the PC off but will do this if that information could be relevant. Why does the led stay on when the PC is turned off and how can I prevent this?

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• optimistic locking batch update

  - by Priit

  How to use optimistic locking with batch updates? I am using SimpleJdbcTemplate and for single row I can build update sql that increments version column value and includes version in WHERE clause. Unfortunately te result int[] updated = simpleJdbcTemplate.batchUpdate does not contain rowcounts when using oracle driver. All elements are -2 indicating unknown rowcount. Is there some other, more performant way of doing this than executing all updates individually? These batches contain an average of 5 items (only) but may be up to 250.

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• Smoothing Small Data Set With Second Order Quadratic Curve

  - by Rev316

  I'm doing some specific signal analysis, and I am in need of a method that would smooth out a given bell-shaped distribution curve. A running average approach isn't producing the results I desire. I want to keep the min/max, and general shape of my fitted curve intact, but resolve the inconsistencies in sampling. In short: if given a set of data that models a simple quadratic curve, what statistical smoothing method would you recommend? If possible, please reference an implementation, library, or framework. Thanks SO!

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• EBS+RAID10+XFS slower than EBS+RAID10+EXT3 using MySQL?

  - by Johann Tagle

  We're currently using EC2 with 16 EBS volumes in RAID10 configuration for our MySQL data. I know some people don't recommend to put EBS volumes to RAID but that's not what I'm concerned about at the moment. Current format is ext3, but we're experimenting with moving to xfs, given many reports that it is faster. However, we're actually experiencing a performance degradation when the partition was converted to xfs - a benchmark run with inserts, updates, selects and deletes was more than 10 seconds slower using xfs. Any idea what could be the problem? Below is the fstab entry (really only changed ext3 to xfs). Database tables are innodb and we are using innodb_file_per_table. /dev/mapper/vg_data-lv_data /data xfs noatime 0 0 Thanks.

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• Using mod_wsgi with mpm_itk: socket permission issue

  - by djechelon

  I'm using mod_itk as MPM for increased security in shared environment. I also have a Firefox Sync Server within one of the VHosts I host. That vhost is restricted to a certain user via AssignUserId user group. The problem is that the socket /var/run/wsgi...whatever.sock is chmodded srwx------ and owned by Apache's wwwrun. While I configured the vhost with WSGIProcessGroup sync WSGIDaemonProcess sync user=djechelon group=djechelon processes=1 threads=5 I still get the error that Apache wants to access a socket that is not accessible and because of this gets an error. Is it possible to configure mod_wsgi in order to create different sockets with different owners for different applications or to chmod its socket in a different way (less secure)? Currently, I'm running Firefox Sync as the only WSGI application. Moving it to a vhost that doesn't AssignUserId could solve this problem but will force me to change URL (and buy an additional SSL certificate), so I wouldn't consider this

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• Network connection through a wall

  - by BCS

  I have a place where I want to set up a network connection through a normal residential wall where I can't cut any holes. I don't want to just set up a wireless system. Does anyone make a device that you place on either side of a wall to hook up a connection? Preferably something that can do 100Mb full duplex and can't be eavesdropped on with common hardware? The situation is that I'm moving into a new place (that I'm renting, so I can't do any cutting) and the POP is in one room and I have all the equipment is in another room.

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• Recovering files that do not appear in the Recycle Bin, but are in the $Recycle.bin folder on external drive

  - by Zach Morgan

  Problem: I have an NTFS external drive with a $Recycle.bin folder on the root (E:/$Recycle.bin/) that has about 70gb worth of data. For whatever reason, the folder is no longer a hidden system file and no Windows machine I have used the drive on will show the files in the actual Recycle Bin. What I Want To Do: I want to atleast view the recycle bin files from this external, and all of the help articles I have read just talk about deleting the folder all together. I plan on reformating the drive, but first I need to see if there are any important deleted files. What Didn't Work: Recuva - didn't see any of my files Resetting the external's Recycle Bin via command prompt and moving the old $Recycle.bin files into the new external $Recycle.bin folder (I didn't read this anywhere, just made it up on my own)

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• BSOD on windows 7 with SSD during boot after improper shutdown

  - by Bob

  I have a BSOD on windows 7 with SSD during boot after improper shutdown (while windows animation logo is moving). The computer restart imediatly after BSOD, and windows proposes to launch startup repair (if i do it, it takes +-5min and fixes the problem : computer starts normally). However, after any new improper shutdown, i got the same problem. Remarks: If i unplug, re-plug the SSD whyle system is shutdown, i have the same problem. If i reproduce the situation with old HDD, i havn't the problem Previously, i had a different problem: BSOD when waking up after sleep, which was fixed by installing drivers (ethernet, usb, graphic card) I have made ram chech and ssd check and found no problems Starting with safe mode after improper shutdown causes a BSOD at loading of classpnp.sys Configuration: System: HP compaq 8510p SSD: OCZ vertex-2 2.5 Boot options: SATA native mode - Enable, HDD transalation mode - LBA-assisted

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• Wireless connection switches off IP address

  - by Sanjay Gupta

  I have a Lenovo laptop with windows XP and a wireless connection at home. The wireless connection works when initially I switch on the computer. but if I leave it for even 5 minutes, the wireless is gone. Then I have to shut it off and start computer all over again, waiting for 5 minutes. Even if the wireless speed is 48Mbps or better, it gives the message "Renewing IP address" and gets stuck there not moving to the next stage. Other laptop in the household works fine and can be left on. Why does this happen ? I suspect that IP address is the problem and somehow is not registered in all the necessary files.

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• Building a subquery with ARel in Rails3

  - by Christopher

  I am trying to build this query in ARel: SELECT FLOOR(AVG(num)) FROM ( SELECT COUNT(attendees.id) AS num, meetings.club_id FROM `meetings` INNER JOIN `attendees` ON `attendees`.`meeting_id` = `meetings`.`id` WHERE (`meetings`.club_id = 1) GROUP BY meetings.id) tmp GROUP BY tmp.club_id It returns the average number of attendees per meeting, per club. (a club has many meetings and a meeting has many attendees) So far I have (declared in class Club < ActiveRecord::Base): num_attendees = meetings.select("COUNT(attendees.id) AS num").joins(:attendees).group('meetings.id') Arel::Table.new('tmp', self.class.arel_engine).from(num_attendees).project('FLOOR(AVG(num))').group('tmp.club_id').to_sql but, I am getting the error: undefined method `visit_ActiveRecord_Relation' for #<Arel::Visitors::MySQL:0x9b42180> The documentation for generating non trivial ARel queries is a bit hard to come by. I have been using http://rdoc.info/github/rails/arel/master/frames Am I approaching this incorrectly? Or am I a few methods away from a solution?

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• How do you manage Labeled and All-Mail unread mails in Thunderbird with a GMail IMAP accounnt?

  - by Edward Beach

  I use Thunderbird with gmail via imap and do so with multiple accounts. On the gmail side I have filters that will automatically assign labels to incoming mail and archive it moving it out of the inbox. On the Thunderbird side it will see the new mail appear in the corresponding folder and the all mail folder -- that's fine but my problem is that they're both marked as unread. Since I have many accounts I use the unread mail view in Thunderbird's folder panel and what I see is both folders highlighted as unread. When I read the message in one folder the other only get marked as read I click on it and Thunderbird does another imap transaction. Is there a configuration that will recognize the same mail in two different folders automatically?

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• Mighty Mouse is jumping around on screen

  - by Nils Riedemann

  Hi there, I have a really annoying problem with my mighty mouse since a couple of weeks now. When moving my mouse (mightymouse) sometimes it jumps (about once in 30minutes) directly to a (propably) random spot of my screen. I cleaned the mightymouse several times and there is definately no hair or the like, and the desk is not the problem as well - I have the same problem with my other mighty mouse at home. Since I don't have any other mouse i couldn't test whether this relates to the mighty mouse or the mouse in general. Has anyone experienced such issues as well? Is there a solution? Greetings btw: Mac OS X 10.6.4

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• Performance Counters in Server Development

  - by Mubashar Ahmad

  Dear Gurus All you be agree with the value and worth of Performance Counters while developing and maintaining a server kind application I would like to know what is the best way to implement those, Specifically using C#? Usually performance counters have the following attributes They are shared global Writing requires locks to ensure Synchronization Reading Some times requires locks too. Is it better to update them Asynchronously and what is the best way to make them so. (I am planning to use the ThreadPool.QueuWorketItem function, pls tell me you opinion on this too.) If my question seems a bit vague can you just take the example of a HelloWorld Wcf service and i wanted to know following how many times its being hit overall and within a certain period Average/min/max Response Times overall and within a certain period. Moreover if any one knows about the Specialized way provided by DotNet or WCF then please let me know as well.

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• IIS/SMTP - unable to move emails from inetpub/mailroot/Queue due to file lock

  - by Bryan Roth

  I have a listener that processes emails in the inetpub/mailroot/Queue directory. Once the listener is done processing an email it proceeds to move the email to another directory. However, moving the email is not possible due to a file lock by the process inetinfo.exe. I have noticed that this file lock is released after a period time that ranges from several hours to several days. You can see that the Queue directory can get pretty full over time. The only way I have been able to work around this is by manually stopping and starting my SMTP virtual server in IIS. Is it possible to release this file lock programmatically? If not, is it possible to expedite releasing this file lock?

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• change email address format with minimal disruption

  - by femi

  Hello, all the email addresses in my organization are in the format [email protected]. this was started when we were a small organization. Now we have grown and need to use something a bit more professional like [email protected] how can this change be implemented with minimal disruption? We currently only use smarteremail. Could recieving ONLY with the old and replying with the new be a solution..till we wean our recipients off the old email address? Any suggestions are welcome. How will moving to exchange help in this instance? Can it be configured to automatically send out using a different address? Thanks

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• SharePoint Designer prompts for credentials when edited from IE8

  - by Rob Nicholson

  Our intranet is hosted using the free SharePoint services on Windows 2003. Consider the following page: http://vserver003/help/technology/multimedia/multimedia.htm On selecting "Edit with Microsoft Office SharePoint Designer" from IE8, SPD launches, opens the website and then the selected page - all is well. In order to make moving the intranet easier, we've set-up a DNS setting called intranet.company.local so you can also access the intranet that way: http://intranet.company.local/help/technology/multimedia/multimedia.htm However, when you edit this page, SPD designer prompts you for credential, i.e. domain\username and password. If you enter the details it opens fine. If you don't enter the details, the page still opens but not the website. Any ideas have to get around this prompt? Haven't a clue where to start looking. Thanks, Rob. PS. The same prompt occurs if you use the physical IP address.

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• Why use Google Apps Sync for Outlook to sync email?

  - by Howiecamp

  I currently use Outlook 2007 against an Exchange server for my email and will be moving to Google Apps. There are a number of ways to import your existing email and calendar entries into Google Apps Gmail (e.g. including the Google Apps Sync for Outlook tool), the Google Email Uploader, and copying messages using an IMAP client) so I'm covered on the import side. I'm trying to understand the use cases for the Google Apps Sync for Outlook tool http://mail.google.com/support/bin/topic.py?topic=23333 with respect to email and calendar entries. The description says it syncs your Outlook email and calendar items with Google Apps, but doesn't using Outlook as an IMAP client against Google Apps do the same?

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• How Long: Converting HTML to Jooma pages

  - by George

  Hello Everyone, I would really appreciate your help with finding out how long it takes a 1-3 year experenced programmer to convert a few HTML pages into joomla 1.5 dynamic pages. I know that some of it depends on how complex the pages are but i'm talking about average pages. That's my first question, my other question is how long will it take a 1-3 year experenced programmer to install all of these componants: Video module, photo gallery module, vertuemart shopping cart. I pay programmers to do this work but i have to make as sure as i can that i'm not over paying them. Thanks in advance for answering these two questions...George

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• Ubuntu 9.10: switch in KVM, mouse is detected but not usable immediately

  - by CarlF

  I use a KVM switch to jump between my tower and laptop, both placed on my desk. With Ubuntu 9.04 this worked perfectly. In 9.10, when I switch to the tower, then back to the laptop, the mouse is detected (as shown by /var/log/messages) but moving it has no effect. If I use Ctrl-Alt-F1 to switch to the TTY, then Alt-F7 back to Xorg, the mouse starts working. The tower is running Windows 7, but that shouldn't matter. Sometimes, but not other times, the USB keyboard on the KVM switch is also not usable and I have to use the laptop's built-in keyboard to switch to the TTY. The laptop has two monitors, the built-in and an external. It's (obviously) the external panel that is attached via the KVM switch. Any suggestions? Report to Canonical as a bug?

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• How should I measure Concurrent Licence Usage

  - by Andrew Wood

  Hi I have detailed stats on user access to my system detailing login and logout times as well as machine used, network username etc. I am in need of measuring what I would term a concurrent user licences level based on this information. Now I could take the maximum logged in for any 1 day in a 3 month period say 170 or I could take the average say 133. Does anyone have or know of a formula for working this out or is it as simple as the high water mark which is 170 in my example. A client has recently gone from an unlimited licence to a concurrent licence so I am faced with the task of setting the initial licence level. There is potential for more licence sales in the future so I don't want it set to high and I do want it based on historical data that the system collects rather than guess work.

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