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• Xen VGA passthrough: is it possible to have dual GPU's with single monitor

  - by user489481

  I hate dual-booting between Windows when I want to play a game and Linux when I need to work. I don't fancy running Linux in a VM and Wine almost never works for me. So, I'm thinking about buying a new mainboard and CPU that is compatible with Xen's VGA passthrough and HVM virtualization. I want to be able to switch between the Linux Dom0 and Windows DomU with ease, but the problem is I need two GPU's and have only one monitor. Right now I have a nVidia GTX 260 in my PC, but I also have a Radeon 4850 sitting in my closet that I was going to sell. My question is, can I salvage the Radeon card to run the Dom0 and have the nVidia card run the DomU while having some kind of device/software to connect them a single monitor? Power supply and airflow issues aside. If not, what would you suggest? Is this even possible?

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• Not loading the object caused EF4 (code first) to remove the relationship

  - by Lavinski

  Firstly this is a EF4: Code First - Property Loading question. I'm loading an object like so var item = Context.Table.Find( update.Identifier ); This object has a property Relationship so a table has a Relationship object. Now i'm updating my item but my Relationship object is not toched (and therefore not lazy loaded). Now here's the problem .. I save my item and my relationship to the Relationship object is deleted, apparently the model thinks i set it to null. However it all works if I look at the property before saving. So I'm looking into LoadProperty or doing a query and using Include. Has anyone else come across this issue and how did you get around it?

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• How to save derived type (TPT) in Entity Framework?

  - by Peter Stegnar

  I have problems with saving derived type (TPT) with Entity Framework to database. Let's say I have base entity Animal and derived type Dog. I want to save Dog entity. I thought that I could do it like contex.AddToDogs(), but contex contain only base entity - Animal. So I can only save Animal object - contex.AddToAnimals(). I have also tried with contex.AddObject("Animals", dogInstance), but I get the following error: The member with identity 'NavigationProperty' does not exist in the metadata collection. But I have add EntityReference to the "NavigationProperty". So how to save derived type in EF?

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• Black screen on Windows 7 right after opening Google Sketchup or Minecraft

  - by Aero

  I get a black screen on Windows 7 right after opening Google Sketchup or Minecraft. I presume there are other applications that cause this too - but I have not tried to open them. The window initially stops responding for a few seconds, before I get a black screen and my Skype call ends abruptly. I have tried waiting for a few minutes but nothing happens. I have to power down my computer and then boot it up again. This is becoming an annoyance, and I don't know what's causing it. Here are my specs, if it helps: My graphics card is an ATI RADEON XPRESS 1100. If you need any more info or if I've missed anything please ask. Thanks :-)

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• NHibernate auditing in disconnected mode

  - by Ciaran

  I'm developing an app with a Silverlight UI, transferring my domain objects over WCF and persisting them via NHibernate. I'm therefore working with NHibernate in a disconnected mode. I'm already using the NHibernate PreUpdate and PreInsert EventListeners to perform some metadata operations (updating Create/Update date, created/updated by etc) and they are working fine. I now have a requirement to perform data logging on some of my domain objects. So I will need to have an audit table that has a before-save and after-save state of certain entities. I had wanted to use the @event.Persister.OldState and @event.Persister.NewState to perform this logging, but because I am in a disconnected scenario (using different Sessions from when data is retrieved to when it is persisted), @event.Persister.OldState is null when I am saving my changes back to the database. How is anyone else doing data logging in a disconnected scenario with NHibernate?

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• Laptop with Windows 7 turns on spontaneously while being in "Sleep" state

  - by alexb

  I own a laptop(HP Pavilion DV7) with Windows 7 installed for already half a year. Usually when I finish my work I do not turn machine off - closing is enough to get is into "Sleep" state. Generally it's okay for me, but recent several days laptop was turning on in night spontaneously, while I was sleeping. I haven't installed any app with "turn-on by schedule on when_dooes_pc_wants"-like features. Checked if there are some "Wake-On-Lan"-like settings in BIOS, haven't found ones. The power-cable is always plugged-in. Does someone have any suggestions regarding that? p.s. laptop is placed right near by bed, so when it turns-on on night - it is quite annoying and a bit scary. I think it's trolling me, please help to stop it :) Thanks.

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• is it okay to use random URLs instead of passwords?

  - by stew

  Is it considered "safe" to use URL constructed from random characters like this? http://example.com/EU3uc654/Photos I'd like to put some files/picture galleries on a webserver that are only to be accessed by a small group of users. My main concern is that the files should not get picked up by search-engines or curious power-users that poke around my site. I've set up an .htaccess file, just to notice that clicking on http://user:pass@url/ links doesn't work well with some browsers/email clients, prompting dialogs and warnings messages that confuse my not-too-computer-savy users.

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• User for Public Network

  - by user71604

  my computer can catch the signal for many Access Points for the same network, while the network has problem with internet connection in some APs and it's working in others "all APs have the same SSID" Please advice if as i user i can force my computer to connect with specific AP neither than to go with the one with higher power (through MAC adress or IP)?. I am sure that my computer catch more than 10 signals for APs"All with same SSID". I am using windows 7 home primume 64 bit. as a user i dont have access to the AP config.

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• Dell XT on Windows 7 never recovers from sleep

  - by user39408

  My Dell XT, after upgrade to windows 7 ultimate seems to never recover from a sleep i.e. opening the lid shows a flicker, and then all lights go off. When I press the power button long enough it reboots and says that Windows had a serious error, blah blah (but no BSOD). Hibernate doesnt cause any problem, and that is what I am doing as default. Any idea how to debug more and fix it. Looked around (on web) for answer, tried related solutions (hotfixes for similar but not same problems) etc, but noting fixes this.

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• How to tell iPhone NSURLConnection to abort

  - by Jahmic

  I have an app that makes moderate use of NSURLConnection. These async calls eventually finish and release properly (it looks like), but sometimes it takes some time for them to finish. So, there are times when I exit the app, (note, not just sending it the background), that some of these connections are still active. If I immediately restart the app, the app freezes on startup. (didFinishLaunchingWithOptions never seems to get called). While I'm not certain these connections are the issue, it would probably be good to terminate or cancel any remaining. Any suggestions on how to do this? Bonus points on how to debug the restart also. (I'm already saving NSLog statements to a downloadable file)

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• JSF - database character encoding

  - by wheelie

  Hi there, I have a Java Web application using GlassFish 3, JSF2.0 (facelets) and JPA (EclipseLink). The problem I'm facing, is that if I'm saving entities to the database with the update() method, String data loses integrity; '?' is shown instead of some characters. The server, pages and database is/are configured to use UTF-8. After I post form data, the next page shows the data correctly. Furthermore it "seems" in debug that the String property of the current entity stores the correct value too. Dunno if NetBeans debug can be trusted; might be that it decodes correctly, however it's incorrect. Any help would be appreciated, thanks in advance! Daniel

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• Torrents: Can I protect my software by sending wrong bytes?

  - by Martijn Courteaux

  Hi, It's a topic that everyone interests. How can I protect my software against stealing, hacking, reverse engineering? I was thinking: Do my best to protect the program for reverse engineering. Then people will crack it and seed it with torrents. Then I download my own cracked software with a torrent with my own torrent-software. My own torrent-software has then to seed incorrect data (bytes). Of course it has to seed critical bytes. So people who want to steal my software download my wrong bytes. Just that bytes that are important to startup, saving and loading data, etc... So if the stealer download from me (and seed it later) can't do anything with it, because it is broken. Is this idea relevant? Maybe, good torrent-clients check hashes from more peers to check if the packages (containing my broken bytes) I want to seed are correct or not? Thanks

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• Spring mvc: controller returns [][], usable in jsp with foreach, but how to bind?

  - by Joe

  I'm building a spring mvc application. Now the problem I have is the following. I have a controller which adds a DayInfo[][] to my ModelMap. (DayInfo has an id, a title (String) and Text(also String). Now the problem I have is that I have no problem displaying this DayInfo[][] with foreach tags in my jsp. However I'm outputting the Title property as an input box(type text), and I'd like to be able to update this value (and thus saving it to be a database but that shouldn't be a problem). However I'm having trouble with binding this value to the input box so that it is actually returned to the controller. If anyone has some advice it would be welcome.

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• Portable Display doesn't work anymore

  - by RipCord

  My USB portable monitor will not work since I installed the hard drive onto an HP laptop. I have installed all the new hardware drivers and do not have any more device issues in device manager view. My old laptop was a lenovo. The new one is an HP. The system seems to recognize devices that I connect via, usb but the portable display still does not show anything on the screen. It is probably a conflict in the registry but I'm not sure how to find it and the Power User does not have the luxury of letting me troubleshoot for hours to isolate the problem.

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• Printing saved HTML to jsp keeps getting corrupted

  - by JWL

  I have a JAVA object where I save a HTML string value I call message. The saved data looks like the below, You have received a new <a href='' onclick='return popupRentalView('5282053859835904');'>Rental Request 5282053859835904</a>. Please view your open orders. But when printed to the JSP file and displayed at runtime using <%=pm.getMessage()%> or <%out.print(pm.getMessage());%> The actual html code comes out all messed up, You have received a new <a 5282053859835904');'="" onclick="return popupRentalView(" href="">Rental Request 5282053859835904</a> . Please view your open orders. Any thoughts on why the displayed string does not match the saved string? JAVA code for saving is note.setMessage("You have received a new <a href=\"\" onclick='return popupRentalView('" + requestId + "');'> Rental Request " + requestId + "</a>. Please view your open orders.");

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• If an old Exchange server is not part of a domain, does that imply that it can be safely removed without affecting mailflow?

  - by Bigbio2002

  We are doing some cleanup, and there is an old Exchange VM hanging around that we want to get rid of. We do not have the local admin credentials, but we can ascertain that it is not part of the current domain. Seeing as the new production Exchange server is working fine, is it safe to power off and remove the old server? *I should probably note that this is not an Edge Transport server. There was an upgrade to Exchange 2013 at some point in the past, and there is only one functioning Exchange server now.

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• Can the onborad LAN cause computer shutdown

  - by user1146320

  I have P4 processor with nvidia card. Now if i don't connect to internet then my computer stays on for as much i can like 4-5 days. But if i plug in the ethernet wire. Do some surfing and leave computer as it is. Then computer fails. I mean The display on screen gets off Looks like something stopping the power supply to Harddisk. But motherboard stays on , FAN is still running , i can eject CD drive as well. But no display on monitor. I have to turn off and then turn on again. I tried formatting windows XP but again same problem

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• understanding memory mapping in directx

  - by numerical25

  So my question is ... " When your using the mapping feature to write into a memory buffer, are you really just saving the whole procedure into a queue so directX executes it when finished with other tasks???" I ask this question because this is my perception of mapping when writing to a buffer. I just want to make sure my perception is correct. I understand that the monitor moves extremely slow in compared to the processor, and I am sure the processor can execute 10 times the amount the screen can refresh. So is this one of the reason you should map when writing to a buffer. so each procedure can be done in a orderly fashion. If someone could elaborate, that would be great. thanks

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• Does Win7 VPC negate need to re-install?

  - by justSteve

  I fear i have an impending hardware breakdown coming ... the last time the box booted i had to power off and on a couple times before windows loaded. Seems fine when up and running. So i'm preparing to install new hardware and would like to bring over the currently installed image. From what i've read of VM capabilities of VM i shouldn't have to re-install? VM seems most applicable to data centers and enterprises. I'd like to see some coverage of the tricks for SOHO users.

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• Why do date manipulation in Java with milliseconds?

  - by staticsan

  I was recently faced with the problem of calculating the number of days from two dates in Java (without using joda, I'm afraid). Searching on the 'net shows most answers to this question say to get the milliseconds of the two days and convert that to days, which I found appalling. However, a scant few show a different approach: use a temporary variable to count how many times it takes adding 1 day to the first date to get to the second. This leaves the conversions to the code that does it best: the library. Why do so many people advocate the first? In another project, I had previously encountered numerous subtle date calculation problems involving time-zones, daylight-saving and once even leap years using seconds to do date comparisions and calculations. All these went away when all the comparison and calculation code was rewitten to use the language libraries. (This was in PHP, though, where the libraries are structured quite differently to Java.) So I'm understandably reluctant to use this "common wisdom" in the world of Java about comparing dates.

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• Best directory to store application data with read\write rights for all users?

  - by Wodzu

  Hi guys. Until Windows Vista I was saving my application data into the directory where the program was located. The most common place was "C:\Program Files\MyApplication". As we know, under Vista and later the common user does't have rights to write under "Program Files" folder. So my first idea was to save the application data under "All Useres\Application Data" folder. But it seams that this folder has writing restrictions too! So to sum up, my requirements are: Folder should exist under Windows XP and above Microsoft's systems. All useres of the system should read\write\creation rights to this folder and it subfolders and files. I want to have only one copy of file\files for all useres. Thanks for your time.

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• Open original Microsoft Office document (not "version 1") on Mac OS X Lion restart

  - by FlyingMolga

  My MacBook Pro running Lion has been frequently freezing lately, and I've had to restart with the power button. When Lion starts up again, the Microsoft Office applications that were running start and load different autosaved versions of the documents I had open (i.e. it does not open abc.xlsx but [version 1] of abc.xlsx). Sometimes it also opens the original files. Several times I've inputted data into these "version 1" files, only to try to save it and realize that it isn't the original file and is sometimes missing data that is contained in the original file. Is there any way to make autorecover open the actual document with the unsaved changes, instead of making a new temporary version?

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• Ubuntu 9.10 freezes when HDMI port is connected

  - by Felipe Hummel

  I have a Sony Vaio FW350 with a HDMI output. I'm trying to use it under Ubuntu 9.10 with a LG LCD monitor 21,5'. The laptop has a Intel 4500 video card. I've tried two approaches: Boot the laptop with the HDMI cable connected and monitor turned on. Result: LCD Monitor keeps turned on but the whole screen is black and Ubuntu do not seem to be initializing. Boot Ubuntu until the end. I then connect the HDMI cable into the Laptop. The mouse and the whole system freezes. In both cases the only way to turn off the laptop is holding the power button. I've looked around the internet for similar problems, but only found workarounds for the same problem with VGA input, not HDMI. I also tried to use metacity before connecting the cable, but still got the same result. Any hints?

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• EXT4 external hard drive for use with multiple systems

  - by EXTdumb

  I recently bought a external hard drive to store some data on. I use Linux but I am not a power user. If I format the drive to EXT4, is it possible for the permissions to ever screw up and I lost access to my data? I will be plugging the drive into several different linux based computers at work and I frequently hop distros on my main home machine. I need to make sure I don't lose any data because I overlooked something. I am not familiar with EXT 3 or 4. So far I have done this : Formatted drive to EXT4 ran gksudo thunar and changed the permissions to my user account and all settings to read/write Wrote all the files I need to the drive I really appreciate any help.

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• "Device Not Ready" when attempting to connecting an old (DOS) hard drive to windows 7

  - by Christopher Vigliotti

  I have an old Western Digital Caviar 2540 hard drive that I am attempting to connect to a Windows 7 machine by using a Bytecc BT-300 USB 2.0 to IDE/SATA Adapter. I'm connecting things in the right order (power, then sata, then usb) and the jumper settings on the drive are at present set to slave, but am still having an issue. I am recieving a message that the drive is not initialized. When I go into Computer Management I can see the drive (as "Disk 5, Unknown, Not Initialized"), but when I attempt to initialize it or right-click and select "Offline" It tells me that "the device is not ready". Is there something that I can to to get around this, connect the drive and copy the data that I need off of this drive? Is there a third party tool available that I can use?

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