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• Unable to login into CentOS

  - by Rendl

  I had setup a multinode cluster using CentOS with VMware yesterday. Today when I reboot the nodes I get the below error on startup. "there is a problem with the configuration server status 256 centOS" (/usr/libexec/gconf-sanity-check-2 ) I am unable to login as root or any user as the screen is frozen. The solutions online is to change the permissions for some tmp files. My problem is I am unable to access the terminal as I cannot login. Also on reboot I do not have any recovery options in CentOS. I only see command line GRUB. I am new to linux and Hadoop.Pls help asap.

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• how to google a symbol keyword like "$?"

  - by ZhengZhiren

  i saw a trick in a book: in a linux shell, we can use &? to get the return value of a command. For example,we run a command,if it exit normally, the return value is 0. And then we type $?,we will get 0 in the screen. i want to google this kind of usage, so i have to type these two symbol $? in the search blank.But the search engine just return nothing to me... i have looked at the google help page, but still can't find a solution. so my question is: how can i search with this kind of keyword. or if you can give me some advise of the usage of $? or sort of thing, that will be also appreciated.

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• Image doesn't fill monitor when connected via HDMI

  - by russau

  Connecting a Dell Studio Slim to a Dell ST2210 21.5" monitor. The PC has a ATI Radeon HD 4350 video card. The video card has DVI and HDMI connections. When I connect with the DVI everything works fine. When I connect with the HMDI the image doesn't fill the screen, i.e. there's a approx 1 inch black border around the image. Win7 tells me the res is 1920x1080 (the native res of the monitor). Tried rebooting, no luck.

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• FreeBSD 9 (amd64) reboot/shutdown process is very slow

  - by nbari

  I have a Dell Poweredge 2900 III with FreeBSD 9 (amd64), the server uses mfi wich handles a raid10, I had to reboot the server, but notice that either when rebooting or shutting down the server, something is going wrong, besides taking to much time to reboot/shutdown, after rebooting I notice that that some ldap instances within some jails could'nt start and this was because the database was corrupted. This make me think that probably something was wrong with the disks or mfi card, but checking the disk array / logs everything seems to be working fine. My set up is something like this: Host server has the minimum base of FreeBSD 9 amd64, within I create some jails, the ones contain services like mysql, email, and some others ldap. With FreeBSD 7 and 8 I didn't notice this behavior but with FreeBSD 9 something is not working well. I did a clean installation of FreeBSD 9 and root filesystem is using ZFS. Attached is an image hoping some one can give me a hint of what to check or any kind of advice. reboot capture screen image

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• Cutting up videos (excerpting) on Mac OS X -- iMovie produces super-large files

  - by markvgti

  I need to cut out parts of a video (+ the associated audio, of course) to make a short clip. For example, take 2 minutes from one location, 3 minutes from another part of the video, 30 seconds from another location and join it all together to form one single clip. The format of the input video is mp4 (H.264 encoding, AFAICR). Don't need very sophisticated merges or transitions from one part to the next, or sophisticated banners (text) on-screen, but some ability to do so would be a plus point. I've done this with iMovie in the past, but where the original file was under 5MB/min of play time, the chopped-up version was over 11MB/min of play time, which to me seems really bad. Is there a better/different way of doing this on OS X? Looking for free (gratis) solutions. OS: OS X 10.9.3

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• X crashes and GNOME loses all its configuration

  - by Oli

  About every 3 days on my desktop (always on), X crashes, gdm restarts and it dumps me at a login screen. When I log in Gnome appears to have lost a lot of its settings: it plays sounds in weird places, UI elements look like they're from the 90s (GTK+ defaults) and it's generally pretty hideous. Note everything works fine. It's not like my profile doesn't exist because I can browse the internet fine (Firefox knows my bookmarks, history, passwords, etc) and my desktop is unscathed (apart from the icon theme). Manually restarting gdm doesn't fix this. I have to do a full reboot. Now I'm almost certain that this is a nvidia issue causing X to baulk (I've seen similarish threads on nvnews) and I'm happy with that (my fault for running their latest drivers all the time). What I'm concerned about is why Gnome looks so fugly. Is there anything I can do to force it to reload its settings without restarting the whole computer. Restarting is an issue for me as I run several daemons that other computers on the network depend upon. This is what I mean by ugly/fugly... Look at that scroll bar!

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• Windows 7 on 1st Gen MacbookPro Unibody (Q4-2008) - power problems.

  - by typemismatch

  I have the first generation macbook pro, purchased Q4 2008. I've been trying to run Windows 7 and can get it all installed great with the BootCamp 3.1 64 bit drivers however ... power management isn't great. The screen and keyboard don't automatically dim - the laptop gets too hot. I noticed on some newer macbook pros that windows 7 works perfectly and the above doesn't happen. Does anyone know if there really is a hardware issue with this 1st gen or is there some firmware update I can use to fix this? Thanks!

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• Computer crashes and freezes a lot

  - by Gigili

  My computer crashes like it freezes sometimes but sometimes it jumps to a black screen which I can do nothing about other than restart. I tested if it has anything to do with the programs I normally run or with the ones I installed, but it's a long time I have the problem and I think it also happened in the beginning that I bought this computer. To make sure, I normally run skype and Spiral Knights and some animation softwares like Flash. The specs are: Nvidia geforce gtx 560 evga Asus p8H67-m evo motherboard 16 gb ram Intel i7 What can I do about it? What issue is more probable to cause the problem?

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• Installing any linux distro on new netbook hangs midway

  - by Neigyl R. Noval

  I have just bought a new netbook, Lenovo S110 with a starter Window 7, 32 bit Operating system. I wanted to wipe away Windows and go with Debian or Ubuntu. I have successfully made my USB drive bootable with the Debian net install. The problem is, my computer always hangs up at the start of the installation (with the latter shown on screen). Keyboard stopped responding , and USB was probably not reading (since it was not blinking anymore). I know the bootable USB drive with Debian installer is working since installation works on other netbooks. What should I do to install Linux on my netbook?

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• Partition table damaged

  - by emaster70

  Hello, I'm currently in a terrible situation with my hdd: I was trying to install an OS side by side with my windows 7 x64 and I used the Paragon Partition Manager feature made for that. It disabled/hid/(damaged?) one of my partitions and now I can no longer access it. The partition, unfortunately, contains data I need to access urgently and I've got no backup. To complicate things even further I don't have another PC (I'm writing this msg from my iphone) and all I can rely on is a backtrac 4 disk (wkn't connect to my wifi, gets stuck obtaining IP address) and. Windows 7 x64 disk. Booting into windows fails with the pc hanging on the starting windows screen. Safe mode won't work either. Is there anything I can do? Here's the layout of the disk: Recovery partition Win partition Unallocated space (it's supposed to be my data partition) Other os partition (don't care about that, the installation of the other OS failed) Please help me, I'm desperate.

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• Workspace Issues on ubuntu 12.10

  - by JaySch

  I'm having the following problem with 12.10 Unity running on a Toshiba A505 16" display laptop using an external 24" Samsung LED monitor (resolution 1920 x 1080 (16:9). Also using the default 2 x 2 workspaces: After powering up the laptop, I Click the Workspace Switcher and the 4 images which represent Workspace 1, Workspace 2, Workspace 3, and Workspace 4 are visible but are in a very elongated, stretched out aspect ratio. Also, any desktop icons placed on the left side of the screen don't show up when I go to full view on any of the 4 workspaces. To resolve this issue, I open up the laptop lid until the video display switches from the external Samsung LED monitor to the internal laptop display, which renders the four workspaces perfectly. I then close the laptop lid and now the workspaces display the correct aspect view; both in the workspace switcher thumbnail view an in full view. I can now see the full desktop, including any desktop icons. Is there a way to configure my system so that Workspaces work properly when the laptop is connected to an external monitor without having to open and close my laptop? Thank you.

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• How to get Nvidia 555M working on Ubuntu 12.10 (drivers, optimus, cuda)?

  - by bluudz

  I'm trying for few days to get my GPU working properly on Alienware M14x with GPU NVidia 555M, but I have no luck at all. After fresh ubuntu install I did follow the guide here NVIDIA Optimus and Ubuntu 12.10 and istalled Bumblebee without problems. Tested glxspheres/optirun glxspheres both working fine. Now I was continuing to install CUDA as is said here How can I get nVidia CUDA or OpenCL working on a laptop with nVidia discrete card/Intel Integrated Graphics? but I'm getting: Driver: Not Selected Toolkit: Installation Failed. Using unsupported Compiler. Samples: Installation Failed. Missing required libraries. I did not select the driver as I though Bumblebee installed driver already. How should I proceed? And also at what point is the NVidia driver being installed and how can I try its working? Bumblebee seems to be installing the driver, CUDA wants to do the same, its all a bit confusing really. Sorry if its lame question, but I would really want to at least get graphic card and second screen working.. Thank you for any help.

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• How can I have sound output before logging in?

  - by ??O?????

  I have a machine (Ubuntu 11.10) that I would like to have it play audio (typically through an amplifier), but the machine should be headless (where its final placement will be). I will control what is played through ssh. However, there is no sound output until I login to the graphical console. At first I thought it was an issue with pulseaudio, so I promptly removed it to use the default ALSA, but I have the same issues. I ssh to the machine, I run alsamixer and get the typical cannot open mixer: No such file or directory error (while /proc/asound/cards display correctly what I have). If I login on the graphical console, alsamixer works fine in the ssh session, and I have sound output. I logout, and then alsamixer stops working. So something runs (Xsession perhaps?) when I login that enables sound output, and gets disabled when I logout. I remember in older versions of Ubuntu, there was a drum roll when the machine showed the login screen; that is not the case anymore. Perhaps if I somehow can enable that drum roll, I'll have fixed my problem too. In any case, the question I ask is what the title says.

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• Constantly visible notification and access icon for Empathy in Gnome 3

  - by aef

  Since a short while I'm using Ubuntu Oneiric Ocelot (11.10) with gnome-shell (Gnome 3) and I'm trying to get accustomed to the default Empathy Instant Messaging client. One mayor problem for me (coming from Gnome 2 and Psi) is that there is no constantly visible icon which makes it clear (for example by changing its icon or showing an animation) if there are incoming messages which I did not read already and which lets me jump into them with one click. Also I'm missing a way to bring up the contact list or hide it away with a click. I sometimes have real problems even figuring out how to even open the contact list up again. Is there a Gnome 3 extension or some other trick available to display such a notifier in the top bar? I'm talking about something just like the sound and network controls which are already located there. I know that there are notifications in the lower notification area (former system tray), but as it is only visible as I move the mouse in the lower right corner of the screen, its useless for me.

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• DIsable my nv video card driver in linux

  - by Dahaka Wang

  I'm trying to passthrough my nv video card to my domU, but I could not bind my video card to the pciback driver I only have one video card with the pci number 0000:03:00.0, so I used the following command echo -n "0000:03:00.0" > /sys/bus/pci/drivers/nouveau/bind to unbind the nouveau driver from my video card. The screen went black because I have forcefully removed the video driver, therefore I ssh'd into the computer to run further commands I ran: echo -n "0000:03:00.0" > /sys/bus/pci/drivers/pciback/bind to try to bind it to my pciback driver, but I got: bash: echo: write error: No such device I found out that this was the message shown when trying to bind a PCI device which is already bound. Therefore, I think that something was still using my video card Can anyone help me out? Thanks a lot!

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• Can I set Windows default second-monitor behaviour to "Extend these displays"?

  - by MT_Head

  I travel to multiple offices (and multiple desks in those offices), and whenever possible I plug an external monitor into my laptop. Whenever I plug in a monitor I haven't used before, Windows defaults to "Duplicate these displays" - which messes up the arrangement of icons on my desktop if the external monitor is a different shape from my laptop's monitor. I then select "Extend these displays", and my laptop screen returns to its original shape - but my icons don't go back to their original arrangement. Grrrrr. Fast-forward a few days or weeks; I've got my icons arranged so I can find stuff again - then I go to a new office and it starts all over again. I'm tired of this. Is it possible to make "Extend these displays" the default behavior? I'm using Windows 8 x64 Home Premium, but I had the same complaint under Windows 7 x64 Ultimate. (Prior to that, I hadn't discovered the joy of dual displays. Ah, the time I wasted...)

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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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• Crash when trying to detect touch

  - by iQue

  I've got a character in a 2D game using surfaceView that I want to be able to move using a button (eventually a joystick), but my game crashes as soon as I try to move my sprite. This is my onTouch-method for my steering button: public void handleActionDown(int eventX, int eventY) { if (eventX >= (x - bitmap.getWidth() / 2) && (eventX <= (x + bitmap.getWidth()/2))) { if (eventY >= (y - bitmap.getHeight() / 2) && (y <= (y + bitmap.getHeight() / 2))) { setTouched(true); } else { setTouched(false); } } else { setTouched(false); } And if I try to put this in my update-method: public void update() { x += (speed.getXv() * speed.getxDirection()); y += (speed.getYv() * speed.getyDirection()); } The sprite moves on its own just fine, but as soon as I add: public void update() { if(steering.isTouched()){ x += (speed.getXv() * speed.getxDirection()); y += (speed.getYv() * speed.getyDirection()); } the game crashes. Does anyone know why this is or how to fix it? I cannot figure it out. I'm using MotionEvent.ACTION_DOWN to check if the user if pressing the screen.

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• DVI problem with LG L204WT

  - by Holgerwa

  I have a LG L204WT which has VGA and DVI connectors. Until recently, I have used the monitor via VGA, but now I have upgraded the graphics board and switched to DVI. The problem is that each time after the computer starts, the monitor either doesn't show anything (black screen, but doesn't go into standby) or the picture is distorted. I then switch the monitor off and on several times, and at some point it starts correctly and then I can work as usual. This only happens on startup. It is one out of 3 monitors, the other two work fine. It seems to me as if the monitor is not able to synchronize on the DVI signal and either shows a distorted picture or nothing at all. There are no settings in the monitor setup that would change anything. What could be the problem?

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• What to do when you can not type a letter in Cygwin/bash

  - by Stenemo

  I had a very strange issue that happened as I was editing .bashrc or possible .profile, which made it impossible to press the letter "a" (it is not showing up on screen, although I am able to type it in all other programs as usual. I am not sure, but I was trying to get aliases to work on my computer at the time, so it is possible that I somehow aliased a to "", although I am not sure how that would have happened. I solved this by copying all the files in "cygwin\etc\skel\" (these are the backup starting files in case you ever need to replace them) into my home folder. Just leaving this question here so that other people which run into the same problem know what to do, not sure why I am unable to press "solve your question" at the moment, but I hope that someone who reads this knows how to edit this question so that the next person with this problem knows what to do. Also, not sure if this belongs in this forum or another one, but guess it is more of a unix question.

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• handle 50-100 million rectangle in AutoCAD

  - by Wang

  I have huge problem when I try to get large array. For example, I have something like 10000x10000 or 5000x5000 rectangles. It is almost impossible to do anything because the screen just got frozen up. It is impossible to contain so many objects in one array. So I had 100x100 rectangle array as xref then array the xref again. It ate up about 12GB RAM. I guess this is the problem. Can anyone give me any suggestions can achieve the same structure but without freezing the computer?

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• 2d game view camera zoom, rotation & offset using 'Filter' / 'Shader' processing?

  - by Arthur Wulf White

  I wish to add the ability to zoom-in, zoom-out, rotate and move the view in a top-down view over a collection of points and lines in a large 2d map. I split the map into a grid so I only need to render the points that are 'near' the camera. My question is, how do I render a point A(Xp,Yp) assuming the following details: Offset of the camera pov from the origin of the map is: Xc, Yc Meaning the camera center is positioned on top of that point. If there's a point in Xc, Yc it is positioned in the center of the screen. The rotation angle is: alpha The scale is: S Read my answer first. I am thinking there is more optimized solution, thanks. My question is how to include the following improvement: I read in the AS3 Bible book that: In regards to ShaderInput, You can use these methods to coerce Pixel Bender to crunch huge sets of data masquerading as images, without doing too much work on the ActionScript side to make them look like images. Meaning if I am performing the same linear function on a lot of items, I can do it all at once if I use Shaders correctly and save processing time. Does anyone know how that is accomplished? Here is a sample of what I mean: http://wonderfl.net/c/eFp0/

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• Package temperature above threshold, cpu clock throttled

  - by drN

  I am running 64 bit Ubuntu 11.10 on an i7 with 8gigs of ram. I thought of putting this on askubuntu.com but decided that maybe the question has a much broader appeal. I have the following error message popping up when I run math simulations. CPUn: Core temperature above threshold, cpu clock throttled (total events = xxxxxxx) CPUn: Package temperature above threshold, cpu clock throttled (total events = xxxxxxx) I realize that this is a hardware warning message (machine check exception, correct me if I am wrong). How do I turn these messages off? Since it doesn't seem to have a detrimental effect of my calculations or my computer (presumably), I don't like it cluttering up my virtual console screen with hundreds of these messages.

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• LiveCD not booting/can't install Ubuntu 11.04

  - by user20318

  So, i got a new laptop somedays ago and as usualy, i went formated it to install Ubuntu. Download 11.04 and burned it on my pendrive using my old laptop (running 11.04). When i tryed to boot from the LiveUSB on my new laptop, it just showed me some weird graphics and if i select any option (can't see what im selecting), it gives me a black screen and that is all. Then i tryed to boot with this LiveUSB on my old laptop, and it worked just fine ._. Burned a CD with Ubuntu 11.04 (64bits) and the problem continue. Then i tought it could be my CD Driver, since the laptop is new and all... burned a Windows 7 64 bits DVD and it worked just fine. Also, if i check the CD/Pendrive inside Windows Seven, all the files there are ok. Anyone have any idea of what can be? I found lots of questions about this, but none of them had the weird menus i'm getting ._. oohh... i also get a "prefix is not set" before the weird menu appears :S My sis specs: Intel Core i5 2400 Intel HD 3000 4gb DDR3 If anyone can help, i will be really greatfull ._.

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• Laptop won't load an OS or even an OS setup.

  - by Talasan Nicholson

  My fiancé's laptop started to crash and would get BSOD errors to the point that she couldn't even boot up because it would either take forever or just crash. So I figured I'd try to reformat, as it's done this before and this was the solution last time. On Windows 7, it will not go passed the "Setup is starting..." screen. On Windows XP, it crashes once the setup is about to start (BSOD). I shut it down and let it sit for 5+ hours, in case it was overheating, but it's doing the same thing anyway. By now, I figure it's something to do with the hardware but I hope not. Any ideas?

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