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• How to configure Linux to act as a Bluetooth RFCOMM SPP server?

  - by regulatre

  I'm writing a phone app for Android that connects to a bluetooth RFCOMM device in my car. My phone app talks AT commands with it. For development work, I often need to communicate with the device to try different commands and things. My neighbors are starting to think I'm weird because I sit in my car for hours on end with my laptop screen shining on my face, typing away like a script kiddie. I'd much rather configure one of my many Linux servers to act as a bluetooth RFCOMM device and allow me to connect to it (indoors, while I sit on my couch). I imagine I have to start with something like sdptool add SP But then what? I'm perfectly happy writing a perl app to handle the I/O, but I just don't know how to make the bluez stack accept connections and subsequently pipe that stream to a perl app.

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• Compute number of occurrences in a column of a spreadsheet

  - by wnstnsmth

  I have a Google Drive spreadsheet with a single column that holds string values (Twitter screen names) such as "user1", "user1", "UserX", and I would like to count those values so that I can easily craft a bar chart out of it. So the result should be value occurrence ----------------------- user1 2 UserX 1 ... .... Please note, I only want to look for whole words, and not part words. EG, the words 'on' and 'one' appears in the word 'money' - I would not count this (eg, only the word money is counted). Hope that is clear enough. What formula should I use?

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• Windows 7 - Wireless connection before login possible?

  - by EJ

  Is there a way for Windows 7 to connect to a wireless network before a user has logged in? I have found no good answers to this question elsewhere. Some say it should already be happening if I am using Windows' connection management (WLAN AutoConnect, formerly WirelessZero), but I am using that, and it is not. I can sit at the login screen for as long as you please and it will not connect (watching the router from a separate PC), moments after I login it will connect. Others have said that you need to use the manufacturer's connection management (not Windows'), and they can sometimes have the option for prelogin/prelogon connections, but I am using generic drivers. The device is a Netgear/Cisco WMP300N, with a Broadcom chipset. Netgear/Cisco and Broadcom all claim to not have drivers for Win7, but Win7 apparently comes with a functional driver.

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• Login takes very long, annoying repaints once a minute when logged in: How to troubleshoot?

  - by user946850

  I am suffering from a strange problem with my Gnome Shell in Ubuntu 12.10. The login takes very long ( 30 sec), with a blank screen. In Google Chrome and Thunderbird (and perhaps in other applications), the main window freezes and is repainted in periodic intervals of less than one minute. The freeze takes several seconds, and it seems that font and appearance of, e.g., tabs and buttons briefly changes. Attempting to enable the second monitor show an error message related to XRANDR. Everything seems to have started three days ago, after I had to force-shutdown the machine while it was hibernating due to low power. (It was hibernating for quite a while and didn't want to stop.) Silly me. I have tried the following measures, with no avail: Checked all package file md5 hashes using debsums Reinstalled all packages using a variant of dpkg --get-selection \* | xargs apt-get install -reinstall Temporarily moved configuration directories such as .gconf, .config and .gnome2 to another location Created a new user account When I choose "Ubuntu" during login, the problems disappear. I am sort of frustrated that reinstalling all packages didn't fix the issue. How to troubleshoot this Gnome Shell (?) problem, short of reinstalling the system? (Or did anyone see this kind of behavior on their machine?)

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• How much power supply do I need for my server, and could a shortage be causing my odd crashing?

  - by dolan

  I have 5 servers, all with similar hardware (i7, four 2tb 7200rpm drives, two 4tb 5400rpm drives, 430 watt power supply), and lately the machines have been freezing up. This has gotten worse in the last day or so, and I can't pinpoint any explanation. One recent change was adding the two 4tb hard drives. The crashes happen most often while running a large Hadoop job, so I was originally thinking the load was causing some issues, but last night one server just froze without any heavy load on the box (or so I think), other than HDFS (Hadoop's distributed file system) was probably rebalancing itself since two of the five nodes were offline. If I plugin a monitor and keyboard to one of these frozen machines, I can't get any response or feedback on the screen. Any ideas on possible points of failure and/or different logs I can look at to investigate? Thanks Edit: The systems are running Ubuntu 10.04 Edit 2: More on hardware: intel core i7-930 bloomfield 2.8ghz processor (quad core) 12gb (6 x 2gb) kingston ddr3 1333 ram antec earthwatts green 430 power supply msi x58m lga 1366 motherboard

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• Windows 8 gives "system thread exception not handled" after update

  - by Shobhit

  I have a 64-bit dell laptop which I recently upgraded from Windows 7 to Windows 8. Since then, it's creating a havoc in my life. The metro apps are not working; the system crashes once in a while and none of my games are running because I don't have the correct drivers for my graphics card (ATI 5000 series). Some days back, Windows downloaded an update and prompted me to restart. After that day, whenever I log in and fire up my desktop, I get all kinds of blue screen errors. The most common one looks something like this: - SYSTEM_THREAD_EXCEPTION_NOT_HANDLED. Please help me with how I can fix this, optionally how to go back to windows 7. Thanks.

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• How can I use the proxy settings on Epic privacy browser to log on to Facebook?

  - by EddieN120

  I love the Epic privacy browser because it is built from the ground up to enhance privacy. It's built on Chromium but because it has stripped out all code that tracks users across the Internet, pages load faster and things work snappier. With one click you can enable a proxy to hide your IP address, sort of like Chrome's "Incognito" mode on steroids. But there's a problem: if I load Epic, go to facebook.com, log in, and then click the proxy button, I can use Facebook for a while. But eventually, Facebook would throw up an error screen, saying that it thinks that my account has been hacked, and then it would make me verify my identity, force me to change my password, etc. I've had to change my password four times in as many days, which is very annoying. Now I turn on the proxy for browsing on to every other site but Facebook. Question: how can I use the proxy settings on Epic privacy browser to successfully log onto and use Facebook?

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• Testing a codebase with sequential cohesion

  - by iveqy

  I've this really simple program written in C with ncurses that's basically a front-end to sqlite3. I would like to implement TDD to continue the development and have found a nice C unit framework for this. However I'm totally stuck on how to implement it. Take this case for example: A user types a letter 'l' that is captured by ncurses getch(), and then an sqlite3 query is run that for every row calls a callback function. This callback function prints stuff to the screen via ncurses. So the obvious way to fully test this is to simulate a keyboard and a terminal and make sure that the output is the expected. However this sounds too complicated. I was thinking about adding an abstraction layer between the database and the UI so that the callback function will populate a list of entries and that list will later be printed. In that case I would be able to check if that list contains the expected values. However, why would I struggle with a data structure and lists in my program when sqlite3 already does this? For example, if the user wants to see the list sorted in some other way, it would be expensive to throw away the list and repopulate it. I would need to sort the list, but why should I implement sorting when sqlite3 already has that? Using my orginal design I could just do an other query sorted differently. Previously I've only done TDD with command line applications, and there it's really easy to just compare the output with what I'm expected. An other way would be to add CLI interface to the program and wrap a test program around the CLI to test everything. (The way git.git does with it's test-framework). So the question is, how to add testing to a tightly integrated database/UI.

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• Separate brightness/power-saving settings for multiple monitors

  - by MariusMatutiae

  At home, I connect my laptop to an external monitor. Under Linux X server, it works perfectly. Occasionally I watch a movie on the external monitor. When I do, I would like to fold the laptop shut, and just relax. This however triggers my settings for dimming the screen after 10 minutes of inactivity, which in turn extends to the external monitor. I know I could solve the problem by setting dimming to "Never", but this is a waste, causes the laptop to overheat, and is bad for the normal laptop use. How can I set the power saving/brightness specs for the external monitor, independently of the onboard one? I run Debian or Arch, under KDE.

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• Thunderbird: possible to change selected email highlight color (when no focus) ?

  - by Rabarberski

  Is it possible to change, in the message list of Thunderbird 3.0, the highlight color of the selected message when the list does not have the focus? The highlight color for the selected row is blue when the list has the focus, this is very clear. But when the list does not have the focus (e.g. after when you click in the message preview area), the highlight color is dark grey. However, this dark grey doesn't really stand out against the alternating row highlighting in the list (at least not on my laptop's LCD screen), making it difficult for me to quickly locate the message I've selected. So, any way to change this dark grey highlighting?

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• No monitor output after fresh install of 11.10 64-bit

  - by James

  I have a machine with a Nvidia 8600GT graphics card and a CRT monitor. Previously, I have only used Windows on it, and the graphics card seems to be working correctly in Windows 7. I booted up and installed Ubuntu 11.10 amd64 from the LiveCD and the whole process worked perfectly. When I tried to boot off the hard disk for the first time, the output to the monitor switched off during the splash screen, and this happens consistently. I can ctrl-alt-f2, so I tried an apt-get upgrade, which didn't help; nor did apt-get install nvidia-current. There is nothing that looks relevant in dmesg. Booting with the nomodeset option has no effect. Following the answers in this similar thread, I tried apt-get purge nvidia-173. Both startx and service lightdm start just say the service is already running. Does anyone know how to find out what the problem is? I was wondering if it is just that Ubuntu is trying to use a resolution that the monitor doesn't support, but I can't find out how to change that from the command line.

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• windows 7 randomly shuts down. where do I find related log? so that i can identify the error

  - by kirill_igum

  during the normal use, windows 7 shuts down. sometimes it happened when I start google chrome and few times during system update. after it shuts down, I turn it back on and I get to the screen, where windows asks me if I'd like a safe or normal start. the shutdown happens regardless if i'm on a battery or cord is there a log that can tell me where the error is? it can help me to further identify the solution. my setup: I run windows 7 on thinkpad x201 tablet. i have upgraded hard drive that worked fine for the last 6 months. the system is dual boot with ubuntu. I have installed some software recently, may be that can be the problem but sophos anti-virus cannot find anything. updates are all up to date.

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• How to change the terminal to SCO compliant in Ubuntu

  - by kaushik

  I have a server in which SCO 5.x is installed. I have several thin clients which were supplied from our head office. Those thin clients have linux pre-installed in them. When we tried to connect to our SCO server, we have found out that the thin client does not support SCO terminal type. So the program (Which is written in Oracle forms) is not working correctly. Lots of function keys stopped working and screen also not getting refreshed correctly. Hence we decided to use Ubuntu Live USB keys in thin clients. Now the problem is how can we change the terminal type to SCO in ubuntu ? Means I want it in the text terminal (Alt+Ctrl+F1,F2...) (Not in xterm...graphical terminal emulators). Does ubuntu support SCO terminal type ?

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• No longer able to run photo software on XP

  - by Peter

  I have Olympus Master 2 and Photoimpression 6 on my system which is running with XP Pro. Both programmes ran fine till recently and neither now works. I have run Avira and AVG anti virus (only one loaded at a time), Superantispyware, Spybot and Malwarebytes and removed the usual dross but no help. I have also uninstalled and reinstalled both several times but again no help. Both programmes load but the Olympus one immediately passes to the usual 'its met a problem and needs to close'...Photoimpression loads fully but as soon as I go to the edit screen it gives the same message. I have tried another profile to no avail. Any idea why this is and what the solution is??

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• DSL to web connectivity is often lost

  - by broiyan

  I am experiencing a frequent web connectivity problem via a DSL modem. The problem usually shows up as a reload later screen inside of Google Chrome, as illustrated. My DSL service was fine for the first 2 months, but in the most recent month this problem has been occurring. I have this problem several times a day. A few weeks ago, I used to power cycle (off then on) the DSL modem but this usually did not solve the problem. However, in recent days, the power cycle does seem to fix the problem. When the problem occurs, the modem lights do not look unusual. All the lights are green or flashing green. This problem happens regardless of whether I am using ethernet or WiFi for the last few meters between the DSL modem and the computer. What is the likely cause? How can I help the phone company solve this? Their staff are not very effective at troubleshooting this.

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• Changing size of window when testing Adobe AIR mobile applications

  - by Peter

  Im making a mobile phone Android application in Flash CS 5.5. I set the width/height of the stage to 480/800 px. When I hit CTRL+ENTER to test run the application I get a window that is 480/800 px. It cannot be resized. I want to change the size of that window WITHOUT changing the stage width/height. For example if I run the APK on a mobile phone with a 1000x1000 display the flash will scale automatically to fit the 480/800 stage to the 1000x1000 screen. So it should be possible to change the window size to 1000x1000 without having to change the stage width/height. But how?

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• Xterm is not completely erasing field lines

  - by user26367

  We have a SSH tunnel to a remote unix box from Windows clients using Cygwin. It launches a terminal program from the unix box locally on the Windows box for data input. The xterm window is launched as follows xterm -fn 10x20 -bg DodgerBlue4 -fg white -cr white -ls -geometry 90x30 -e program When a screen goes from read only mode to edit mode, the edit fields have ____. When going back to read only mode, a single pixel artifact is left behind for each field. *readonly* User: *edit* User: ___________ *after edit exit* User: . <- this dot is left behind Any idea what we need to change to fix this?

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• Home movie video browser

  - by Jim Hunziker

  I have a bunch of home movies that don't have useful filenames because they came straight off the camera. (I'm using Vista 64, by the way.) Picasa is pretty good for browsing through them and watching them, but it doesn't use my video card for rendering the videos. My CPU gets pegged at max usage, and full screen barely works. Windows Media Player or Quicktime works fine. Is there another application (like Picasa) that can be used for browsing through movies that both uses my video card and shows thumbnails of all the movies in my collection? I'd rather have something nicer than Windows Explorer. (The movies are h.264 AAC 1280x720.)

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• What is the pixel clock setting on my monitor actually doing?

  - by codecowboy

  I am experiencing display interference on a dell 24" flat panel monitor.I find that if I adjust the pixel clock settings up or down in the monitor's on-screen menus, the interference goes away for a while. The monitor is attached to a Macbook Pro using a mini display to VGA adapter. I have found that in a different house, I get the interference problem less so it might be related to electricity supply or possibly even ethernet powerline (total guess). What does the pixel clock setting actually do and does this behaviour point to a likely cause of the interference?

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• Can I do an overwrite install of Windows 7 without losing all my apps and data?

  - by Brian Dougan

  My local computer technician installed his store's copy of Window's 7 Premium on my computer. I had been using Window's Vista; but needed the XP component of "7" As part of the price I paid; I have a fully licensed, unopened "7" disc; with all of the drivers included. The technician warned me about the "nag" screen; that asks me to install my licensed copy at any time. Without thinking; I downloaded all of my usual software programs before installing the licensed copy. Here is my question: I hope this won't sound obvious: Will it overwrite my downloads?

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• Grub problem - Command prompt

  - by RhZ

  Update: Thanks to all who helped. I gave up and am going to re-install. Not the end of the world, no files will be lost :-) This time will be backing up grub haha. Thanks again, I really appreciate the community's help on this. I was going along fine when the new pae kernel came down, and it had some bug where the sound was all messed up. So I used startup manager to choose the older pae kernel and rebooted. But startupmanager must have fuXXored my grub. When I re-booted, I get thrown directly into memtest and thats it. I tried to re-install grub using the live disc method that I found in many places. That changed something so I get a prompt and the message: "GNU grub version 1.99 ubuntu. Minimal BASH-like editing is supported. Type help for complete list." But then I tried the live CD fix again and now am back at the memtest... What can I do to get my system running again? UPDATE: Just to be clear,when I start up I get a blinking cursor in the top left, and the word 'ON' in the middle of the screen. Then, after a good minute or two, the memtest starts.

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• Ubuntu 12.04 won't shut down - stopping winbind daemon

  - by jan

  My Precise Pangolin sometimes won't shut down - the screen is black with text on it. Mostly last line says something like "stopping winbind deamon" (sometimes also virtualbox, which is above winbind daemon; edit: sometimes the last line says "running unattended updates") and it stays like this for about ten miutes. Then I usually hold the power button for 5s to shut it down. It's very unpredictable - sometimes the computer shuts down without problem and sometimes it hangs. I've tried many ways to shut it down: HW button, panel applet, sudo shutdown -h now, sudo poweroff, sudo halt, etc. even sudo reboot or restart from panel applet have this problem. Sometimes it works ok but every method named hung at least once on the same (damned) line. My specs: FUJITSU SIEMENS LIFEBOOK E8310, Intel Core2 Duo T7300 @ 2.00GHz, 3GB RAM, GPU: Mobile Intel(R) 965 Express Chipset Family Ubuntu 12.04.2 32bit, 3.5.0-41-generic kernel (but it did it on older kernels and 12.04.x systems too). Any ideas what should I try next? Thanks a lot! Jan

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• How can I fix my xvinfo?

  - by YumYumYum

  How can i fix my X server/driver? $ xvinfo X-Video Extension version 2.2 screen #0 no adaptors present Additional info: $ uname -a Linux desktop 2.6.32-33-generic #70-Ubuntu SMP Thu Jul 7 21:13:52 UTC 2011 x86_64 GNU/Linux $ lspci 00:00.0 Host bridge: Intel Corporation Device 0100 (rev 09) 00:02.0 VGA compatible controller: Intel Corporation Sandy Bridge Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation Cougar Point HECI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation Device 1503 (rev 05) 00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation Cougar Point High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 1 (rev b5) 00:1c.1 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 2 (rev b5) 00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 4 (rev b5) 00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation Device 1c4a (rev 05) 00:1f.2 SATA controller: Intel Corporation Cougar Point 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 05) 01:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892 (rev 10) 04:00.0 USB Controller: NEC Corporation Device 0194 (rev 04) Follow up: It seems in 64-bit its a mess doing existing approach. Therefore, after upgrading to 12.04 64-bit this problems in same hardware is resolved (of-course, i have now other drivers problem)

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• My MacBook Pro (2011) is dead

  - by Dave

  I connected my Sony digital camera with the MacBook and the screen turned black. I wonder why because the Sony camera was not on at the time and technically could not be accessed. So I thought it might be temporary and I turned on my camera. Well, it did not work, but my MacBook Pro has been dead since then. It will not turn on - when I hold the power button for five seconds, nothing happens. When I connect the charger cable, the green light is very dim and blinks a little (with about 20% illumination). I wonder what the problem is. I have to call Apple Care, but just so that I know, what could be wrong? Is my MacBook permanently dead? It might be under warranty but I am not sure.

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• OpenGL ES multiple objects not being rendered

  - by ladiesMan217

  I am doing the following to render multiple balls move around the screen but only 1 ball is seen to appear and function. I don't know why the rest (count-1) balls are not being drawn public void onDrawFrame(GL10 gl) { // TODO Auto-generated method stub gl.glDisable(GL10.GL_DITHER); gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT); gl.glMatrixMode(GL10.GL_MODELVIEW); gl.glClientActiveTexture(DRAWING_CACHE_QUALITY_HIGH); gl.glLoadIdentity(); for(int i=0;i<mParticleSystem.getParticleCount();i++){ gl.glPushMatrix(); gl.glTranslatef(mParticleSystem.getPosX(i), mParticleSystem.getPosY(i), -3.0f); gl.glScalef(0.3f, 0.3f, 0.3f); gl.glColor4f(r.nextFloat(), r.nextFloat(), r.nextFloat(), 1); gl.glEnable(GL10.GL_TEXTURE_2D); mParticleSystem.getBall(i).draw(gl); gl.glPopMatrix(); } } Here is my void draw(GL10 gl) method public void draw(GL10 gl){ gl.glEnable(GL10.GL_CULL_FACE); gl.glEnable(GL10.GL_SMOOTH); gl.glEnable(GL10.GL_DEPTH_TEST); // gl.glTranslatef(0.2f, 0.2f, -3.0f); // gl.glScalef(size, size, 1.0f); gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertBuff); gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); gl.glDrawArrays(GL10.GL_TRIANGLE_FAN, 0, points/2); gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); }

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