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2
votes
2answers
55 views

After upgrade to 16.04, wifi signal strength jumps from perfect to zero and back

I upgraded from 14.04 LTS to 16.04 LTS on HP Z230. Internet connection worked perfectly under 14.04 LTS. There were no hardware changes. The computer connects to the router by a wireless usb device (...
0
votes
0answers
44 views

Ubuntu wifi antenna checking

I'm using Ubuntu 14.04 LTS on a Dell laptop of model Latitude-E5520 with a wifi card Intel® Centrino® Advanced-N 6205 I've recently changed the wifi card slot and in result had to change the wifi ...
0
votes
1answer
143 views

xvfb-run hangs on trap/wait in Elastic Bamboo's Ubuntu 15.04 AMI on AWS

I'm trying to run some headless robot/Selenium tests via Elastic Bamboo using Xvfb, on Ubuntu 15.04 in AWS EC2. It works if I run Xvfb manually and then run the test... export display=:99 Xvfb :99 -...
0
votes
0answers
14 views

Upstart restart sends multiple SIGHUPs

I'm trying to restart a process that is a little picky with how it handles signals (namely, one SIGHUP triggers shutdown, but if it receives a second while shutting down, it attempts to come back up ...
0
votes
2answers
203 views

Ubuntu 14.04 wireless unstable and the signal is weak

I installed Ubuntu 14.04 LTS alongside Win8.1 and the wireless was unstable. I updated windows network drivers then it went better but the signal is still very weak and also sometimes network switches ...
1
vote
2answers
189 views

Wifi apparently connected, but webpages won't load

I'm running the latest Ubuntu 14.04.3, and my issue today is that my Wifi connection sometimes becomes really slow, and eventually disconnects. I tried googling around to see if I can get any good ...
0
votes
0answers
454 views

Why start-stop-demon doesn't signal property that daemon has started/stopped

Here's a part of the daemon script for BtSync at /etc/init.d/btsync: do_start() { start-stop-daemon --start --verbose --oknodo --background --user $CHUID --user $CHUID --pidfile $PIDFILE --exec $...
0
votes
2answers
183 views

Difference between C programs and shell scripts receiving signals from fuser

I have written the shell script below for a lab in my college. It must look at a log file being upgraded frequently from another process and create a number of copies passed at invokation. Here is the ...
0
votes
1answer
113 views

index out of range? [closed]

# load parameters file yml = yaml.load(open(sys.argv[1])) # imports for pkg, functions in yml['imports'].iteritems(): stri = 'from ' + pkg + ' import ' + ','.join(functions) exec(stri) ...
0
votes
1answer
588 views

wifi weak signal tplink tp-wn725n (ubuntu 14.04)

I have problem, low wifi signal. I checked the router and signal is very often going to 20 %. I did't find any special reason for that. I use an USB wifi card: TP Link TP-WN725N v2. I've already ...
0
votes
2answers
2k views

Send SIGCONT signal to another user process

I saw a document (http://www.gnu.org/software/libc/manual/html_node/Permission-for-kill.html) which say, "The SIGCONT signal is a special case. It can be sent if the sender is part of the same session ...
1
vote
0answers
188 views

Why does sudo prevent catching SIGTSTP (Ctrl+Z)?

This program is written to catch SIGTSTP (Ctrl+Z) and bypass its normal effect, printing a message and returning to its normal operation instead of allowing its process to be suspended: #include<...
1
vote
0answers
57 views

The UBUNTU Graphics Catch 22

Trying to use a Live DVD to run Ubuntu 14.04.1, I get the "Monitor signal out of range" error. I hit ctrl-alt-F1 to bring up the command line. I do sudo nano /etc/default/grub and remove # from ...
-1
votes
2answers
1k views

12.04 wifi signal very weak

Ii am new people in Ubuntu I am using 12.04 version , but my wifi signal very weak My router beside me only , my signal also only 50% ... Anybody know how to fix it?i have try to research solution, ...
1
vote
1answer
863 views

emit signal with custom type objects array parameter from c++ and receive in qml

I would like to emit a signal from a Qt C++ class which includes a parameter that is an array of custom objects (inherited from QObject) and receive the parameter in its qml slot, but i'm afraid it is ...
0
votes
1answer
43 views

sigfillset is not setting signal bits

I am having this strange problem! My code is very simple. #include<stdio.h> #include<unistd.h> #include<signal.h> #include<stdlib.h> main(...
0
votes
1answer
411 views

What do these Terminal Signals mean?

When I start to use a command to terminate an ongoing process, I can include a signal. What is the difference between the signal 9 and the signal 15?
0
votes
1answer
230 views

Ubuntu 13.10, not recognizing 2nd monitor

Just installed ubuntu for the first time and my monitor isn't showing up on the display settings. I am on a laptop with nivdia graphics if that helps. I believe I have bumblebee installed. Other ...
2
votes
0answers
261 views

Core only dumped upon receiving SIGQUIT

Learning about signals, I found out that calling the <stdlib.h> functionabort(void); in a C program, which roughly equals to raising a SIGABRT signal, doesn't create a core file on my Ubuntu 13....
2
votes
0answers
854 views

Unix Signal handling in Qt Embedded Linux [closed]

I have an application for the USB interface in Qt (Embedded Linux). When a pen-drive is inserted, the kernel sends a signal for that and I want to recognize that signal and I want my Qt application ...
0
votes
1answer
576 views

TP Link TL-WN7200ND Signal Strength

I have external Wireless Adapter TP Link TL-WN7200ND I'm currently using it on Windows its giving me 4/5 signal bars When I used same Adapter in Ubuntu 13.04 it gives 2/4 bars. I'm using Live USB for ...
1
vote
0answers
202 views

no internet connection, but have signal in wifi

I cannot access yahoo.com, google etc in my browser, but I have signal in my WiFi, how can I access the internet again? Please can you tell me how to configure and solve my problem, Thanks
2
votes
1answer
2k views

Bad WiFi reception on Asus Zenbook (Works great with Windows 7)

My WiFi reception on my Asus Zenbook (model ux31) is very weak compared to when I boot my Windows 7. I use both from the same location, and the reception on other devices (ex: my iPhone) is great. I'm ...
3
votes
2answers
593 views

How can I tell how long for Watchdog to wait to stop all processes?

I have a server which is monitored by Watchdog, and experiences reboots occasionally due to faulty network hardware I am unable to replace at the moment. As I read, Watchdog sends a SIGTERM to all ...
1
vote
1answer
366 views

Keep VGA signal sending when using VGA switchbox

I am trying to mimic the VGA projector setup I had on Arch Linux. I have three laptops connected through a VGA switchbox to an external projector. When I was using ArchLinux I used xrandr to start ...
1
vote
1answer
951 views

Weak wifi signal on Lenovo g series

I've just installed Ubuntu 12.10 on my Lenovo laptop and the wifi signal reception changed completely. I had Windows installed on it first and it had no problem connecting to my home network from my ...
1
vote
1answer
413 views

Weak Wireless Signal - Atheros ar5008x drops connection

I'm dualbooting Ubuntu 12.04 with Windows Vista and while Vista handles the signal perfectly (4 or 5 bars out of 5 and never drops) Ubuntu shows 1 or 2 bars and drops the signal constantly if the ...
2
votes
1answer
78 views

How do I make a app in Quickly and play a sound when a button is clicked in the app?

Is there anyway I can make an application in which a button made in Glade can be clicked to play a custom re-definable sound?
0
votes
1answer
954 views

Weak signal even if I'm only 5 meters away from my modem

I'm having kind of a weak signal on Ubuntu, about 2 bars (I have a laptop), when i go on windows it really gets quicker (5 bars). What may cause this? My wifi worked as soon as I installed Ubuntu so i ...
1
vote
2answers
9k views

Input signal out of range; Change settings to 1600 x 900

I recently installed Ubuntu 12.04 onto my HP Pavilion, in an attempt to make the desktop able to dual-boot Windows 7 and Ubuntu. I managed to get down to the last step, and finished the installation ...
1
vote
1answer
498 views

HDMI initially worked, no more and screen issues when try

Connected my System76 Lemur Ultra (Intel i5 3210M + Intel HD 4000) to my television. It showed up fine. After about 15 seconds, it abruptly disconnected for some reason with a "no signal" error on the ...
3
votes
2answers
1k views

The report belongs to a package that is not installed

I have gotten the error message "The report belongs to a package that is not installed." Generally I would just ignore that since seemingly there is no problem except I got a crash report and then I ...
0
votes
1answer
44 views

PyGtk: Scrolllist with Entry, can I set an Id

I have a scroll list on my window that I am going to insert 2 entry for each row, I am trying to understand how I can catch the entry that has been changed and update my array with this value. I will ...
3
votes
1answer
609 views

Ctrl-Z equivalent for GUI Programs?

I often have to run the update manager on a slow connection, and while reading my emails, I meanwhile would like to surf for 2 minutes in the web, then have the full bandwidth again for the update ...
1
vote
2answers
4k views

Wifi signal weak while on an HP Pavilion G6

I have just installed Ubuntu 12.04 LTS along with the standard Windows 7 on my new HP pavillion g6 (AMD). They both work fine but when I am running Ubuntu, the wifi signal strength shows low (...
0
votes
1answer
509 views

How can a Qt application be notified that the user's session is ending and provide it with opportunity to save its state before being terminated?

I am writing a Qt application and have run into the following problem: when the user logs out or attempts to shut down the machine, the application is instantly terminated without providing it any ...