Raspberry Pi Forums

roycejp

It seems you can control individual devices connected to the USB ports. The hub-ctrl.c github page at https://github.com/codazoda/hub-ctrl.c says: You can also specify the USB device based on the BUS and DEV numbers. Use the following command the list the currently connected devices. It's useful to ...

roycejp

Hi, I have another issue now. I'm trying to display a .jpg image on the screen. https://goo.gl/photos/84cioWj8hJv4uYAUA Rightclick->Properties confirms that its a JPEG image. But when I run my program, I get: royce@anshulPi:~/openvg/kbd-touch$ ./kbd-touch Not a JPEG file: starts with 0x89 0x50 royce...

roycejp

Yes, Paeryn's suggestion worked, Thanks again. What is the ' chars.c ' file in the openvg/client folder? Is it one of the demos? If we build and try to run it, it seems to have a bug : royce@anshulPi:~/openvg/client$ ./chars Segmentation fault (core dumped) royce@anshulPi:~/openvg/client$ Also It se...

roycejp

ajstarks wrote:odd. I just re-tested, and it worked fine.

Hi,

Please try it with Ubuntu Mate 15.10 / gcc 5.2

Thank you.

roycejp

thanks, fixed. Hi, its not totally fixed. I get these errors (gcc 5.2.1): royce@anshulPi:~$ git clone git://github.com/ajstarks/openvg Cloning into 'openvg'... remote: Counting objects: 1000, done. remote: Total 1000 (delta 0), reused 0 (delta 0), pack-reused 1000 Receiving objects: 100% (1000/1000...

roycejp

Yes, that was it. Many Thanks! Probably for the same reason, I also could not build the official demo programs as described here. I kept getting similar errors: https://www.raspberrypi.org/learning/demo-programs/worksheet/ I suppose this will be updated soon, in keeping with the updated C standard. ...

roycejp

Hi, Thanks for the helpful reply, now the library compiled without errors or warnings. But when I tried to build the demo programs in the openvg/client/ folder, there were a bunch of errors. I modified the Makefile there too with the -std=gnu89 directive, but the errors remained : royce@anshulPi:~$ ...

roycejp

Hi, I had ajstarks' openvg library successfully working in Raspbian (Jessie). Later I wanted to try out Ubuntu-MATE, so I installed that on a fresh SDcard. I followed the same procedure to install the openvg library and got a bunch of errors & warnings : royce@anshulPi:~$ git clone git://github.com/...

roycejp

The changes to the configuration file seem to have helped.

Deluge is running today for nearly 6 hrs without a crash.

roycejp

Jakob,
Did you log to console (-d) ?

I got the segmentation fault message on the console only.

It was not there in my log file!

roycejp

I also found this blog, which deals with the exact same symptoms.
http://blog.backslasher.net/raspberry-p ... fault.html

I've made the configuration changes as suggested therein, so I'll report after a while if it worked ...

roycejp

Hi, As advised, I started deluged with logging to console as well as file (see below) . After a while, as expected, deluged crashed with a segmentation fault. ~ $ deluged -d -L critical -l ~/dlgLog.txt Segmentation fault Also, the log file has the lone following line: [ERROR ] 14:01:33 authmanager:1...

roycejp

It has become impossible to download anything. The deluge daemon keeps stopping every few minutes. I don't want to return to my windows PC and uTorrent (which worked for years flawlessly). I'm not a Linux person, but I wanted to give Raspberry Pi/Deluge combo a shot. So far it has been utterly frust...

roycejp

RaTTuS wrote:depends if it crashes or hangs or whatever
does it report errors in the logs ?

Thank you.

Where can one find the said logs?

roycejp

I'm facing exactly the same issue. I've installed Deluge since a few days, and this issue keeps cropping up. The Deluge daemon just stops randomly... sometimes after a few hours, sometimes after a few minutes. I have to be constantly checking via the web UI, and manually start the daemon each time I...

roycejp

I managed to track down the bug. I was calling a shell command inside one thread using a file pointer which was also being used by the main thread. I just created separate file pointer for the thread, and the problem went away. Many thanks for your help ! I'll post further updates here :-) I plan to...

roycejp

Things are not going all that well ... I'm getting this error (where 'webradio' is the name of my executable) : *** glibc detected *** ./webradio: double free or corruption (top): 0x00662228 *** and it aborts. I'm using 2 threads besides main(), and 2 mutexes in the application. What does this mean ...

roycejp

Thank You.

So to increase the number of shared variables I edit this line:

Code: Select all

static pthread_mutex_t piMutexes [4] ;

and change the '4' to any value I want ?

BTW,

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man pthread_mutex_lock

gives me:

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No manual entry for pthread_mutex_lock

roycejp

Hello, I have made a C program under gcc using wiringPi, which is working well. I want tp try multi threading to improve performance of certain part of my code. I'm not clear about the piLock / piUnLock functions. To quote from the wiringPi reference page, piLock (int keyNum) ; piUnlock (int keyNum)...

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Re: openvg library on Ubuntu-MATE

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WiringPi: question about multiThread program