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27 views

PCI IRQ RT_PREEPMT Issue

I have a PCI PMC card installed on my Ubuntu 12.04.5 LTS 64-bit system. I recently moved from a version without the RT-PREEMPT extension to that with the extension. Since moving from the old system ...
0
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0answers
8 views

How to disable usage of data cache for a particular program?

I develop application for wrl, the application runs in an embedded node. I like to know the option to disable the usage of data cache for the particular program alone
0
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0answers
29 views

problem in runing Real Time Application Interface

I have ubuntu 14.04 , and i'am instaling the Real Time Application Interface , if a run the rtai , the terminal print : * * * Type ^C to stop this application. * * insmod: ERROR: could not insert ...
0
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1answer
26 views

Question about the RTAI and version Of kernel

I have a ubuntu 3.8.0-29 geniric and the gcc 4.6.3 . I will to install the RTAI , what is the version of kernel and the version of kernel to download ?
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0answers
29 views

How to compile the patch of Real Time Application Interface in ubuntu

I will to install the RTAI for Ubuntu 14.04, I followed this tutorial : https://github.com/shengtu/Tesla . But when you do sudo patch -p1 < /usr/src/rtai/base/arch/x86/patches/hal-linux-3.16-x86-...
0
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1answer
103 views

How install Real Time Application Interface (RTAI) in ubuntu 14.04

I have Ubuntu 14.04 and I want to install rtai , my version kernel is : 3.16.0-30-generic. How to install the Real Time Application Interface Rtai of kernel 3.16.0-30-generic?
0
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0answers
12 views

How do I set grub2 to load a different Xorg driver for a certain kernel build?

I need to use the lowlatency kernel from time to time, but that kernel build doesn't work with the nonfree Nvidia drivers for my GPU. So, I need to tell Xorg to load the free noveau driver when I'm ...
0
votes
1answer
71 views

Problems compiling a kernel (3.4.110) on xubuntu 15.10

I am not sure if i am in the right forum for this, because it's more of a debian/kernel thing, but it is worth a try. I have to set up a linux system to work with EtherCAT ( for a machine control ). ...
1
vote
1answer
110 views

Hard disk's too slow to play a huge raw AVI file

I have a huge AVI file. The video player (VLC) stops every about 10 seconds because the HDD doesn't read fast enough. (details here) I want to be able to play this video. Anyone knows a workaround? ...
0
votes
1answer
90 views

VLC can't play large raw avi 1080p video

I recorded a huge raw avi video using SimpleScreenRecorder but it can't be played smoothly. Every about 10 seconds the video stops to render. How can I avoid this. I don't think my computer can't ...
3
votes
1answer
450 views

How to get to a perfect jackd configuration that works trouble-free and out of the box?

While working on a PPA to provide binaries for Sonic Pi, the users of the PPA binaries keep stumbling over jackd. How to make things easier for them? Sonic Pi is an educational music tool that ...
0
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0answers
13 views

How to install real time patch (14.04) [duplicate]

How can I install the real time patch for ubuntu 14.04 ? I can't find a tutorial about that.
1
vote
1answer
58 views

How to get debuginfo package for -rt kernel

I have Ubuntu 14.04 with 3.14.3-rt4 kernel. I have to use SystemTaptool and I must have debug symbols to use it. I follow the instruction in here but there are no debug symbols for my kernel and when ...
0
votes
1answer
884 views

What is clamd's function?

I understand that there is currently no real-time AV for Linux, or at least not using ClamAV. So what is clamd's function then? Because that talks about on-access scanning, so what is that if not real-...
0
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0answers
193 views

how to install DSP or LV2 effects(realtime effects) while playing music and videos in ubuntu 14.04 LTS?

I want install effect realtime processor sound while playing music and videos, which are similar to windows applicatios such as SRS Audio Sandbox or Viper4Windows... I tried Creox but is very outdated ...
1
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0answers
32 views

Control Alsa in real time with external controller?

Okay so after hunting down old threads and questions, I feel it's best to just ask this and see if I can get some help. My question is how in the world do I control Alsa externally with my Korg micro ...
0
votes
1answer
19 views

Mixed criticality system based on Ubuntu

Is there a way to implement a mixed criticality system based on Ubuntu? I.e. if we have some software module that is complex and non-critical and we want to develop it as usual on Ubuntu. And we have ...
0
votes
1answer
276 views

Conky - Command Output Display Limited to 256 Bytes 'tail -n20 logfile.txt'

I am trying to display the contents of a large log file on the desktop using conky. I would like the 'window' to occupy the upper half of the desktop, and show the 20 most recent lines. I use the ...
2
votes
1answer
736 views

Start jackd with realtime priority with upstart

I'm trying to start jackd with realtime priority at boot with an uptstart script but with no success so far. I'm using ubuntu server 14.04. My upstart version is 1.12.1. The user and group I'm using ...
2
votes
1answer
269 views

How to disable Lazy Preempt in kernel

I'm relatively new to Linux and working on getting a real-time kernel up and running for robot applications. I'm on Ubuntu 14.04, using kernel 3.14.3 and the 3.14.3-rt5 real-time patch. Also using x86-...
1
vote
1answer
1k views

A2DP on PulseAudio - terrible choppy/skipping audio

I have paired my Bluetooth headset with my Ubuntu 12.04 laptop with a Bluetooth chip inside: lsusb | grep Bluetooth Bus 003 Device 003: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for ...
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0answers
1k views

“ERROR: Kernel configuration is invalid”

I have been stuck on this issue for two days now and couldnt find a fix for this. I installed a realtime kernel with sudo apt-get install linux-rt because KauNet (which is an ipfw extension) ...
0
votes
1answer
2k views

VisualBoyAdvance Battery Has Run Dry

I recently downloaded VBA and Pokemon Emerald. The game says "The Internal Battery has run dry" I've been told to go to Options>Emulator>Real Time Clock, but there is no clock! I have checked ...
0
votes
1answer
149 views

Multiple kernels choices realtime or no realtime

I have a dell latitude d510 currently running xubuntu 13.04 and linux 3.8. I want this machine to host JACK processes together with EDIROL UA-25 during a live session and therefore, it needs an RT ...
1
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2answers
829 views

What is the purpose of the RTAI package in Ubuntu

RTAI (Realtime Application Interface) is a Linux kernel patch, that exposes an API to userland processes, which can be used to create very low latency and jitter programs for realtime tasks. I've ...
0
votes
1answer
835 views

Ubuntu can be used as Hard Real time OS? [duplicate]

I want OS for Beagleboard which can support HARD REAL TIME OS Feature. is Ubuntu HARD Real time OS ?
2
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0answers
826 views

How do I install a real-time kernel with a patch I need to apply? [closed]

I have ubuntu 12.04 with kernel 3.5. I have to install the RT_PREEMPT patch and I followed these steps: sudo apt-get install kernel-package fakeroot build-essential libncurses5-dev mkdir -p ~/tmp/...
2
votes
1answer
222 views

how to update dolphin file manager in real time

If I have dolphin open and I'm working in the terminal or on Windows files might be moved or added. How would I go about to make sure it updates the status of a directory of real time? Presently I ...
3
votes
2answers
348 views

Is it possible to direct system monitor output to a file?

I want to save to a text file the CPU and memory usage real-time info displayed in Gnome System Monitor 3.6. Does anybody know if this is possible? If so, how can it be done? If it's not possible with ...
0
votes
1answer
839 views

Automatically mirror a directory in Ubuntu

Running Ubuntu 12.04 I have a library of personal files and documents stored in Dropbox. I want the Dropbox folder to be automatically mirrored to a directory in the local machine, as a backup to the ...
1
vote
1answer
894 views

How to see real time updates of file system at terminal?

I am studying git and how it works with file system. I installed application called terminator, which allows me to open multiple terminals. I want to run git commands at the left terminal and want to ...
0
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2answers
2k views

12.04 Ubuntu studio PREEMPT_RT kernel options

My audio processing needs require a preempt_rt kernel. I roughly followed the guide: https://wiki.ubuntu.com/KernelTeam/GitKernelBuild with a little help from: https://rt.wiki.kernel.org/index.php/...
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1answer
379 views

How to install backported programms?

How to get backported kernel and nautilus? im on 10.04 i want fixes witch are made in 12.04 how to get them? im beeing told about installing backported kernel. On 10.04 i have some bugs witch been ...
1
vote
3answers
193 views

What can I do about the fglrx driver interfering with jackd?

The jack-audio-connection-kit needs to run in realtime mode and my system is configured accordingly. I'm using the fglxr driver. With Unity-2d everything is fine. With Unity-3d, jack-clients ...
7
votes
1answer
4k views

Using the RandR-enabled nvidia 302.xx beta driver in 12.04 with a realtime kernel

How can I use the recent beta of the 302 version of the nvidia driver (which finally supports the RandR extension!) with a realtime kernel in Precise? This question contains information on enabling ...
24
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4answers
47k views

How can I install a realtime kernel?

I have read a lot of threads with similar questions, but after reading the answers, I am very confused. I have found in them lots of url's with repositories but people discusses about which ...
2
votes
1answer
861 views

Is RTLinux the same as linux-rt?

I'm trying to install a hard realtime kernel in Lucid for some robotics work. My preference is RTLinux (http://rtlinuxfree.com) by Wind River Systems. I also see that there is a package by the name "...
1
vote
1answer
2k views

Can I install rtlinux?

How do I install rtlinux in Ubuntu? If I get it to install will it make software work abnormally?
5
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2answers
4k views

Can it be harmful to grant jackd realtime priority?

I am apt-get installing Ardour, a sound mixing program, just to try it out. Installing Ardour also installs JACK, a dependency. As part of the JACK installation script, I get the following dialog: ...
2
votes
1answer
824 views

Realtime kernel running as virtual machine

I read that using a Linux kernel (Ubuntu rt kernel) was able to increase the response time of a Java application by 4x. My only problem is that I must run a program that only has a Windows ...
3
votes
1answer
921 views

Reducing audio delay from redirecting input to output

I tried using the solution presented in a related question for redirecting my audio input to my output, but the problem is that there's a very noticeable lag. It's especially obvious to me because I ...
6
votes
2answers
2k views

Why to use ordinary kernel if there's realtime one?

What are benefits of an ordinary Ubuntu kernel compared to realtime one? What are realtime kernel's tradeoffs?
7
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4answers
6k views

How to install realtime kernel?

Axel wrote: "try using the a realtime kernel, it's more responsive and the apps "seems to hang less"". How to do this?
1
vote
2answers
425 views

How to set up video and audio players to use realtime (or close) priority?

I use raw mplayer to play video, DeaDBeeF to play audio and Skype for VoIP. Heavy CPU-consuming processes (like rendering a website in Firefox, redrawing a Java IDE window or compilation) cause ...