eduardofleury.com Archives: Linux
next page · previous page
21 August 2008
Improving QEdje and Qt performance with nvidia drivers.
Hey all, You may have been following the buzz around bad 2D performance of nvidia-drivers, specially with KDE 4. Well, I found out that QEdje was running slower than it could on my machine due to the same reason. Zack Rusin released yesterday a nice benchmark utility for Qt, QGears2, which I used to measure [...]
continue reading... » 2 Comments
20 August 2008
emerge world reinstalling everything… not anymore :-)
I’m running ~x86 Gentoo here, eix-sync && emerge -Dav world every few days till something strange started happening. Portage wanted to reinstall everything, I mean, hundreds of packages to the same version as before, no new use, no new anything, just reinstall all packages for the pleasure of compiling and heating up my Macbook pro [...]
continue reading... » 3 Comments
20 August 2008
Running x11perf on Maemo (N800)
Hi all, this post is about some benchmarks we did on Nokia’s N800 device to measure the performance of XShmPutImage on this hardware. I’ve been working on the QEdje project and, while studying possible optimizations, our team was interested in measuring whether we could benefit from using MIT’s X11 shared memory extensions. Among other tests, [...]
continue reading... » 5 Comments
4 August 2008
KDE unresponsible after screensaver is locked for several hours.
Hi all, I’m currently using Gentoo ~x86 on a Macbook Pro and I’d been facing a really annoying bug for sometime before I could apply a workaround to it. The bug sympthons are a very unresponsible system after leaving the screen locked for several hours, ie. all night, for instance, simply unlocking it was almost [...]
continue reading... » One Comment
8 April 2008
Running Canola2 plug-ins on the desktop
Hey, A few days ago the Canola2 SDK was released allowing users to run Canola2 on their Linux desktops for plug-ins and themes development. In this post I’ll show how one can add plugins to the SDK. What you need When deploying plugins to Canola2 SDK one must observe three main steps: Install plug-in code [...]
continue reading... » 2 Comments
13 November 2007
Termios functions, the unix terminal canonical mode and other settings.
A few days ago I was rewriting in C an old piece of script originally coded in BASH. Although the code was pretty simple, I found something that was worth sharing. Basically I had to get a confirmation from the user (y/n) – ie. read char from the standard input – and process it accordingly. [...]
continue reading... » 2 Comments
23 September 2007
AF_UNIX sockets and the abstract namespace, inter-process communication.
Hi all, today I’ll write something about sockets of the AF_UNIX family (aka as AF_LOCAL) and more specifically about the “abstract namespace” held by the Linux kernel. Previous knowledge Before I start, let me share what I expect you to know before reading this article, and also some references in case you are not familiar [...]
continue reading... » 5 Comments
28 August 2007
Bug in BOOTP servers? (ISC Dhcp and Bootp-dd2)
About two weeks ago I posted an introduction on the BOOTP protocol, today I’ll talk about a possible bug I found in current implementations. I recommend those not familiar with this protocol read my previous post here before continuing. Abstract My current project at the Brazilian IBM LTC (Linux Technology Center) lab is to develop [...]
continue reading... » One Comment
20 August 2007
Conseguindo CDs do Linux Ubuntu no Brasil
Pessoal, Ainda no tema da palestra de quinta feira sobre Linux e Segurança na Infoweek (ver post anterior), fica aqui uma dica para quem quer testar o Linux e não sabe direito por onde começar. Como eu comentei na quinta, uma das distribuições mais usadas e que têm um apelo aos usuários iniciantes em Linux [...]
continue reading... » One Comment
17 August 2007
Infoweek – EM Leandro Franceschini
Bom dia!! Ontem tive o prazer de conduzir uma palestra sobre Linux, Windows e Segurança na Escola Municipal Leandro Franceschini em Sumaré, SP, como parte do programa de Iniciativa Acadêmica da IBM (ver post anterior). Antes de mais nada gostaria de deixar meus sinceros agradecimentos a todos aqueles que me receberam de braços abertos na [...]
