maandag, januari 30, 2006
Nokia 770 OSGi
These screenshots show a Nokia 770 with the Oscar OSGi implementation running on top of the JamVM Java virtual machine and GNU Classpath classlibraries.
maandag, januari 23, 2006
Transcoding video for the K750i
This works fine for me:
ffmpeg -i sourcevideo.avi -s qcif -b 256 -acodec aac -ab 128 -ac 2 targetvideo.mp4
ffmpeg -i sourcevideo.avi -s qcif -vcodec mpeg4 -acodec aac -r 20 -b 192 -ab 96 -ac 2 -ar 44100 targetvideo.mp4
ffmpeg -i sourcevideo.avi -s qcif -b 256 -acodec aac -ab 128 -ac 2 targetvideo.mp4
ffmpeg -i sourcevideo.avi -s qcif -vcodec mpeg4 -acodec aac -r 20 -b 192 -ab 96 -ac 2 -ar 44100 targetvideo.mp4
donderdag, januari 19, 2006
Ubuntu Breezy bug
When unmounting an external USB drive by clicking on the drive's icon and choosing "unmount volume",
the following error-message appears:
And, the strange thing is, the drive is apparantly unmounted, as there is no trace of it in either, mount or df's output.
the following error-message appears:
And, the strange thing is, the drive is apparantly unmounted, as there is no trace of it in either, mount or df's output.
woensdag, januari 18, 2006
Nokia 770
I have been playing with the ultra-cool Nokia 770! :)
Here's a pic of my RTAI LiveCD website rendered with the browser on the device (Opera).
Here's a pic of my RTAI LiveCD website rendered with the browser on the device (Opera).
maandag, januari 16, 2006
Repository moved
Due to unstability of the server that previously hosted my repository, I've moved my Ubuntu Breezy repository. The new line to add to your /etc/apt/sources.list would be:
deb http://alpha.uhasselt.be/takis.issaris/breezy/ ./
deb http://alpha.uhasselt.be/takis.issaris/breezy/ ./
vrijdag, januari 13, 2006
E17 screenshots
Some screenshots of current Enlightenment 0.17's CVS code.
E17 starting...
Various apps available in the E17 CVS repository:
Entice, a image viewer using the E17 libs:
E17 starting...
Various apps available in the E17 CVS repository:
Entice, a image viewer using the E17 libs:
GIT CVS import Ubuntu Breezy package
Added a cvsps 2.1 package to the repository as Ubuntu Breezy still ships with 2.0rc1. Version 2.1 is needed for GIT's CVS import functionality.
woensdag, januari 11, 2006
UM Linux HOWTO
This is a short howto, explaining how to setup User Mode Linux for simple Linux kernel module development and experimentation. I'm using the current Linux kernel 2.6.15 version (actually, todays GIT tree :) )
I like to keep my filesystem structure nice and clean, which is why I tend to use multiple partitions and directories for separate things. I've got a /usr/local/src directory which contains the linux-2.6 subdirectory contains the Linux kernel sourcecode. All my builddirectories are stored in /mnt/build, and so the first thing to do is to create a new entry for the Linux 2.6 UML build:
mkdir /mnt/build/linux-2.6-um
Next, enter the Linux kernel sourcecode directory:
cd /usr/local/src/linux-2.6
We'll start from the default UML configuration file for the kernel:
cp arch/um/defconfig /mnt/build/linux-2.6-um/.config
Use the defaults from that default config file:
make oldconfig ARCH=um O=/mnt/build/linux-2.6-um/
In case there's anything you want to change in the configuration of the UML kernel, start
the configuration menu:
make menuconfig ARCH=um O=/mnt/build/linux-2.6-um/
Now, we're set to do the actual building of the kernel. This will take a while...
make ARCH=um O=/mnt/build/linux-2.6-uml/
We need a disk image for the UML kernel to use. So, we'll create one. There's many ways to do this, this is a rather simple one.
First create an empty file which will kind of represent a disk drive (or actually a partition on a diskdrive):
dd if=/dev/zero of=/usr/tmp/sarge.ext2 bs=1M count=500
Put a filesystem on this partition, ext2 is fine for such a simple development system:
mkfs.ext2 /usr/tmp/sarge.ext2
Mount the filesystem image using loopback:
mount /usr/tmp/sarge.ext2 /mnt/loop/ -o loop
Copy an existing Linux distribution in this mounted filesystem image:
cp -var /usr/chroots/sarge/* /mnt/loop/
Move into the mounted filesystem and create the needed device nodes for UML:
cd /mnt/loop/dev
./MAKEDEV ubd
Next we'll install the kernel modules into the mounted filesystem:
cd /usr/local/src/linux-2.6
make modules_install O=/mnt/build/linux-2.6-uml ARCH=um INSTALL_MOD_PATH=/mnt/loop/
And finally, umount the filesystem image:
umount /mnt/loop/
Make a link named root_fs to your new partition image:
cd /usr/tmp
ln sarge.ext2 root_fs
Start the new UML kernel (and in this case, skip the default initscripts to get a real quick boot):
/mnt/build/linux-2.6-uml/linux init=/bin/bash
On the host system, create a directory for sharing files with the guest:
mkdir /tmp/forguest
In the guest system, mount this:
mount none /tmp -t hostfs -o /tmp/forguest
Now, any file appearing on the host system in /tmp/forguest, will also appear within the guest system in the /tmp directory.
Write whatever kernelmodule code (which doesn't actually access hardware since we're using UML)
you want in the /tmp/forguest directory.
Execute the following command once:
make -C /mnt/build/linux-2.6-uml/ modules ARCH=um
Build the module with the following command:
make -C /mnt/build/linux-2.6-uml/ SUBDIRS=$(pwd) modules ARCH=um
From the guest system, load the kernel module using:
insmod ./mymodule.ko
Remove it with:
rmmod mymodule
That's it! :)
I like to keep my filesystem structure nice and clean, which is why I tend to use multiple partitions and directories for separate things. I've got a /usr/local/src directory which contains the linux-2.6 subdirectory contains the Linux kernel sourcecode. All my builddirectories are stored in /mnt/build, and so the first thing to do is to create a new entry for the Linux 2.6 UML build:
mkdir /mnt/build/linux-2.6-um
Next, enter the Linux kernel sourcecode directory:
cd /usr/local/src/linux-2.6
We'll start from the default UML configuration file for the kernel:
cp arch/um/defconfig /mnt/build/linux-2.6-um/.config
Use the defaults from that default config file:
make oldconfig ARCH=um O=/mnt/build/linux-2.6-um/
In case there's anything you want to change in the configuration of the UML kernel, start
the configuration menu:
make menuconfig ARCH=um O=/mnt/build/linux-2.6-um/
Now, we're set to do the actual building of the kernel. This will take a while...
make ARCH=um O=/mnt/build/linux-2.6-uml/
We need a disk image for the UML kernel to use. So, we'll create one. There's many ways to do this, this is a rather simple one.
First create an empty file which will kind of represent a disk drive (or actually a partition on a diskdrive):
dd if=/dev/zero of=/usr/tmp/sarge.ext2 bs=1M count=500
Put a filesystem on this partition, ext2 is fine for such a simple development system:
mkfs.ext2 /usr/tmp/sarge.ext2
Mount the filesystem image using loopback:
mount /usr/tmp/sarge.ext2 /mnt/loop/ -o loop
Copy an existing Linux distribution in this mounted filesystem image:
cp -var /usr/chroots/sarge/* /mnt/loop/
Move into the mounted filesystem and create the needed device nodes for UML:
cd /mnt/loop/dev
./MAKEDEV ubd
Next we'll install the kernel modules into the mounted filesystem:
cd /usr/local/src/linux-2.6
make modules_install O=/mnt/build/linux-2.6-uml ARCH=um INSTALL_MOD_PATH=/mnt/loop/
And finally, umount the filesystem image:
umount /mnt/loop/
Make a link named root_fs to your new partition image:
cd /usr/tmp
ln sarge.ext2 root_fs
Start the new UML kernel (and in this case, skip the default initscripts to get a real quick boot):
/mnt/build/linux-2.6-uml/linux init=/bin/bash
On the host system, create a directory for sharing files with the guest:
mkdir /tmp/forguest
In the guest system, mount this:
mount none /tmp -t hostfs -o /tmp/forguest
Now, any file appearing on the host system in /tmp/forguest, will also appear within the guest system in the /tmp directory.
Write whatever kernelmodule code (which doesn't actually access hardware since we're using UML)
you want in the /tmp/forguest directory.
Execute the following command once:
make -C /mnt/build/linux-2.6-uml/ modules ARCH=um
Build the module with the following command:
make -C /mnt/build/linux-2.6-uml/ SUBDIRS=$(pwd) modules ARCH=um
From the guest system, load the kernel module using:
insmod ./mymodule.ko
Remove it with:
rmmod mymodule
That's it! :)
dinsdag, januari 03, 2006
Linux 2.6.15 released!
Fifteen years after Linus Torvalds bought the machine which got Linux started, version 2.6.15 of his kernel has been released! :)
Added an Ubuntu Breezy image to my repository. Compiled for 686, with the default 686 ubuntu kernel configuration (thus most modules/drivers are available).
And, as I'm using an NVIDIA card here, I've added the NVIDIA kernel driver package too. It's not the current NVIDIA version, but the version included in Ubuntu Breezy (7667) recompiled for the above kernel.
Linux 2.6.15 Breezy kernel package
NVIDIA 7667 driver for the above 2.6.15 Breezy kernel
Added an Ubuntu Breezy image to my repository. Compiled for 686, with the default 686 ubuntu kernel configuration (thus most modules/drivers are available).
And, as I'm using an NVIDIA card here, I've added the NVIDIA kernel driver package too. It's not the current NVIDIA version, but the version included in Ubuntu Breezy (7667) recompiled for the above kernel.
Linux 2.6.15 Breezy kernel package
NVIDIA 7667 driver for the above 2.6.15 Breezy kernel
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