Daily blurbs Jan. 2007


daily blurbs

22 Jan 2007 (Mon)

00:57:28 # Life Recoding with ffmpeg with Debian / MacBook / built-in iSight. I've tried recording, and it worked. My command-line looked like this: ffmpeg -ad /dev/dsp1 -vd "/dev/video0" -vcodec mpeg4 -s 320x240 -r 25 -y test2.avi. You need to customize the '-ad' option, to select which device to use for sound capturing; I used my gamepad-mouse device, but you would usually want to use something else. It's nice to see myself moving around and talking.

16 Jan 2007 (Tue)

08:53:06 # Life Notes on debootstrap, as Joey Hess puts. Debootstrap was very inspiring. There initially was knowledge about using debootstrap and creating chroots; but that was a bit crude. pbuilder was one effort which wouldn't have started without debootstrap. Debootstrap has been used in many different ways, but by centralizing debootstrap debugging and bug tracking on pbuilder, and running daily regression tests on debootstrap as pbuilder testsuite, quality is assured. I think in that sense, debootstrap changed a significant portion of Debian and the way Debian project handles quality. 6 years. Touches me. Sniff.

09:17:54 # Life To summarize qemu-system situation. I have been told that qemu-system-mips(needs cvs version), qemu-system-mipsel(needs cvs version), qemu-system-ppc(non-free video.x is not included in Debian) do not work. I am yet to be told that qemu-system-sparc doesn't work, but it apparently doesn't. qemu-system-arm, qemu, qemu-system-x86_64 seem to be the only ones that work at the moment.

13 Jan 2007 (Sat)

21:47:13 # Life What works for qemu? I've been trying to see what really works with qemu. I have not been successful with ppc, I do not seem to be able to get the kernel booting. arm seems to work, but Debian does not distribute kernel for versatilepb. i386, x86_64 seem to be fine. mips and mipsel can't find the root file system for some reason. Apparently, you need the latest cvs version of qemu for mips. I followed aurelien's excellent procedures, but it doesn't seem to work. Looking at the logs, I have a bad feeling that this kernel may be ignoring my command-line options, or qemu may be failing to pass the command-line options to the kernel. Something tells me that powerpc kernel needs some preptool hacking, and thus needs modification for command-line handling, and I have a weird feeling that it might be similar for mips. Shrug. Hmm... so Debian ppc kernel has CONFIG_CMDLINE="console=ttyS0,9600 console=tty0", if I can change that, it would be more interesting. Debian mips qemu kernel has CONFIG_CMDLINE="" I wonder if anyone actually managed to use this kernel for qemu booting...

$ qemu-system-mips -kernel mips/boot/vmlinux-2.6.18-3-qemu  -hda /var/cache/pbuilder/base-mips.qemu -append "root=/dev/ram console=ttyS0"  -serial stdio
qemu: Warning, could not load MIPS bios '/usr/share/qemu/mips_bios.bin'
Linux version 2.6.18-3-qemu (Debian 2.6.18-8) (waldi@debian.org) (gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-20)) #1 Mon Dec 11 02:18:57 UTC 2006
serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16450
RAMDISK driver initialized: 16 RAM disks of 8192K size 1024 blocksize
ne.c:v1.10 9/23/94 Donald Becker (becker@scyld.com)
Last modified Nov 1, 2000 by Paul Gortmaker
NE*000 ethercard probe at 0x300: 52 54 00 12 34 56
eth0: NE2000 found at 0x300, using IRQ 9.
Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
ide: Assuming 50MHz system bus speed for PIO modes; override with idebus=xx
pktgen v2.67: Packet Generator for packet performance testing.
TCP bic registered
NET: Registered protocol family 1
NET: Registered protocol family 17
No filesystem could mount root, tried:  ext3 ext2 cramfs
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(1,0)


22:25:21 # Life Installing hurd for running with qemu. I just tried installing the hurd for qemu environment. the Debian official ports page seems to be up-to-date and good. Which is nice to know.

$ sudo qemu-img create /var/cache/pbuilder/hurd.img 1G
$ sudo mke2fs -o hurd  /var/cache/pbuilder/hurd.img
$ sudo mount   /var/cache/pbuilder/hurd.img  /mnt/ -o loop
$ sudo /usr/sbin/crosshurd
$ sudo apt-get install grub2
$ sudo grub-mkimage --output=/boot/grub/core.img ext2 _chain pc
$ dd if=/usr/lib/grub/i386-pc/boot.img of=fd bs=512 count=1
$ dd if=/boot/grub/core.img of=fd bs=512 seek=1
$ kvm -boot a -fda fd -hda /var/cache/pbuilder/hurd.img (not quite gotten working yet...)

then I tried to install GNU/kFreeBSD.

Then I noticed that crosshurd package is supposed to do installs for hurd, kfreebsd and knetbsd systems. Heh.

I managed to find out that, grub requires partition tables to function, grub2 doesn't seem to boot up in qemu, and I can't get any further right now.

7 Jan 2007 (Sun)

01:38:48 # Life Planning the flight for Edinburgh. I've just glanced over to see how much it costs to get there. I don't seem to be able to get the exact fares yet, but it's looking like it will be around 150000 yen (approx 1000 euros). I won't have a direct flight there, I'll be flighing through Heathrow. Humph.

Junichi Uekawa

$Id: 200701.html.en,v 1.12 2007/01/21 15:56:05 dancer Exp $