Tuesday, October 30, 2007

Geb! Finally!

Yeah, finally solved the Geb challenge at rankk and finished the sacred journey, after months working on it :)

It was well worth the effort. The challenge was really enjoyable, and surely the most interesting challenge at rankk. It's just wonderful no matter how much you try, there are still something new and interesting to learn somewhere in the wilderness.

And finally, the Geb secret has been unraveled! I would like to share it with you guys but probably it'd be better if you figure it out all by yourselves :P Don't worry, if you ever need help on your way, some of the tools I created might help you ;)

Monday, October 29, 2007

Steganabara new release - 1.1.0

Hey guys,

Finally Steganabara has been improved - 1.1.0 now :)

The zoom feature has been added, finally!
The BitMask filter now has an amplify option, which will make the result easier to view for human eyes.
The color table now displays the hex values instead of the meaningless integer ones.
The color explorer now also displays the coordinates and the hex values.
And all the features are now compatible with all image panels.

You can get the binaries together with source code here: http://www.freewebs.com/quangntenemy/steganabara/Steganabara-1.1.0.tar.gz.
As I am a bit lazy atm the ready to run jar file will be updated later.

Also stay tuned for the detailed documentations.

Tuesday, October 23, 2007

Rankk interview

I was interviewed by Sphinx a few days ago, and now the interview is published at Rankk's blog. I feel honoured :) Check it out guys!

Maybe in the next few weeks you can find the interviews with valsa and Sapr0 there.

And of course if you want to know more about me, find me at irc.idlemonkeys.net on a nice saturday evening :)

Sunday, October 21, 2007


Been updating the CryptoBox today. I just can't believe how dusty the code has been. No new feature has been added yet, but the code has undergone a big Java 5 update.
The official version will be released soon :)
Oh and if you're wondering about the applet tutorial, it's not ready yet. But I promise it'll be out before new year :P

Friday, October 12, 2007

Migrating to 2008.0

Mandriva 2008.0 official was out last week, so time for me to start migrating to it :)

Downloaded the 3-CD isos, burned them with k3b, and I was ready to go.

To my experience, the installer hasn't been improved any since beta 1. It was still incredibly slow. Froze for a few minutes trying to determine the package list. And the estimated time for upgrading was 4 hours! While the packages were installed, I needed to switch the CDs dozens of times - guess things would be easier if I had a DVD burner, but really not everyone has one.

Finally, after about 1 hour and a half, installation finished. I was taken to the configuration screen. Having installed Linux many times, it didn't take long for me to finish setting everything up and ready for the first boot of the new system.

On the first boot, I wasn't surprised to see the lilo bootloader in text mode instead of the nice graphical one. It has been removed since 2007.1, and there's no chance for it to come back in 2008.0, I guess :P

I was then taken to the login screen. Well, it was quite nice with a new fancy theme. I logged into KDE, my favourite desktop environment. And... things go black and I was taken back to the login screen. Wtf???

Good thing I have fluxbox installed as an alternative desktop. Logged in without any problem, I started wandering the wilderness to find the solution to my problems. Found the following lines in my kdm.log:

0: /etc/X11/X(xf86SigHandler+0x85) [0x80c46e5]
1: [0xffffe420]
2: /usr/lib/xorg/modules//libexa.so(ExaOffscreenMarkUsed+0x69) [0xb7aa70b9]
3: /usr/lib/xorg/modules//libexa.so(exaDoMigration+0x597) [0xb7aa6ff7]
4: /usr/lib/xorg/modules//libexa.so [0xb7aa46d6]
5: /etc/X11/X(miFillGeneralPoly+0x4f5) [0x812ad85]
6: /etc/X11/X(miFillPolygon+0x62) [0x812a322]
7: /etc/X11/X [0x8174f82]
8: /etc/X11/X(ProcFillPoly+0x10a) [0x808666a]
9: /etc/X11/X [0x81532bd]
10: /etc/X11/X(Dispatch+0x1af) [0x8089d6f]
11: /etc/X11/X(main+0x465) [0x8071025]
12: /lib/i686/libc.so.6(__libc_start_main+0xe0) [0xb7c9bf90]
13: /etc/X11/X(FontFileCompleteXLFD+0x1e5) [0x80703a1]

Fatal server error:
Caught signal 11. Server aborting
While roaming around finding the solution, I noticed that X crashed even when I start other gtk-based applications like rpmdrake, harddrake, GIMP, ekiga. Totally lost, I posted my problem at http://forum.mandriva.com, hoping that anyone there could provide any idea that could help me solve the problem.

Life without everyday applications was a real pain. While trying to fix the problem, I ran into another nasty bug with rpm:
error: Runnning db->verify ...
rpmdb: PANIC: fatal region error detected; run recovery
error: db4 error(-30975) from dbenv->open: DB_RUNRECOVERY: Fatal error, run database recovery
This nasty bug is being tracked down by pixel at http://qa.mandriva.com/show_bug.cgi?id=32547. If you stumble upon it, be sure to report the bug there and help us identify the problem. In the meantime, you can use the following commands to fix the rpm database temporarily:
rm -f /var/lib/rpm/__db*
rpm --rebuilddb
Have been messing with my penguin box for so long, I didn't have any trouble getting into sleep that night, and luckily without any nightmares :P

Waking up the next morning, I decided to jump into the official mandriva irc channel at irc://irc.freenode.net/#mandriva and had a nice chat with the guys there. Finally, after gathering all the relevant ideas, I decided to replace the xorg.conf file with the old one I backed up months ago. Fortunately, this completely solved the problem!

So it turned out that x have been misconfigured somehow. I wonder if it was me who picked the wrong video card/monitor/keyboard/mouse..., or the hardware detection wasn't good enough - never had this problem before. Anyway, I had enough problems with x that I wouldn't want to compare the 2 config files to find out which line was causing the all the troubles.

Time to give the damn penguin a real torture now :P