Gentoo Users, QT

I was recently updating my gentoo system when I came across a puzzling issue. I was getting updates for QT 4.6.x as well as 4.7.x and there were conflicts all over the place. At least 12 were listed when attempting to emerge world.

I removed all QT 4.7.x packages rather foolishly to see if the conflicts would clear up, which they didn't. After looking closely at some of the packages, it seems that K3b was bringing in all these older qt updates. I removed it from my system, but the problem still persisted. That's why I'm writing this down. I had to explicitly mask the package in order for the problem to go away.

(as root)

echo "app-cdr/k3b" >> /etc/portage/package.mask

My laptop's already not allowing me to use my cdrom very well, perhaps it's dying. I can't burn or play dvd's on it. Keeps giving me HAL errors, regardless of whether it's running. Other burners don't see the drive either.

Anyway, I'll be heading up for the Global Game Jam soon. Cheers, y'all.

Technical-tainment

So as I'm sitting here at the table, drinking my light-roast coffee and feeling pretty good about life, it's time to let my readers know (all 1 of them, me) about some cool techy stuff that my mind is on.

http://kernelnewbies.org/Linux_2_6_32#head-935c2274be57c1585f23d91d185888ed0b6e0567

The above link is to the changelog for kernel 2.6.32 (which I currently use) and its improvements. Notably, some great improvements have been done in virtualization as with KSM (Kernel Shared Memory), a daemon process goes through page files determining which files are the same and merges them to reduce memory usage. That in itself is great but it doesn't put anything in perspective. Until you read the following:

"The result is a dramatic decrease in memory usage in virtualization environments. In a virtualization server, Red Hat found that thanks to KSM, KVM can run as many as 52 Windows XP VMs with 1 GB of RAM each on a server with just 16 GB of RAM."

If an XP machine was to be run under minimum requirements, using 128 MB of Ram, you'd get a barely functional OS and 52 of them would use a total of 6.656 GB of Ram. I've used XP in a VirtualBox VM using 512 MB of Ram and got some decent performance out of it. (Ran SAP and Borland Together in it; not at the same time) So assuming that each user is limited to a 512 MB Windows XP Pro OS, you'd be looking at a total of 26.624 GB of Ram required if these were dedicated machines. By sharing memory and having 52 XP machines running on a bare-bones Hardware Virtualization using Red Hat, each OS would require 307 MB of Ram if it were dedicated, but as it's sharing memory, the end result would mean more Ram to use. Assuming having shared memory resulted in each OS feeling as though it had 512 MB of Ram, that's a savings of ~10 GB of Ram, or an efficiency of 166.4% (2/3rds greater) over dedicated Ram resources.

And that's just one kernel improvement. I wonder how Windows kernel is doing in comparison.

The 2.6.32 kernel also has scheduler improvements in its CFQ low-latency mode.

Some people have had issues with KDE's Akonadi, getting a "Not Registered At DBUS" message. From my limited experience in dealing with this error, it generally only happens when trying to use an external SQL database. I believe that this is an upstream issue, as Akonadi is constantly being worked on during this time and big things are expected of it. (This has been tested on a KDE 4.3.5 and 4.4.2 system) The internal database doesn't seem to have this issue; it works at least, though sometimes produces a warning message. It may take a few more releases before this bug is dealt with,

In one Fedora forum, it seems that using an external sql database works under the root user. I wouldn't recommend this route.

Others say that it's an AppArmour issue, that it is blocking akonadi. It seems odd, as I still got this issue using Gentoo which doesn't have that firewall installed. The developer team which worked on it has been layed off as well.

http://news.cnet.com/8301-13580_3-9796140-39.html?part=rss&subj=news&tag=2547-1_3-0-5

There are some issues with Gentoo's KDE Unstable 4.4.2 release, though that's to be expected.

Sometimes closing Kontact does not completely close it and attempting to run it again will have no effect. The process must be killed before it can be sucessfully launched again.

Kile (2.1 beta 2 & 3) seems to have an issue where closing the program results in an unexpected error minutes later or if the program is left open, unattended for too long. It doesn't seem to impact my work (autosave it on) and is more of an annoyance. Still, it's a great program for working in LaTeX.

Umbrello is a nice UML modeller program, but I get segfaults semi-regularly. I'm not sure why that is and I still use it. This doesn't seem restricted to the unstable KDE release, but I thought I'd point it out anyway.

Some final thoughts on KDE 4.4.2: It's faster, looks better, and has more functionality. I'm getting used to tabbed file browsing and I like where the KDE team is headed.

A special thanks to Aaron J. Seigo, a KDE guru and expert. This guy is real inspiration and I hope to do some work on KDE in the near future.

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Life to CURDATE();

School's almost done and the whether is cold and blizzardy. Or, at least it was a few nights ago; That's true Canadian weather for you.

I'm currently finished writing all my assignments and have a quiz and presentation left before I am free at long last. All this free time has also meant I've been tinkering around with my computer more often than usual. Take, for instance, yesterday. While no one was around to see it, I basically spent the whole day compiling on my laptop. A lot has happened since my last post and allow me to bring you up to speed.

+ Sold my Alienware machine that I previously had Gentoo on. Sad, I miss the machine, but some hardware or driver hiccups meant that it was constantly freezing. I'm wary that the problems stemmed either from a bad hard drive or the Vista drivers it came with. Perhaps it is also indicitive of some poor Kernel drivers too, I dunno. Doubtful though. One strange issue I had is that after installing Kubuntu 8.10, it would freeze if and only if the power manager was not on performance. Well such is life. Sold it, payed for another month of insurance, and purchased a beautiful Thinkpad T60 for a fraction of the Alienware's cost.

+ T60 Specs: 2.0 GHz Core Duo, 2GB DDR2 Ram, 512 MB x1400 ATI Radeon video (128 MB dedicated), 100GB 5400 rpm hard drive, 1400x1050 resolution, keyboard light, security fingerprint reader, and a decent speaker system. Total Price? $375. It was a deal to be sure, the last one in stock. Looked brand new except for the outer lid which had some scratches on it. This runs really cool, standard at 40 degrees idle to around 50-70 when working, compiling, and of course, running flash videos. It doesn't have amd64 support unfortunately, one thing I miss. But the keyboard on this thing is where it really shines. IBM and keyboards are like bread and butter. Perhaps I'll pick up an IBM Model M in my lifetime. I remember using them way back and enjoying every minute of it.

+ Installed Gentoo on the T60. Overall, things went smoothly on the third install attempt. I have issues with perfection and things weren't up to snuff the first two times. But I'm becoming more comfortable with the Gentoo environment and more prone to try fixing problems as opposed to the 'reinstall when something goes wrong' methodology which I have yet to shake off. I installed KDE 4.3.5 and that ran wonderfully.

+ Compiled a kernel for my T60. I need to enable plug-and-play usb mouse and keyboard support as those don't work yet, as well as the radeon fb compiled into the kernel. Currently it's as a module which doesn't work. However, responsiveness since the upgrade has increased wonderfully; A pre-emptive high low-latency kernel also helps.

+ Installed KDE 4.4 series unstable on Gentoo. Had some issues, will mention them in my next post. Still loved every minute of using this faster, more streamlined system.
+ Preparing my resume for my life as a cubicle slave. Just kidding though. While I have no qualms about being a code monkey/data entry clerk/ tech documentor, it's not something my ambition will sit well with over the years. I am in fact hoping to eventually work with the government on education, but we'll see where that leads me.

+ Excited to work on my own projects and plans, make some money, pay off debts (first priority), and collect more computer toys. While I love having the fastest and greatest/latest electronic toys in my paws, I also have learned to appreciate the stability and endurance of legacy machines. Remember when towers were made of steel? IBM Keyboard Model M's are still known for their quality. Nowadays, we get cheap keyboard crap built into plastic laptops such as the Toshiba A9, with one of the most gimped keyboards I've ever used. I'm still not sure which is worse: a small backspace key, or a small shift key. Both irritate me like a papercut to the eyeball.

And so, now with a moderately set up Gentoo machine with KDE I feel I am ready to start programming full force, starting with basic plasmoids and simple GUI's in QT4. I still hope to work in Java and am very proud of a Binary Search Tree I built last year for my college. Why are people still using ArrayLists and the like?


Check out my next post for KDE-specific notes and a very frustrating error I think I've gained an understanding on.