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Old 02-14-2010, 07:09 AM   #16
MTK358
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Quote:
Originally Posted by Ghitulescu View Post
Well, I'm a newbie in linux, I installed what I was suggested to install.
The ktorrent was the only client offered at the time of install, or I wasn't aware of anything else. It's awfully slow but it works well when I don't "click" it steadily.
You can try "Transmission" if you like.

Quote:
Originally Posted by Ghitulescu View Post
Java VM runs right now a copy of jdownloader. It's a brand new addition, it's not the cause, the system is slow like this for months, I simply cannot change it as my wife still works onto it.
I don't understand.

Quote:
Originally Posted by Ghitulescu View Post
Yes, 43% is normal, often goes up to 100% and stays there. The CPU fan runs like hell, then pauses, starts again, its twin PC (less memory though) is absolutely silent even when decoding MPEG-2 (DVB-S) in software.
Is the twin PC identical? Maybe it just doesn't have a speed-controlled fan. My computer has one of the best CPUs that existed at the time it was built a few months ago, and one of its cores goes to 100% when doing stuff like that.

Quote:
Originally Posted by Ghitulescu View Post
By no terminals I wanna say I don't want to type in commands to do things, I keep however a terminal open for df and chkfsk, just in case.
OK, but some things like installing software are easier from the terminal.

Quote:
Originally Posted by Ghitulescu View Post
Is it as KDE or a gnome? No idea at all, it starts as a crème (light brown) colour with Nautilus, a taskbar up (like the Windows one) and another one down (with all the open windows and the trashcan). How to find what is what? From what I've seen in google it is a gnome desktop.
Ubuntu comes with GNOME. Kubuntu comes with KDE. Xubuntu comes with Xfce.

You might have noticed that KTorrent's theme is different than most other apps, this is because KDE uses a different GUI toolkit than GNOME and Xfce.

Quote:
Originally Posted by Ghitulescu View Post
One last question: your forum loads ads from at least 4 sites before loading the posts, would it work if I'd employ such ad-blockers?
I don't understand the question, but ad blockers keep the ad from being downloaded in the first place if the image's URL matches a list of known ad websites for your region.

Last edited by MTK358; 02-14-2010 at 07:10 AM.
 
Old 02-14-2010, 09:19 AM   #17
spampig
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There is nothing wrong with being a newbie with Linux so don't let that bother you. It's a learning curve and we have all made mistakes along the way. It looks like you may have installed some KDE components into the Gnome desktop. I did this once with 'Kate' - a simple text editor. The result was a load of core KDE junk got added and the system ran like a dog funny enough - I removed it pretty quick.

In this case you have a couple of downloaders consuming nearly half of your CPU cycles on a fairly old processor. It follows that other programs will suffer as a result of this. A system running close to max may well call the system fan to speed up to cope with the load - it's normal enough. My 7.10 on an IBM Thinkcentre does just that when it is heavily loaded.

If I'm honest my view is that the software you have installed and are running for your downloading is the main issue here, coupled with the fairly slow processor it really makes the issue stand out.

Personally I would find a later version of Ubuntu (8.10 is fine and dandy) and not add KDE parts to the Gnome desktop. For your BT stuff I would use Transmission. Java applications that run in a virtual machine are not as efficient as native C coded programs, but it's quite something to see it eating half of your processor power. I'd personally be sacking that - it seriously sucks - and finding something else to do that job.

I appreciate that is probably not the answer you want, but the advice to try a fresh copy of a later Ubuntu without the additional KDE bloat is the best I can give. I can say that if I run transmission with a couple of downloads it barely touches the load:

17405 spig 20 0 49236 14m 9m S 0 0.4 0:54.38 transmission

But it *does* slow browsing down considerably - even on a fairly good DSL pipe - unless I limit the bandwidth it consumes. I would echo what somebody else said about blocking flash. I would also express concern regarding the nature of your use - and please forgive me here. If you are visiting lots of 'download' type sites, you are going to come across places that make use of system freezing flash, heavy ajax calls and other browser nasties. Please don't take this the wrong way, but if you've randomly installed things without really knowing what they are - or if they are compatible - it would support the idea of starting out again with a fresh install. If I'm blunt you need to get past the 'it can't be this' because it really probably is.
 
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Old 02-14-2010, 09:57 AM   #18
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It's still strange for me how a download manager can take all your CPU. Because the CPU should only wake up once in a while, copy a few bytes, update the GUI, and sleep again most of the time. If possible, I would ditch that program.

Perhaps the program "busy-waits"?

In case you don't know, busy-waiting means implementing a delay in a program by going in a loop and checking the time, instead of sleeping. This non-stop calculation (looping, in this case) without sleep is very intense on the CPU. Most programs actually spend almost all their time sleeping. Busy-waiting is probably a sign of a programmer that doesn't know any better and/or doesn't know how to make the program sleep.
 
Old 02-14-2010, 10:05 AM   #19
spampig
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It crossed my mind that the application was probably not well written, it's pretty easy to jam something in a 'while' type loop knowing no better. Someone recently supplied me with a five line perl script for reading caller ID information from a modem that maxed out the processor in this way.

It could also be that the program is doing something nefarious. Given the nature of the program (a downloader) and other downloaders (BT). and the system sluggishness it would be stereotypical - but probably not wide of the mark - to consider just what is going on here.

I know one thing, I would be very *scared* to be running that kind of stuff on a Windows box with no anti-virus and only an inbound hardware firewall in place!
 
Old 02-14-2010, 10:49 AM   #20
Ghitulescu
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I'll have a copy of xubunto 8.04 and see what's happening.

The PCs are absolutely clones, except for I added some RAM to the linux one (contrary to my beliefs!) and the CD-RWs which did not come as standard (industrial grade). I won't change them ...

My wife work these weeks at something important, making her to change the text editor is erh, well, can you imagine a straighter way to divorce?

In my experience, some ad providers check if you loaded the ads before letting you see the real content.

It's not jdownloader, I have it for 2-3 days, yes it's bloatware like all java applications I know, is there anything C++native for this?

Thank you guys for your time and precious advices. I'll keep you informed on the progress.

PS: I know this issue, busy-sleep, I simply did not know how is called, it's the "cheapest" way to program a polling loop.
 
Old 02-14-2010, 12:11 PM   #21
MTK358
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Quote:
Originally Posted by Ghitulescu View Post
My wife work these weeks at something important, making her to change the text editor is erh, well, can you imagine a straighter way to divorce?
What does the text editor your wife uses have to do with your problem? I haven't heard you mention a text editor before.

Quote:
Originally Posted by Ghitulescu View Post
In my experience, some ad providers check if you loaded the ads before letting you see the real content.
That never happened to me.

How could that be if you load the HTML page first, and then the browser just checks the URLs for the ad images and does not get them?

I really strongly recommend you get AdBlock Plus, it never caused me any problems. All it does is remove the annoying ads and make some pages load in about 1-2 seconds versus 30 seconds without it!
 
Old 02-14-2010, 03:15 PM   #22
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Wink

I mentioned open office work. She edit some text for some of her work. This is the main reason I won't do an update or change the system, at least until she finishes.

Xubuntu is on its way down to me
 
Old 02-14-2010, 03:26 PM   #23
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Quote:
Originally Posted by Ghitulescu View Post
I mentioned open office work. She edit some text for some of her work. This is the main reason I won't do an update or change the system, at least until she finishes.

Xubuntu is on its way down to me
OK, it's just that my definition of a text editor is a plain ASCII text editor.
 
Old 02-14-2010, 03:32 PM   #24
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After you have installed xubuntu (try to make a separate /home). With a separate /home you can upgrade all you want without loosing your private data .

Do you know medibuntu? With that you can get some useful tools installed.

See https://help.ubuntu.com/community/Medibuntu

With that you can install a lot of things, you have expressed that you want and need and some software besides that you might want to use.

Here is a hint of what I install (make sure to go to the medibuntu site first).

If you wish copy the quoted stuff and insert in the Terminal.

Quote:

sudo apt-get install gnomebaker k9copy gnome-commander pan filezilla mc mplayer wine xsane googleearth msttcorefonts w32codecs libdvdcss2 libsane-extras sun-java6-plugin sun-java6-fonts flashplugin-nonfree gimp-data-extras gimp-data gimp-help-common gimp-plugin-registry xsane-common ufraw gpaint xsane avifile-divx-plugin avifile-win32-plugin gstreamer0.10-pitfdll gstreamer0.10-plugins-bad gstreamer0.10-plugins-ugly mozilla-plugin-vlc gnome-mplayer mplayer-skins x264 non-free-codecs wine lsdvd p7zip-rar rar unace-nonfree unrar p7zip-full album pidgin-encryption pidgin-extprefs pidgin-festival pidgin-guifications pidgin-hotkeys pidgin-libnotify pidgin-librvp pidgin-plugin-pack pidgin-themes dvd95 gnome-mplayer gnome-subtitles mozilla-mplayer mplayer-fonts mplayer-skins mplayer-skin-blue smplayer smplayer-themes smplayer-translations ntp gimp-ufraw gnome-alsamixer padevchooser pavucontrol numlockx gadmin-samba gmountiso
Best regards

Stardustdk

Last edited by stardustdk; 02-14-2010 at 03:34 PM. Reason: Firefox probem
 
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Old 02-14-2010, 05:41 PM   #25
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My personal prefs for FF add-ons for avoiding junk on websites are NoScript (this is really good for preventing scripts from other websites running unless you allow them) & Flashblock.
YMMV (I've heard good things about adblockplus though)
 
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Old 02-14-2010, 06:57 PM   #26
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Quote:
Originally Posted by chrism01 View Post
My personal prefs for FF add-ons for avoiding junk on websites are NoScript (this is really good for preventing scripts from other websites running unless you allow them) & Flashblock.
YMMV (I've heard good things about adblockplus though)
I still think that an ad blocker is best because scripts and flash are often used for good.

An ad blocker blocks only bad Flash, and removes images too.
 
Old 02-14-2010, 07:14 PM   #27
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7.04 is very old and you should upgrade to 9.04.
Watch out for 9.10 as its buggy.
 
Old 02-14-2010, 11:03 PM   #28
spampig
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And blocking Flash is almost a requirement these days:

http://www.theregister.co.uk/2010/02/12/adobe_updates/

to quote the salient point:
"Flaws in Adobe software, second only to Microsoft, have been exploited in numerous targeted hacker attack over recent months"
 
Old 02-15-2010, 04:12 AM   #29
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My suggested addons to firefox: Noscript, flashblock, addblock plus, webmail notifier (gmail/hotmail etc),webmail ad blocker.

Regards
 
Old 02-15-2010, 04:26 AM   #30
spampig
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Personally I use Opera most of the time and the flash/add blocking is already built in. There is alleged to be a cross platform vulnerability in the Firefox plugin api. That said, I guess with a browser running as an unprivileged user it's 99.99% more secure on Linux than it would be on Windows :-)
 
  


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