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Old 09-29-2009, 01:32 AM   #1
edgjerp
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plasma bogs down


On my desktop computer (kubuntu 9.04/x64), after running for a while, Plasma tends to become so slow it is nearly unresponsive (if I click a window on the taskbar, a it popu up about 20 secs later regardless of what I do between).
A web search finds others with plasma trouble on kubuntu, but they get total unresponsiveness of the system, while I can still use the computer. (alt-tab works to change windows, most of them respond quickly, and no processes run at max cpu. )

I just did a clean install on mostly new hardware (just old, cleaned hdds).

If I try to kill and restart plasma, the kill part works, put restarting it does not work. neither does logging out and back in. after killing plasma, only way to get it back is reboot. I have tried both with and without desktop effects enabled, much the same.

anyone know of a way to fix this?
 
Old 09-29-2009, 02:22 AM   #2
GlennsPref
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Hi, with older hardware, I recommend using kde3.5.X this will reduce the lag on your system, but give you something that is very responsive.

HTH, Glenn
 
Old 09-29-2009, 02:22 AM   #3
GlennsPref
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oops, double post. Experiencing slowdowns on my end.

Regards Glenn

Last edited by GlennsPref; 09-29-2009 at 02:23 AM. Reason: Experiencing slowdowns on my end
 
Old 09-29-2009, 02:45 AM   #4
lutusp
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Quote:
Originally Posted by edgjerp View Post
On my desktop computer (kubuntu 9.04/x64), after running for a while, Plasma tends to become so slow it is nearly unresponsive (if I click a window on the taskbar, a it popu up about 20 secs later regardless of what I do between).
A web search finds others with plasma trouble on kubuntu, but they get total unresponsiveness of the system, while I can still use the computer. (alt-tab works to change windows, most of them respond quickly, and no processes run at max cpu. )

I just did a clean install on mostly new hardware (just old, cleaned hdds).

If I try to kill and restart plasma, the kill part works, put restarting it does not work. neither does logging out and back in. after killing plasma, only way to get it back is reboot. I have tried both with and without desktop effects enabled, much the same.

anyone know of a way to fix this?
Sure, I know how to deal with it. Either acquire more system resources or don't run Plasma.
 
Old 09-29-2009, 06:35 AM   #5
edgjerp
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AMD phenom II X3 (triple core, 2,8 GHz) on AM3 socket
4GB DDR3 RAM
GeForce 9500GT 1GB V-RAM

need more system resources than this?

The parts are brand new. only HDDs are old.
 
Old 09-29-2009, 06:44 AM   #6
lutusp
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Quote:
Originally Posted by edgjerp View Post
AMD phenom II X3 (triple core, 2,8 GHz) on AM3 socket
4GB DDR3 RAM
GeForce 9500GT 1GB V-RAM

need more system resources than this?

The parts are brand new. only HDDs are old.
So run "top" and see what is going on:

Code:
$ top
Check system memory usage:

Code:
$ free
Check for HDD storage issues:

Code:
$ df
Is this a homebrew system or is it a factory-integrated box? I ask because some homebrew systems have integration bottlenecks that factory boxes don't.

Also, is this a new problem? Did a prior Linux distribution or version work OK on this system?
 
Old 09-29-2009, 05:51 PM   #7
GlennsPref
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Nice hardware. Should be working much faster, do you have 3d-rendering,

type

Code:
glxinfo | grep render
it should display your card name and yes, at least.

Have you tried to install the nVidia driver-module-package.run file?

See how you go.

http://www.nvidia.com/Download/index.aspx?lang=en-us
 
Old 09-29-2009, 06:45 PM   #8
jiml8
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I recently "upgraded" my IBM A30 Thinkpad (1 gig Celeron, 384K RAM) from Kubuntu 8.04 to 9.04, and the change has rendered the system pretty much unusable. I think I'll wind up blowing of Kubuntu and installing Mandriva. First, though, I'll play with the Kubuntu system to see if I can turn off some of the junk that is burying it. It worked just fine in 8.04, except that the wireless was not nearly as automatic as it should have been.

On my workstation, when I upgraded from Mandriva 2008.1 to 2009.1, I found myself with KDE 4.2.4, which sucks dishwater. Fortunately, the install options I selected preserved my KDE 3.5.10 installation and, when I set up KDE 4.2.4, I did it with a lot of symlinks so that critical configuration items were preserved between the two installations (such as my Mail directory...). I then ran 3.5.10 most of the time because 4.2.4 was so bad.

Just a few days ago, I upgraded to 4.3.1 which is a LOT nicer, though still with some problems and lacking some features, and I now am using it most of the time.

I have noticed that after a period of time plasma winds up hogging the CPU. I don't know why; I suppose it is a bug. But I do know how to work around it.

Start a shell window from within your KDE session. From that shell window, identify the process named plasma-desktop and kill it. Your app windows will remain open, but your taskbar(s) will vanish and the screen background will turn black. Then, in that shell window, enter the command plasma-desktop.

This will restart plasma, all your plasmoids and taskbars and so forth will reappear, and plasma will no longer hog the CPU. At least, it won't hog the CPU for awhile...
 
Old 09-30-2009, 04:46 AM   #9
GlennsPref
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Very cool jim, thanks!

Regards Glenn
 
Old 09-30-2009, 11:12 AM   #10
jiml8
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I actually did this last night on my A30, and the command in kubuntu turns out to be "plasma", not "plasma-desktop".

However, it worked as expected, as far as what it did with the desktop.

I note, though, that my Xorg installation on Kubuntu is taking up about half the CPU even when the display is idle. That ain't right.
 
Old 10-15-2009, 03:18 AM   #11
edgjerp
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Now I got to the point where plasma is slow again.

From top I see that plasma uses just over 31% memory, but not much cpu(except for short periods, when I try to make plasma do something, and then it stays in one cpu core). I have no storage issues, and plenty of memory left(both real and swap). I put the machine together myself.

I have not run any OS at all on these parts before now, as they are new.

Last edited by edgjerp; 10-15-2009 at 08:52 AM.
 
  


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