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Old 12-31-09, 07:18 PM   #1
damentz
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Exclamation [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

This new beta driver is really fast at first - much faster than 190.53 on first login using KDE4.

But, I left my laptop on over night and have been using it for several hours now and noticed kde4 is just really sluggish - this never seems to happen with 190.53. Maybe this is some memory leak in the video driver due to the new Xrender optimizations?

Right now the KDE4 system bar (whatever it is called with all listed tasks and other plasmoids) refreshes painfully slow when you highlight tasks and unhighlight. Managing plasmoids on it is even slower as the whole thing refreshes only a few times a second instead of fluidly on first boot.

Also, I noticed this driver becomes very slow after disabling kwin's composite, 190.53 doesn't do this. After disabling kwin composite, you can visibly see windows painting them self after you unhide them from behind others and clicking on other buttons.

I checked the cpu usage of kde4 (plasma and the like) and nothing seems to go over 0-1% so it doesn't seem to be a CPU bottleneck.

My graphics card only has 128mb of ram (8400m gs) and that may be the problem - but desktop should return to normal speed after everything is closed out, right?

Anyway, I ran the nvidia bug report after I noticed it running slower on my 2d desktop.

Hopefully this is of some help.
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Old 01-01-10, 02:51 PM   #2
Flyser
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

I can confirm that using a similar gpu (Quadro NVS140-M). I downgraded to 190.xx as the new driver becomes unusable very quickly.
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Old 01-01-10, 06:18 PM   #3
thefirstm
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

What KDE version are you guys using? I have an 8600m GT and KDE 4.4b2 and I have not noticed any problems.
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Old 01-01-10, 10:33 PM   #4
damentz
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

I'm using KDE 4.3.4 + QT4 4.6.0
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Old 01-02-10, 07:42 PM   #5
Plagman
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

Hi damentz,

Does it help if you VT-switch out and back to the X server when it's sluggish as you describe?
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Old 01-03-10, 01:43 AM   #6
damentz
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

Yes, switching to a tty (ctrl + alt + f1 here) then to X (ctrl + alt + f7) immediately fixes the 2d performance issues.

I mangled around with KDE4 (enabling and disabling kwin composite several times then messing with the plasmoids and resizing the desk bar) and got the window decorator to paint visibly slow and cause also visible slowness in the plasmoid updates.

After switching back and forth from X and tty, the original performance from a fresh boot is restored.
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Old 01-03-10, 05:42 AM   #7
drhirsch
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

I got some similar bevaviour while playing wow. The 3D graphics slows down over time and the fps drop - but switching to console and back immediatly fixes the problem. It doesn't matter if it is running in opengl or direct3d, or if compositing is enabled. The slow down seems to happen earlier if a lot of textures are seen.

Not sure this is related, just 2 cents.
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Old 02-06-10, 12:31 AM   #8
damentz
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

The 195.36.03 driver seems to fix what I first experienced as a video ram leak. I haven't had KDE slow down to a crawl over a large period of time (24 hours). Doing the steps I noted previously doesn't cause window borders to repaint slowly (sweet!).

Thanks for looking into this nVidia! I'm now using this driver as my production driver (previously 190.53 while 195.30 was available as the latest beta).
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Old 02-08-10, 02:54 AM   #9
kriko
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

I can confirm this being fixed - I was using Xorg for about 2 days and it still works fine.
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Old 02-11-10, 10:07 AM   #10
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

I still have these problems with the latest beta from time to time, switching out to vt fixes this.
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Old 02-12-10, 07:10 AM   #11
gqman69
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

Got the same problem even with 195.36.03
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Old 02-14-10, 01:48 AM   #12
damentz
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Default Re: [195.30] Possible Video Memory Leak (KDE4) (slows down over time)

This issue has come back for me, but the temporary fix is to actually open a terminal and do simply:

Code:
kquitapp plasma-desktop
kstart plasma-desktop
Unfortunately, I feel like this is very unnecessary. That would be like killing explorer.exe in Windows and restarting it because of a driver bug.
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