[Bug 211639] KDE Desktop Switching: Very slow (video included) - Upgraded from 4.2.4 to 4.3.1 and it takes a second or two to refresh the screen.

[Thomas Lübking]

https://bugs.kde.org/show_bug.cgi?id=211639


Thomas Lübking <thomas.luebking at web.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |UPSTREAM




--- Comment #3 from Thomas Lübking <thomas luebking web de>  2009-10-24 21:31:33 ---
FYI, the window manager process would be "kwin"

Marking UPSTREAM as this is atm a driver issue and KDE apps are likely affected
(indirectly) as well.

If you do not need the GL acceleration or nvidias twinview support you should
try the nv or nouveau driver

However as this is apparently about mapping and thus memory allocation you
should
a) check your xorg.conf - in doubt, try with a plain vanilla one (i.e. just
move your /etc/X11/xorg.conf out of sight - don't delete it ;-)
this should bypass forced AGP (iff), AllowSHMPixmaps (usually rather a bad
idea) or PixmapCacheSize  settings, invalid dri loading (nvidia drivers ship
their own) and deactivated RenderAccel

if anything special regarding the driver, you should consider including

Section "Extensions"
    Option         "Composite" "Disable"
EndSection

to force Composite OFF

b) the nvidia driver provides different memory allocation strategies:
nvidia-settings -q InitialPixmapPlacement
nvidia-settings -a InitialPixmapPlacement=[0-n]
will allow you to alter them with more or less instant results (though iirc
this should only affect offscreen pixmaps)

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