Description of problem:
Every time I start KDE, plasma crashes and then, after closing the Bug Report Window, the whole screen goes black. I'm still able to launch programs by pressing ALT+F2 and writing the command line for each application, but never get to see my desktop nor the task bar, dock, or whatever staging area for the current apps running.

I'm running my box under init 3 (no KDM at boot time). I first log in to a
console session and then launch KDE using "startx". I do this as a precaution
due to my very BAD experiences with ATI's fglrx proprietary drivers (even under
Mandriva) on several different video cards. My current video card is a 1GB RAM Radeon HD 3850 AGP  --  yes, AGP! I needed to boost an old game station for my
visitors ;-)  

PLEASE NOTE: this exact behavior ALSO occurs when using Xorg's "ati" driver

Version-Release number of selected component (if applicable):

How reproducible:
Every time I attempt to launch KDE using startx command.

Steps to Reproduce:
1. Open a console session
2. Execute startx


SOME BACKGROUND
---------------
Before having this issue, I wasn't even able to start a console session as the whole box would freeze at boot time (with the screen full of color noise). The latter issue was due to a firmware problem of Mageia with ATI cards. To solve it I had to update the firmware and rebuild the initrd image:

[theo@homelinux ~]$ urpmi radeon-firmware
[theo@homelinux ~]$ bootloader-config --action rebuild-initrds

The following link shows my exact original problem plus the solution:
https://bugs.mageia.org/show_bug.cgi?id=1471

After the above instructions were carried out I was able to start a console session and launch KDE by using the startx command, but with the plasma-crash issue detailed at the beginning.


ERRORS
------

I tried running plasma thru the command line and still crashes -- duh! -- but I
get more detailed errors -- hopefully meaningful to someone!

[theo@homelinux ~]$ plasma-desktop 
QDBusObjectPath: invalid path ""
QDBusObjectPath: invalid path ""
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
Object::connect: No such slot AbstractItemView::iconSettingsChanged()
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
Object::connect: No such signal KWindowSystem::windowChanged(WId,unsigned
long*)
plasma-desktop(16918)/libplasma Plasma::FrameSvg::resizeFrame: Invalid size
QSizeF(0, 0) 
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 57 (X_CopyGC)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 1 (X_CreateWindow)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 84 (X_AllocColor)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 1 (X_CreateWindow)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 104 (X_Bell)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 1 (X_CreateWindow)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Major opcode: 123 ()
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 2 (X_ChangeWindowAttributes)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Extension:    152 (Uknown extension)
  Minor opcode: 1 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 5 (X_DestroySubwindows)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    192 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 1 (X_CreateWindow)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    207 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 1 (X_CreateWindow)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    225 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 1 (X_CreateWindow)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    248 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 5 (X_DestroySubwindows)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 17 (X_GetAtomName)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 3 (X_GetWindowAttributes)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 45 (X_OpenFont)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 1 (X_CreateWindow)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 80 (X_CopyColormapAndFree)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 1 (X_CreateWindow)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 101 (X_GetKeyboardMapping)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 2 (X_ChangeWindowAttributes)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Major opcode: 0 ()
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 19 (X_DeleteProperty)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 45 (X_OpenFont)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 83 (X_ListInstalledColormaps)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 105 (X_ChangePointerControl)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Extension:    129 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    170 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    198 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    227 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Major opcode: 0 ()
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 27 (X_UngrabPointer)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 51 (X_SetFontPath)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 81 (X_InstallColormap)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 112 (X_SetCloseDownMode)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Extension:    135 (Uknown extension)
  Minor opcode: 1 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    160 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    186 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    201 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    221 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadRequest (invalid request code or no such operation) 1
  Extension:    247 (Uknown extension)
  Minor opcode: 0 (Unknown request)
  Resource id:  0x3e0006e
X Error: BadLength (poly request too large or internal Xlib length error) 16
  Major opcode: 19 (X_DeleteProperty)
  Resource id:  0x3e0006e
plasma-desktop: xcb_io.c:221: poll_for_event: Assertion `(((long)
(event_sequence) - (long) (dpy->request)) <= 0)' failed.
KCrash: Attempting to start /usr/bin/plasma-desktop from kdeinit
sock_file=/home/theo/.kde4/socket-homelinux.theo.cl/kdeinit4__0
plasma-desktop(16917): Communication problem with  "plasma-desktop" , it
probably crashed. 
Error message was:  "org.freedesktop.DBus.Error.ServiceUnknown" : " "The name
org.kde.plasma-desktop was not provided by any .service files" " 

[theo@homelinux ~]$ KCrash: Application 'plasma-desktop' crashing...
KCrash: Attempting to start /usr/lib/kde4/libexec/drkonqi from kdeinit
sock_file=/home/theo/.kde4/socket-homelinux.theo.cl/kdeinit4__0

[theo@homelinux ~]$