New: After monitor standby, Xorg go to 100%

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http://bug
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           Summary: After monitor standby, Xorg go to 100%
           Product: kwin
           Version: unspecified
          Platform: SuSE RPMs
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: general
        AssignedTo: kwin kde org
        ReportedBy: alessandrosturniolo yahoo it


Version:           KWin: 3.0 (Qt: 3.3.7 - KDE: 3.5.5
"release 45.1") (using KDE KDE 3.5.5)
Installed from:    SuSE RPMs
OS:                Linux

Situation:
I've KDE 3.5.5 (from SuSE 10.1 RPM repository) and Xorg
7.2-59.1 (from SuSE 10.1 RPM repository).
When the monitor go in standby (not the system), after
resume, the Xorg process use the 100% of CPU time, and the
system become unresponsive.
I've tried to turn off DPMS, screen saver, APIC (no ACPI),
regenerate my xorg.conf with Sax2 tool (without vnc, 3d
acceleration and other "strange" options), use nv
module instead of nvidia.
Then I've noticed casually, that when kwin is not present
all work fine.
Now, when I run metacity (for example) instead of kwin, the
problem is not present.

I don't kwon if this is a problem of kwin or an xorg
problem, but when the kwin process is run, after the resume,
the system is unusable, and I've to force X server to shut
down (CTRL+ALT+Backspace).

I've this problem, in two different PC, with the same
software versions.

Here my xorg.conf file

# /.../
# SaX generated X11 config file
# Created on: 2006-11-25T18:14:31+0100.
#
# Version: 8.1
# Contact: Marcus Schaefer <sax suse de>, 2005
# Contact: SaX-User list <https://lists.berlios.de/mailman/listinfo/sax-users>
#
# Automatically generated by [ISaX] (8.1)
# PLEASE DO NOT EDIT THIS FILE!
#

Section "Files"
  FontPath     "/usr/share/fonts/misc:unscaled"
  FontPath    
"/usr/X11R6/lib/X11/fonts/misc:unscaled"
  FontPath     "/usr/share/fonts/local"
  FontPath     "/usr/share/fonts/75dpi:unscaled"
  FontPath     "/usr/share/fonts/100dpi:unscaled"
  FontPath     "/usr/share/fonts/Type1"
  FontPath     "/usr/X11R6/lib/X11/fonts/Type1"
  FontPath     "/usr/share/fonts/URW"
  FontPath     "/usr/share/fonts/Speedo"
  FontPath     "/usr/share/fonts/PEX"
  FontPath     "/usr/share/fonts/cyrillic"
  FontPath    
"/usr/share/fonts/latin2/misc:unscaled"
  FontPath    
"/usr/share/fonts/latin2/75dpi:unscaled"
  FontPath    
"/usr/share/fonts/latin2/100dpi:unscaled"
  FontPath     "/usr/share/fonts/latin2/Type1"
  FontPath    
"/usr/share/fonts/latin7/75dpi:unscaled"
  FontPath     "/usr/share/fonts/baekmuk:unscaled"
  FontPath    
"/usr/share/fonts/japanese:unscaled"
  FontPath     "/usr/share/fonts/kwintv"
  FontPath     "/usr/share/fonts/truetype"
  FontPath     "/usr/X11R6/lib/X11/fonts/truetype"
  FontPath     "/usr/share/fonts/uni:unscaled"
  FontPath     "/usr/share/fonts/CID"
  FontPath    
"/usr/share/fonts/ucs/misc:unscaled"
  FontPath    
"/usr/share/fonts/ucs/75dpi:unscaled"
  FontPath    
"/usr/share/fonts/ucs/100dpi:unscaled"
  FontPath    
"/usr/share/fonts/hellas/misc:unscaled"
  FontPath    
"/usr/share/fonts/hellas/75dpi:unscaled"
  FontPath    
"/usr/share/fonts/hellas/100dpi:unscaled"
  FontPath     "/usr/share/fonts/hellas/Type1"
  FontPath    
"/usr/share/fonts/misc/sgi:unscaled"
  FontPath    
"/usr/X11R6/lib/X11/fonts/misc/sgi:unscaled"
  FontPath     "/usr/share/fonts/xtest"
  FontPath     "/opt/kde3/share/fonts"
  FontPath     "unix/:7100"
  InputDevices "/dev/gpmdata"
  InputDevices "/dev/input/mice"
EndSection


Section "ServerFlags"
  Option       "AllowMouseOpenFail" "on"
  Option       "RandR" "on"
EndSection


Section "Module"
  Load         "type1"
  Load         "dbe"
  Load         "freetype"
  Load         "glx"
  Load         "v4l"
  Load         "extmod"
  Load         "vnc"
EndSection


Section "InputDevice"
  Identifier   "Keyboard[0]"
  Driver       "kbd"
  Option       "Protocol" "Standard"
  Option       "XkbLayout" "it"
  Option       "XkbModel" "logiik"
  Option       "XkbRules" "xfree86"
  Option       "AutoRepeat" "250 33"
EndSection


Section "InputDevice"
  Identifier   "Mouse[1]"
  Driver       "mouse"
  Option       "Buttons" "6"
  Option       "Device"
"/dev/input/mice"
  Option       "Name" "PS2++ Logitech Wheel
Mouse"
  Option       "Protocol" "explorerps/2"
  Option       "Vendor" "Logitech"
  Option       "ZAxisMapping" "4 5"
EndSection


Section "InputDevice"
  Driver       "rfbkeyb"
  Identifier   "Keyboard[2]"
  Option       "InputFashion" "VNC"
EndSection


Section "InputDevice"
  Driver       "rfbmouse"
  Identifier   "Mouse[3]"
  Option       "InputFashion" "VNC"
EndSection


Section "Monitor"
  Option       "CalcAlgorithm"
"XServerPool"
  Identifier   "Monitor[0]"
  VendorName   "PHILIPS"
  ModelName    "BRILLIANCE 107P (107P2)"
  UseModes     "Modes[0]"
  DisplaySize  338    270
  HorizSync    30.0 - 92.0
  VertRefresh  50.0 - 160.0
  Option       "DPMS"
EndSection


Section "Modes"
  Identifier   "Modes[0]"
EndSection


Section "Screen"
  DefaultDepth 24
  SubSection "Display"
    Depth      24
    Modes      "1280x1024" "1024x768"
"800x600"
  EndSubSection
  Device       "Device[0]"
  Identifier   "Screen[0]"
  Monitor      "Monitor[0]"
EndSection


Section "Device"
  BoardName    "GeForce FX 5500"
  BusID        "2:0:0"
  Driver       "nvidia"
  Identifier   "Device[0]"
  Option       "NoLogo"
  Option       "NvAGP" "1"
  Option       "AGPMode" "8"
  Option       "xv" "true"
  Option       "mtrr" "on"
  Option       "DRI" "true"
  Option       "Accel" "true"
  Option       "RenderAccel" "true"
  Option       "AccelMethod" "exa"
  Option       "EnablePageFlip" "True"
  Option       "BackingStore" "true"
  Option       "TripleBuffer" "true"
  Option       "AddARGBGLXVisuals"    
"true"
  Option       "EnablePrivateBackZ" "no"
  Option       "AllowGLXWithComposite"
"true"
  Option       "XAANoOffscreenPixmaps"
"true"
  Option       "DisableGLXRootClipping"
"True"
  Option       "XvmcUsesTextures" "true"
  Option       "Overlay" "true"
  Option       "Rotate" "off"
  Option       "DigitalVibrance" "4"
  Option       "ImageSharpening" "3"
  Option       "UseEDID" "false"
  Option       "rfbauth"
"/root/.vnc/passwd"
  Option       "rfbport" "5900"
  Option       "usevnc" "yes"
  Option       "localhost" "on"
  VendorName   "NVidia"
  Screen       0
EndSection


Section "ServerLayout"
  Identifier   "Layout[all]"
  InputDevice  "Keyboard[0]"
"CoreKeyboard"
  InputDevice  "Mouse[1]" "CorePointer"
  InputDevice  "Keyboard[2]"
"ExtraKeyboard"
  InputDevice  "Mouse[3]" "ExtraPointer"
  Option       "Clone" "off"
  Option       "Xinerama" "off"
  Option       "VNC" "3 2"
  Screen       "Screen[0]"
EndSection


Section "DRI"
    Group      "video"
    Mode       0666
EndSection


Section "Extensions"
    Option         "Composite" "Enable"
    Option         "RENDER" "Enable"
    Option         "DAMAGE" "Enable"
EndSection
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------- Additional Comments From l.lunak kde org  2006-12-11
17:36 -------
I've never seen that, so you'll need to provide more
information: After this occurs, change to text console, log
in there, find the pid of kwin ("pidof kwin"), run
"gdb -p <pid>" and type "bt" to
get the backtrace (and "quit" to leave
afterwards). Then attach the backtrace here, possibly
several of them if they differ on different runs (you gpm to
copy&paste them or run gdb as "gdb -p <pid> |
tee /tmp/gdb.txt" to also write the output to a file).
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l.lunak kde org changed:

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



------- Additional Comments From l.lunak kde org  2007-01-26
17:44 -------
Waiting for a response.
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------- Additional Comments From Rudolf.Kollien medas de 
2007-03-29 14:44 -------
I can confirm this. Using two different PC 
- SuSE 9.3, Matrox G450 Dual-Head, KDE 3.5.6
- SuSE 10.1, Nvidia GForce, Dual-Head, KDE 3.5.6

The problem came up with KDE 3.5.5. The
"X"-process consumes nearly 100% CPU. I've to
switch to the text console and do a killall -9 X as there is
no response to "Ctrl-Alt-Backspace".

In my case, the screen has to be in suspend mode for a
longer time (> 30 minutes). And not always the problem
occurs. I didn't assign this to kwin, because the X-server
itself eats my cpu.

The next time i get this error i will try to do a gdb and
attach the trace.
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------- Additional Comments From Rudolf.Kollien medas de 
2007-04-09 16:24 -------
Created an attachment (id=20216)
 --> (http://bugs.kde.org/attachment.cgi?id=20216&actio
n=view)
Two backtraces of kwin when kwin "hangs"

Archive contains two (back)traces from a KDE session
hanging. When this
happened, the "window decorations" where gone and
there is no response of any
window. Mouse moving is still possible. Keyboard input too,
but not visible
response (f.e. in Konsole's terminal window.

Looking with "top" or "ps" for the
proccess status, the "X"-server consumes
about 95%-98% of CPU.

Hope this helps.
Rudolf
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l.lunak kde org changed:

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



------- Additional Comments From l.lunak kde org  2007-04-10
11:53 -------
The backtraces don't seem to show anything interesting. When
this happens, is the backtrace always the same, even after
you leave gdb and re-attach?
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------- Additional Comments From Rudolf.Kollien medas de 
2007-04-10 12:08 -------
I didn't try to reconnect and re-attach. I only did as
instructed in comment #1. But as soon as this happens again,
i will do as you say and do a second backtrace.
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------- Additional Comments From Rudolf.Kollien medas de 
2007-04-12 11:50 -------
Created an attachment (id=20246)
 --> (http://bugs.kde.org/attachment.cgi?id=20246&actio
n=view)
Another backtrace of kwin. First and second attach to the
process.

These are two backtraces of one hanging kwin process. After
taking the first
bt, i detached and reattached to the same process. I don't
think, they differ.

Additional, i took a bt from the (looping) X process. But
don't know, if this
is of interest or helps in any way.
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------- Additional Comments From damian-wk o2 pl  2007-04-15
17:06 -------
The same happens here.
Suse 10.1, Radeon 9550, KDE 3.5.6
But in my case it also happens with the power management
turned off.
Just leaving the computer for a longer period is enough to
cause this behaviour.
And it doesn't seem to be related only to Suse.
Have a look at this: http://www.redhat.com/archives/fedora-list/20
07-March/msg02531.html
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