[Bug 273476] New: KDE freeze with chipset GM45 and new resolution

[vive.marseille at voila.fr]

https://bugs.kde.org/show_bug.cgi?id=273476

           Summary: KDE freeze with chipset GM45 and new resolution
           Product: kde
           Version: 4.4
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: crash
          Priority: NOR
         Component: general
        AssignedTo: unassigned-bugs at kde.org
        ReportedBy: vive.marseille at voila.fr


Version:           4.4 (using KDE 4.4.5) 
OS:                Linux

When I set a new resolution in xorg.conf such as :

Section "Device"
        Identifier "Card0"
    Driver "intel"
EndSection
Section "Monitor"
    Identifier "LVDS1"
EndSection
Section "Screen"
        Identifier "Screen0"
    Monitor "LVDS1"
    Device "Card0"
        SubSection "Display"
                Modes "800x600"
        EndSubSection
EndSection

I got lots of DDC messages in /var/log/Xorg.0.log :

Printing DDC gathered Modelines:
Modeline "1280x800"x0.0 69.30 1280 1328 1352 1416 800 803 809 816
Modeline "1280x800"x0.0 46.22 1280 1328 1352 1416 800 803 809 816

Then, after login via kdm, sometimes KDE freezes and open hundreds dialog boxes
saying "Screen configuration has changed"

Try to add Option "NoDDC" in xorg but according to
http://manpages.ubuntu.com/manpages/maverick/man4/intel.4.html , this option is
no longer available for chipset CM45

Laptop : Dell Latitude E5500 Chipset CM45

Reproducible: Sometimes

Steps to Reproduce:
Put a new resolution in /etc/X11/xorg.conf

Actual Results:  
KDE sometimes freezes and can't be used

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