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[marcinq <marcinq@xxxxxxxxxxxxxx>]

Public bug reported:

After the recent mesa update kwin composite in kubuntu is broken. Loging
in from kdm works, the desktop starts, but when opening any aplication
window (for example system settings) Xorg crashes and I'm back at kdm
login.  From this point also changing to terminal ctrl+alt+f1 doesn't
work as by doing that I'm left with kdm bitmap and some graphical
garbage is produced at the top of the screen.

When compositing is disabled everything is ok, also strangely when
booting up the kernel with radeon.modset=1 and using KMS compositing in
kde works as it should and the bug is gone.

My xorg.conf is unmodified default one so I'm not attaching it. The card
is radeon x1200 (rs690) on a toshiba a215-7416 laptop.

** Affects: mesa (Ubuntu)
     Importance: Undecided
         Status: New

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[karmic] newest mesa update makes kwin compositing constantly crash to kdm on radeon x1200 (rs690)
https://bugs.launchpad.net/bugs/446578
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