Hi i've got some more info about crash of kooka & xsane. its looks like you were right.
this is part of my Xorg.0.log SetClientVersion: 0 9 SetClientVersion: 0 9 (II) Open ACPI successful (/var/run/acpid.socket) (II) APM registered successfully (II) NVIDIA(0): Initialized GART. (II) NVIDIA(0): Setting mode "1280x1024 at 75" Backtrace: 0: /usr/bin/X(xf86SigHandler+0x7e) [0x80c780e] 1: [0xb7fc4420] 2: /usr/lib/xorg/modules/drivers//nvidia_drv.so(_nv001216X+0xe5) [0xb71dc711] 3: [0x1] Fatal server error: Caught signal 11. Server aborting so it can be nvidia..., anyway i will take a look on problem at my old matrox g400. here is also part of kern.log "Apr 3 17:13:03 static--------- kernel: [16920.863423] Xorg[7461]: segfault at 68978bfc eip 080c671b esp bffe6600 error 4" Regards