Hi,

Yesterday I did an update of my x86_64 F18 through updates-testing repository. Upon reboot, I got a blue background after gdm startup saying that things are going wrong, contact an administrator.

In dmesg, there is segfaults for gnome-shell:
gnome-shell[1229]: segfault at 88 ip 000000383f63f134 sp
00007fff5866c750 error 4 in libcogl.so.11.0.3[383f600000+8e000]
I downgraded gnome-shell, cairo, xorg-* related updates but nothing fixed the situation.

I'm using nouveau drm driver but today it happened also on my laptop with i915.

I now distro-sync'ed to updates repository after disabling
updates-testing and everything is OK.

i googled but found nothing so this is really interesting that nobody encountered this.

One more thing is that upon updating, the logged-in gnome3 desktop starts to show weird symptoms. icons disappear, evince can't open pdf files, gtk theme is rendered wrongly, etc.

Attached is the yum transaction that causes the problem.