The problem is a diversion that an old installation of nvidia-glx-legacy left on my system. Now I don't have nvidia-glx-legacy installed anymore, but in my /var/lib/dpkg/diversions I found these lines:
/usr/lib/xorg/modules/extensions/libGLcore.a /usr/lib/nvidia/libGLcore.a.xlibmesa nvidia-glx-legacy /usr/lib/xorg/modules/extensions/libglx.a /usr/lib/nvidia/libglx.a.xlibmesa nvidia-glx-legacy /usr/lib/xorg/modules/extensions/libglx.so /usr/lib/nvidia/libglx.so.xlibmesa nvidia-glx-legacy Dpkg looks for those /usr/lib/nvidia/* files, can't find them and bails out. I removed those diversions with: dpkg-divert --rename --remove /usr/lib/xorg/modules/extensions/libGLcore.a dpkg-divert --rename --remove /usr/lib/xorg/modules/extensions/libglx.a dpkg-divert --rename --remove /usr/lib/xorg/modules/extensions/libglx.so Then xserver-xorg-core installed without problems. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]