hello, I'm running on centos5.3 xen [root at aberlour]# uname -a Linux aberlour 2.6.18-128.4.1.el5xen #1 SMP Tue Aug 4 21:33:24 EDT 2009 i686 athlon i386 GNU/Linux I installed elrepo to use my webcam(S). the package kmod-video4linux-xen is really installed: [root at aberlour]# rpm -qa|grep video kmod-video4linux-xen-0.0-5.20090615.el5.elrepo but when I "modprobe gspca_main" I've got. [root at aberlour]# modprobe gspca_main FATAL: Module gspca_main not found. the problem is that the module is located in the wrong directory [root at aberlour]# locate gspca_main.ko /lib/modules/2.6.18-128.el5xen/extra/video4linux/gspca_main.ko instead of: /lib/modules/2.6.18-128_.4.1._el5xen/extra/video4linux/gspca_main.ko I tried to link /lib/modules/2.6.18-128_.4.1._el5xen/extra to /lib/modules/2.6.18-128.el5xen/extra and run a depmod. But I got an error message [root at aberlour]# modprobe gspca_main FATAL: Error inserting gspca_main (/lib/modules/2.6.18-128.4.1.el5xen/extra/video4linux/gspca_main.ko): Invalid module format after having discussion (and many tests) with Phil Perry (from ELrepo) the conclusion is that their module is not compatible with CentOS XEN All the posts are here: http://lists.elrepo.org/pipermail/elrepo/2009-August/date.html#23 Can someone help ? how can I use a gspca driver ? regards philippe