con la webcam collegata

[root@Mandriva_one_2008_Spring /]# tail /var/log/messages
May 11 21:46:31 Mandriva_one_2008_Spring urpmi: called with: -y kernel
May 11 21:51:28 Mandriva_one_2008_Spring kernel: Linux video capture interface: v2.00
May 11 21:51:28 Mandriva_one_2008_Spring kernel: usbcore: registered new interface driver ov51x
May 11 21:51:28 Mandriva_one_2008_Spring kernel: /var/lib/dkms/ov51x-jpeg/1.5.6-1mdv2008.1/build/ov51x-jpeg-core.c: 1.5.6 : ov51x USB Camera Driver
May 11 21:58:10 Mandriva_one_2008_Spring kernel: usb 1-1: USB disconnect, address 3
May 11 22:01:01 Mandriva_one_2008_Spring CROND[7224]: (root) CMD (nice -n 19 run-parts --report /etc/cron.hourly)
May 11 22:05:39 Mandriva_one_2008_Spring kernel: usb 1-1: new full speed USB device using uhci_hcd and address 4
May 11 22:05:39 Mandriva_one_2008_Spring kernel: usb 1-1: configuration #1 chosen from 1 choice

Invece

grep /var/log/messages non mi dice nulla, sia collegando che scollegando la webcam.