Not an expert but some time ago under Gnome I suffered something similar, the problem was udev: restarting it by by hand (something like sudo /etc/init.d/udev restart) would get things back to normal, USB devices would be detected and auto-mounted again. You haven't mentioned udev in your e-mail so maybe it's worth adding it to your list of suspects. I will let the more experienced on this list, take it from there ;-) Look at the list of packages that got modified when you did your big update, see which ones could be suspect and check their log file to see what got modified, might give a clue. -- Vincent Trouilliez <div class="gmail_quote">On Sat, Nov 17, 2012 at 9:02 AM, L.M.J <<a href="mailto:linuxmasterjedi@free.fr" target="_blank">linuxmasterjedi@free.fr</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi, The past weeks, I haven't updated my system. Yesterday, I decided to do a major "update" and then reboot like the system asked me. The whole process went fine. Problem : after the reboot, xUbuntu doesn't mount automatically my USB Pen anymore. Here is a couple of answer you should need if you could help me out : - Can I mount it by myself with "sudo mount /dev/sdb1 .." : Yes - Does the USB pens works on other computers ? Yes, on Linux or Windows. - Have you try other USB devices : Yes, same problem with other USB Pen, Digital camera USB connection... - Did you check Settings > File Manager > Advanced > Volume managed checked : Yes - And Settings > Removable Drives & Media > 3 lines "Mount removable ..." : YES - lsusb output : $ lsusb Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 004: ID 0951:1603 Kingston Technology DataTraveler 1GB/2GB Pen Drive - /var/log/syslog when I plug my USB pen : <a href="http://pastebin.ca/2252349" target="_blank">http://pastebin.ca/2252349</a> - Fdisk -l output : <a href="http://pastebin.ca/2252350" target="_blank">http://pastebin.ca/2252350</a> - Is gvfs running : Yes : <a href="http://pastebin.ca/2252351" target="_blank">http://pastebin.ca/2252351</a> - Any free space problem : Not at all. - OS version : xUbuntu 12.04.1 LTS, 3.2.0-33-generic x86_64 - Software versions : <a href="http://pastebin.ca/2252352" target="_blank">http://pastebin.ca/2252352</a> Any help is welcome to fix this issue (and don't tell me I could mount it by hand, I'm lazy ;) Thanks ! -- LMJ "May the source be with you my young padawan" -- xubuntu-users mailing list <a href="mailto:xubuntu-users@lists.ubuntu.com">xubuntu-users@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/xubuntu-users" target="_blank">https://lists.ubuntu.com/mailman/listinfo/xubuntu-users</a> </blockquote></div>