Hi I have serious reboot problem since a long time. I discovered that if i "service autofs stop" before reboot, there's no problem with reboot. Here my autofs confs : # dpkg --get-selections | grep autofs autofs install autofs-ldap install autofs5-ldap install # apt-cache policy autofs autofs: Installé : 5.0.7-3ubuntu3 Candidat : 5.0.7-3ubuntu3 Table de version : *** 5.0.7-3ubuntu3 0 500 http://fr.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages 100 /var/lib/dpkg/status # cat auto.master | grep -v "#" +dir:/etc/auto.master.d +auto.master # ls -altr auto.master.d total 32 -rw-r--r-- 1 root root 11 sept. 22 14:53 home -rw-r--r-- 1 root root 107 sept. 22 15:50 net -rw-r--r-- 1 root root 44 sept. 23 07:44 net.autofs -rw-r--r-- 1 root root 53 sept. 23 07:45 home.autofs drwxr-xr-x 2 root root 4096 sept. 23 07:45 . drwxr-xr-x 171 root root 12288 sept. 23 07:47 .. # cat auto.master.d/home +auto.home # cat auto.master.d/net local -fstype=nfs4,ro,proto=tcp,port=2049 nfs1:/bin commun -rw,soft,intr nfs2:/home/commun # cat auto.master.d/home.autofs /auto_home /etc/auto.master.d/home --timeout=10 # cat auto.master.d/net.autofs /net /etc/auto.master.d/net --timeout=10 # cat /etc/default/autofs | grep -v "#" MASTER_MAP_NAME="/etc/auto.master" TIMEOUT=3 BROWSE_MODE="no" LOGGING="verbose" LDAP_URI="ldap://#.#.#.#" SEARCH_BASE="dc=#,dc=#,dc=#" MAP_OBJECT_CLASS="nisMap" ENTRY_OBJECT_CLASS="nisObject" MAP_ATTRIBUTE="nisMapName" ENTRY_ATTRIBUTE="cn" VALUE_ATTRIBUTE="nisMapEntry" When i desactive one of these inputs (or /net or /auto_home), reboot works fine. Here's my logs since the last reboot :: #cat /var/log/syslog | egrep 'automount|autofs|ldap|nscd|nslcd' Sep 23 07:44:14 localhost nslcd[1328]: [a5ee64] ldap_search_ext() failed: Can't contact LDAP server: Broken pipe Sep 23 07:44:14 localhost nslcd[1328]: [a5ee64] no available LDAP server found, sleeping 1 seconds Sep 23 07:44:18 localhost nslcd[1328]: [330624] request denied by validnames option Sep 23 07:44:25 localhost nslcd[1328]: [a5ee64] failed to bind to LDAP server ldaps://10.6.200.209: Can't contact LDAP server: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [a5ee64] no available LDAP server found: Can't contact LDAP server: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [ffca11] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [ffca11] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [27709e] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [27709e] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [ea1109] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [0f59dc] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [0f59dc] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [b7e0aa] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [b7e0aa] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [eb5bd4] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [6dd9ac] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [6dd9ac] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [4211f2] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [4211f2] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [885e1b] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:25 localhost nslcd[1328]: [272110] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [04a8af] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:25 localhost nslcd[1328]: [16703b] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:35 localhost nslcd[1328]: [ebc550] request denied by validnames option Sep 23 07:44:41 localhost nslcd[1328]: [f6d648] ldap_search_ext() failed: Can't contact LDAP server: Broken pipe Sep 23 07:44:41 localhost nslcd[1328]: [f6d648] no available LDAP server found: Can't contact LDAP server: Bad file descriptor Sep 23 07:44:41 localhost nslcd[1328]: [b7d447] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:41 localhost nslcd[1328]: [b7d447] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:41 localhost nslcd[1328]: [2ac315] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:41 localhost nslcd[1328]: [2ac315] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:41 localhost nslcd[1328]: [ee015c] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:41 localhost nslcd[1328]: [fc4fbb] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:41 localhost nslcd[1328]: [fc4fbb] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:41 localhost nslcd[1328]: [c1016f] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:41 localhost nslcd[1328]: [c1016f] no available LDAP server found: Server is unavailable: Connection timed out Sep 23 07:44:41 localhost nslcd[1328]: [f18422] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:41 localhost nslcd[1328]: [ef0119] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:41 localhost nslcd[1328]: [ef0119] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:41 localhost nslcd[1328]: [f324ba] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:41 localhost nslcd[1328]: [f324ba] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [01579b] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [da307d] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [da307d] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [55a5f5] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [55a5f5] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [b8370b] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [801ee1] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [801ee1] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [88ac1a] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [88ac1a] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [b8011c] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [a78f7f] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [a78f7f] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [72bd23] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:42 localhost nslcd[1328]: [72bd23] no available LDAP server found: Server is unavailable: Resource temporarily unavailable Sep 23 07:44:55 localhost nslcd[1328]: [c75af8] request denied by validnames option Sep 23 07:45:11 localhost automount[1221]: message repeated 18037 times: [ 1 remaining in /net] Sep 23 07:45:12 localhost automount[1221]: expiring path /net/local Sep 23 07:45:12 localhost automount[1221]: expired /net/local Sep 23 07:45:13 localhost automount[1221]: umounted indirect mount /auto_home Sep 23 07:45:13 localhost automount[1221]: shut down path /auto_home Sep 23 07:45:13 localhost automount[1221]: umounted indirect mount /net Sep 23 07:45:13 localhost automount[1221]: shut down path /net Sep 23 07:45:13 localhost automount[1221]: autofs stopped Sep 23 07:45:13 localhost automount[9949]: Starting automounter version 5.0.7, master map /etc/auto.master Sep 23 07:45:13 localhost automount[9949]: using kernel protocol version 5.02 Sep 23 07:45:13 localhost automount[9949]: mounted indirect on /auto_home with timeout 10, freq 3 seconds Sep 23 07:45:13 localhost automount[9949]: mounted indirect on /net with timeout 10, freq 3 seconds Sep 23 07:45:13 localhost automount[9949]: attempting to mount entry /net/local Sep 23 07:45:13 localhost automount[9949]: mounted /net/local Sep 23 07:45:16 localhost automount[9949]: 1 remaining in /net Sep 23 07:45:23 localhost nslcd[1328]: [e67713] request denied by validnames option Sep 23 07:47:15 localhost automount[1228]: Starting automounter version 5.0.7, master map /etc/auto.master Sep 23 07:47:15 localhost automount[1228]: using kernel protocol version 5.02 Sep 23 07:47:17 localhost nslcd[1337]: version 0.8.13 starting Sep 23 07:47:17 localhost nslcd[1337]: accepting connections Sep 23 07:47:17 localhost nslcd[1337]: [8b4567] request denied by validnames option Sep 23 07:47:17 localhost automount[1228]: mounted indirect on /auto_home with timeout 10, freq 3 seconds Sep 23 07:47:17 localhost automount[1228]: mounted indirect on /net with timeout 10, freq 3 seconds Sep 23 07:47:17 localhost automount[1228]: attempting to mount entry /net/local Sep 23 07:47:17 localhost automount[1228]: mounted /net/local Sep 23 07:47:20 localhost nslcd[1337]: [b127f8] request denied by validnames option Sep 23 07:47:20 localhost nslcd[1337]: [16231b] request denied by validnames option Sep 23 07:47:20 localhost nslcd[1337]: [16e9e8] request denied by validnames option Sep 23 07:47:20 localhost nslcd[1337]: [90cde7] request denied by validnames option Sep 23 07:47:21 localhost automount[1228]: 1 remaining in /net Sep 23 07:47:26 localhost nslcd[1337]: [9a769b] request denied by validnames option Sep 23 08:04:03 localhost nslcd[1337]: [f32454] ldap_result() failed: Can't contact LDAP server Sep 23 08:04:03 localhost nslcd[1337]: [a88611] ldap_result() failed: Can't contact LDAP server Sep 23 08:04:03 localhost nslcd[1337]: [36c40e] ldap_result() failed: Can't contact LDAP server Sep 23 08:04:04 localhost nslcd[1337]: [901d82] ldap_result() failed: Can't contact LDAP server Sep 23 08:04:04 localhost nslcd[1337]: [7b8ddc] ldap_result() failed: Can't contact LDAP server Sep 23 08:04:08 localhost nslcd[1337]: [a64e2a] request denied by validnames option Sep 23 08:06:11 localhost nslcd[1337]: [2342ec] request denied by validnames option Sep 23 08:07:12 localhost nslcd[1337]: [487cb0] request denied by validnames option Sep 23 08:08:22 localhost nslcd[1337]: [4ed43b] request denied by validnames option Sep 23 08:14:13 localhost nslcd[1337]: [386575] request denied by validnames option Sep 23 08:20:02 localhost nslcd[1337]: [90700b] request denied by validnames option Sep 23 08:22:15 localhost automount[1216]: Starting automounter version 5.0.7, master map /etc/auto.master Sep 23 08:22:15 localhost automount[1216]: using kernel protocol version 5.02 Sep 23 08:22:16 localhost nslcd[1330]: version 0.8.13 starting Sep 23 08:22:16 localhost nslcd[1330]: accepting connections Sep 23 08:22:16 localhost nslcd[1330]: [8b4567] request denied by validnames option Sep 23 08:22:17 localhost automount[1216]: mounted indirect on /auto_home with timeout 10, freq 3 seconds Sep 23 08:22:17 localhost automount[1216]: mounted indirect on /net with timeout 10, freq 3 seconds Sep 23 08:22:17 localhost automount[1216]: attempting to mount entry /net/local Sep 23 08:22:17 localhost automount[1216]: mounted /net/local Sep 23 08:22:19 localhost nslcd[1330]: [e2a9e3] request denied by validnames option Sep 23 08:22:19 localhost nslcd[1330]: [45e146] request denied by validnames option Sep 23 08:22:19 localhost nslcd[1330]: [5f007c] request denied by validnames option Sep 23 08:22:19 localhost nslcd[1330]: [d062c2] request denied by validnames option Sep 23 08:22:21 localhost automount[1216]: 1 remaining in /net Sep 23 08:22:26 localhost nslcd[1330]: [55585c] request denied by validnames option Have a nice day everybody.