опять 25, и вот что в сислоге:
Код:

Sep 21 01:05:03 exerun-pc syslogd 1.5.0#1ubuntu1: restart.
Sep 21 01:05:03 exerun-pc anacron[5424]: Job `cron.daily' terminated
Sep 21 01:05:03 exerun-pc anacron[5424]: Normal exit (1 job run)
Sep 21 01:07:38 exerun-pc pppd[6059]: Terminating on signal 15
Sep 21 01:07:38 exerun-pc pppd[6059]: Connect time 25.5 minutes.
Sep 21 01:07:38 exerun-pc pppd[6059]: Sent 1085314 bytes, received 12792884 bytes.
Sep 21 01:07:38 exerun-pc pppd[6059]: Connection terminated.
Sep 21 01:07:39 exerun-pc pppd[6059]: Exit.
Sep 21 01:07:43 exerun-pc pppd[7126]: Plugin rp-pppoe.so loaded.
Sep 21 01:07:43 exerun-pc pppd[7128]: pppd 2.4.4 started by root, uid 0
Sep 21 01:07:43 exerun-pc pppd[7128]: PPP session is 6460
Sep 21 01:07:43 exerun-pc pppd[7128]: Using interface ppp0
Sep 21 01:07:43 exerun-pc pppd[7128]: Connect: ppp0 <--> eth0
Sep 21 01:07:44 exerun-pc pppd[7128]: PAP authentication succeeded
Sep 21 01:07:44 exerun-pc pppd[7128]: peer from calling number 00:90:1A:43:16:28 authorized
Sep 21 01:07:44 exerun-pc pppd[7128]: Cannot determine ethernet address for proxy ARP
Sep 21 01:07:44 exerun-pc pppd[7128]: local IP address 87.225.61.198
Sep 21 01:07:44 exerun-pc pppd[7128]: remote IP address 172.25.0.52
Sep 21 01:07:44 exerun-pc pppd[7128]: primary DNS address 194.85.113.244
Sep 21 01:07:44 exerun-pc pppd[7128]: secondary DNS address 213.59.136.245
Sep 21 01:17:01 exerun-pc /USR/SBIN/CRON[7190]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Sep 21 01:29:08 exerun-pc dhclient: DHCPREQUEST of <null address> on eth0 to 192.168.1.1 port 67
Sep 21 01:29:08 exerun-pc dhclient: DHCPACK of 192.168.1.2 from 192.168.1.1
Sep 21 01:29:08 exerun-pc NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface eth0
Sep 21 01:29:08 exerun-pc dhclient: bound to 192.168.1.2 -- renewal in 1431 seconds.
Sep 21 01:33:08 exerun-pc kernel: [ 3262.558727] atkbd.c: Unknown key released (translated set 2, code 0x8b on isa0060/serio0).
Sep 21 01:33:08 exerun-pc kernel: [ 3262.558733] atkbd.c: Use 'setkeycodes e00b <keycode>' to make it known.
Sep 21 01:29:08 exerun-pc dhclient: DHCPREQUEST of <null address> on eth0 to 192.168.1.1 port 67
Sep 21 01:29:08 exerun-pc dhclient: DHCPACK of 192.168.1.2 from 192.168.1.1
Sep 21 01:29:08 exerun-pc NetworkManager: <info> DHCP daemon state is now 3 (renew) for interface eth0
Sep 21 01:29:08 exerun-pc dhclient: bound to 192.168.1.2 -- renewal in 1431 seconds.
выделенные строчки, обратите внимание на них, примерно на это время выпало отключение. точнее не совсем отключение. пакеты с менеджера обновлений загружались, но сайты нет...
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однозначно замечено, что когда отключается инет, то в сислоге появляются такие строчки. что делать?