Unfortunately I still have this problem, by the time with kubuntu 14.04. Often when the system is idling for some hours, it eventually freezes.
I again let Memtest86 running, it did 9 passes in more than 13 hours without error, so it is probably not a memory issue. There is usually an external screen connected via VGA, but I have seen the freeze also when running on battery with no external devices connected, that time while I was working. However, connecting an external screen prevents the system from suspending - for a reasoning that I can't follow - so this is why the system may idle for hours and eventually freeze, while normally it would suspend after half an hour. The syslog does not show anything besides a line of garbage at the point where it crashed: ul 20 18:40:01 linus CRON[5077]: (www-data) CMD ([ -x /usr/share/awstats/tools/update.sh ] && /usr/share/awstats/tools/update.sh) Jul 20 18:40:01 linus CRON[5076]: (smmsp) CMD (test -x /etc/init.d/sendmail && /usr/share/sendmail/sendmail cron-msp) Jul 20 18:40:01 linus sm-msp-queue[5093]: My unqualified host name (linus) unknown; sleeping for retry ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Jul 20 20:26:39 linus rsyslogd: [origin software="rsyslogd" swVersion="7.4.4" x-pid="969" x-info="http://www.rsyslog.com";] start Jul 20 20:26:39 linus rsyslogd: rsyslogd's groupid changed to 103 Jul 20 20:26:39 linus rsyslogd: rsyslogd's userid changed to 101 Jul 20 20:26:39 linus kernel: [ 0.000000] Initializing cgroup subsys cpuset Jul 20 20:26:39 linus kernel: [ 0.000000] Initializing cgroup subsys cpu Jul 20 20:26:39 linus kernel: [ 0.000000] Initializing cgroup subsys cpuacct Jul 20 20:26:39 linus kernel: [ 0.000000] Linux version 3.13.0-32-generic (buildd@kissel) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #57-Ubuntu SMP Tue Jul 15 03:51:08 UTC 2014 (Ubuntu 3.13.0-32.57-generic 3.13.11.4) Any advice on what I could do to find out what the reason for the freezes is? Cheers, Torsten ** Changed in: linux (Ubuntu) Status: Invalid => New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1255531 Title: Daily, random hard freeze/lock up during idle since 13.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1255531/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
