Yesterday we were unable to connect to floradev via ssh or browser. The VM control panel indicated ther server was running, no apparent alarms/warnings or recent maintenance. We restarted the server, which seemed to correct the problem. Today, the same problem. Restarted the server again and inspected log files. After about 30 mins while looking through the log files via ssh the connection was dropped, possibly due to inactivity (I was viewing the log with vi rather than tail), but again the server is not accepting new connections. Yesterday after the reboot, I was interacting with the server regularly and never lost the connection while I was working. In addition, I closed and reopened the connection multiple times. This leads me to believe it has something to do with the idle/power-save or some related feature.
The only atypical log entry around the last failure:
feb 29 16:37:02 floratest syslog-ng[3165]: STATS: dropped 0
However, this event is logged regularly.
Another reason I think this related to the power-save is some error messages noted during reboot:
Feb 29 17:05:35 floratest rcpowersaved: CPU frequency scaling is not supported by your processor.
Feb 29 17:05:35 floratest rcpowersaved: enter ‘CPUFREQD_MODULE=off’ in /etc/sysconfig/powersave/cpufreq to avoid this warning.
Feb 29 17:05:36 floratest rcpowersaved: Cannot load cpufreq governors – No cpufreq driver available
Feb 29 17:05:36 floratest [powersave]: ERROR (CPUFreq_Userspace:42) Could not set userspace governor, seems as if the cpufreq_userspace module is not loaded.
Feb 29 17:05:36 floratest [powersave]: ERROR (read_line:43) Could not open file for reading: ‘/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies’
Feb 29 17:05:36 floratest [powersave]: ERROR (read_line:43) Could not open file for reading: ‘/sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq’
Feb 29 17:05:36 floratest [powersave]: ERROR (read_value:82) Could not read value in file /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_freq: error: No such file or directory!
Feb 29 17:05:36 floratest [powersave]: ERROR (read_line:43) Could not open file for reading: ‘/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq’
Feb 29 17:05:36 floratest [powersave]: ERROR (read_value:82) Could not read value in file /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: error: No such file or directory!
Feb 29 17:05:36 floratest [powersave]: WARNING (getMinMaxSpeeds:349) Speedstepping not supported! Was the correct cpufreq module loaded?
Feb 29 17:05:36 floratest [powersave]: WARNING (initFreqsViaTesting:377) Could not read min and max speed
Feb 29 17:05:36 floratest [powersave]: ERROR (PM_Interface:231) Cannot create cpufreq objects
These errors were also reported in a reboot that occurred last night.
This is a link to a post of someone experiencing similar problems, but no solution was posted:
http://groups.google.com/group/alt.os.linux.suse/msg/50d790f2caf4edca