Since updating to 7.4.36 my systems stop computing after about 5min. This is across all machines and doesn't seem to be affected by any screen savers or manager preferences. I downgraded back to 7.2.42 and the problem went away. I haven't been able to find this particular issue in the forums so any help would be appreciated.

Phteven (Steven with a "ph")

Please post your global_prefs.xml file contents located in your data directory.

<global_preferences>
<source_project>http://milkyway.cs.rpi.edu/milkyway/</source_project>
<source_scheduler>http://milkyway.cs.rpi.edu/milkyway_cgi/cgi</source_scheduler>

<mod_time>1421944566</mod_time>
<cpu_scheduling_period_minutes>120</cpu_scheduling_period_minutes>
<run_if_user_active>0</run_if_user_active>
<idle_time_to_run>3</idle_time_to_run>
<run_gpu_if_user_active>0</run_gpu_if_user_active>
<run_on_batteries>0</run_on_batteries>
<suspend_if_no_recent_input>5</suspend_if_no_recent_input>
<suspend_cpu_usage>0</suspend_cpu_usage>
<cpu_usage_limit>100</cpu_usage_limit>
<max_cpus>16</max_cpus>
<max_ncpus_pct>100</max_ncpus_pct>
<disk_max_used_gb>0</disk_max_used_gb>
<disk_max_used_pct>50</disk_max_used_pct>
<disk_min_free_gb>0.5</disk_min_free_gb>
<disk_interval>60</disk_interval>
<ram_max_used_busy_pct>75</ram_max_used_busy_pct>
<ram_max_used_idle_pct>90</ram_max_used_idle_pct>
<vm_max_used_pct>75</vm_max_used_pct>
<leave_apps_in_memory>0</leave_apps_in_memory>
<work_buf_min_days>0.1</work_buf_min_days>
<work_buf_additional_days>0</work_buf_additional_days>
<confirm_before_connecting>0</confirm_before_connecting>
<hangup_if_dialed>0</hangup_if_dialed>
<max_bytes_sec_down>0</max_bytes_sec_down>
<max_bytes_sec_up>0</max_bytes_sec_up>
<dont_verify_images>0</dont_verify_images>
<start_hour>0</start_hour>
<end_hour>0</end_hour>
<net_start_hour>0</net_start_hour>
<net_end_hour>0</net_end_hour>
<daily_xfer_limit_mb>0</daily_xfer_limit_mb>
<daily_xfer_period_days>0</daily_xfer_period_days>
</global_preferences>

<global_preferences>
<source_project>http://milkyway.cs.rpi.edu/milkyway/</source_project>
<source_scheduler>http://milkyway.cs.rpi.edu/milkyway_cgi/cgi</source_scheduler>

<mod_time>1421944566</mod_time>
<cpu_scheduling_period_minutes>120</cpu_scheduling_period_minutes>
<run_if_user_active>0</run_if_user_active>
<idle_time_to_run>3</idle_time_to_run>
<run_gpu_if_user_active>0</run_gpu_if_user_active>
<run_on_batteries>0</run_on_batteries>
<suspend_if_no_recent_input>5</suspend_if_no_recent_input>
<suspend_cpu_usage>0</suspend_cpu_usage>
<cpu_usage_limit>100</cpu_usage_limit>
<max_cpus>16</max_cpus>
<max_ncpus_pct>100</max_ncpus_pct>
<disk_max_used_gb>0</disk_max_used_gb>
<disk_max_used_pct>50</disk_max_used_pct>
<disk_min_free_gb>0.5</disk_min_free_gb>
<disk_interval>60</disk_interval>
<ram_max_used_busy_pct>75</ram_max_used_busy_pct>
<ram_max_used_idle_pct>90</ram_max_used_idle_pct>
<vm_max_used_pct>75</vm_max_used_pct>
<leave_apps_in_memory>0</leave_apps_in_memory>
<work_buf_min_days>0.1</work_buf_min_days>
<work_buf_additional_days>0</work_buf_additional_days>
<confirm_before_connecting>0</confirm_before_connecting>
<hangup_if_dialed>0</hangup_if_dialed>
<max_bytes_sec_down>0</max_bytes_sec_down>
<max_bytes_sec_up>0</max_bytes_sec_up>
<dont_verify_images>0</dont_verify_images>
<start_hour>0</start_hour>
<end_hour>0</end_hour>
<net_start_hour>0</net_start_hour>
<net_end_hour>0</net_end_hour>
<daily_xfer_limit_mb>0</daily_xfer_limit_mb>
<daily_xfer_period_days>0</daily_xfer_period_days>
</global_preferences>

It looks like you are using the Default profile you set at the Milkyway project, so just go to Milkyway project and click Computing preferences under your account. Click Edit preferences and change the following entry:
Suspend work if no mouse/keyboard activity in last from 5 to a blank box and click Update preferences, then update the project in BOINC Manager.

Thank You, I saw that preference after I posted the file, it seems to work now.