https://community.hpe.com/t5/operating-system-linux/problem-with-ups/m-p/4069868#M30032 Thanks Peter for trying help but my problem was resolved by unplugged electric suplly cables from server, waiting for some seconds, plugging again ... and "voila" my server found UPS through Power Manager 4.1. Wed, 26 Sep 2007 13:09:34 GMT cuppy 2007-09-26T13:09:34Z https://community.hpe.com/t5/operating-system-linux/problem-with-ups/m-p/4069866#M30030 I have HP DL server and HP Rack UPS 3000. Installing PowerManager 4.1 on server under RedHat5 I always get error of not finding any device though UPS is connected to serial port. And it's strange 'cause at my first installation of PowerManager 4.0, this UPS was found by this server, then i decided to reinstall new version 4.1 and failed. Now UPS can't find by either PowerManager 4.0 nor PowerManager 4.1. Any ideas? <BR />PS. CLI in iLO2 bios is disabled. Thu, 13 Sep 2007 02:42:59 GMT https://community.hpe.com/t5/operating-system-linux/problem-with-ups/m-p/4069866#M30030 cuppy 2007-09-13T02:42:59Z https://community.hpe.com/t5/operating-system-linux/problem-with-ups/m-p/4069867#M30031 Maybe I'm mistaken but the versions of Power Manager that you are using are not supported under RHEL5.<BR /><BR /> Wed, 26 Sep 2007 08:28:58 GMT https://community.hpe.com/t5/operating-system-linux/problem-with-ups/m-p/4069867#M30031 Peter_505 2007-09-26T08:28:58Z https://community.hpe.com/t5/operating-system-linux/problem-with-ups/m-p/4069868#M30032 Thanks Peter for trying help but my problem was resolved by unplugged electric suplly cables from server, waiting for some seconds, plugging again ... and "voila" my server found UPS through Power Manager 4.1. Wed, 26 Sep 2007 13:09:34 GMT https://community.hpe.com/t5/operating-system-linux/problem-with-ups/m-p/4069868#M30032 cuppy 2007-09-26T13:09:34Z