![]() What to do when you can't look at the hardware For your desktop PC it may be on the back or you might have to open it up and look inside: For my old laptop it is as easy as looking at the power brick. By law in most countries this label must exist. The old tried and true method is to look at the safety label on your power supply. Man pwrstatd # to learn about background daemon with alarms, auto shutdown, etc. To learn more about using pwrstat use: man pwrstat # to learn more about the terminal interface deb) which Ubuntu is based on.Īfter downloading install it using: sudo dpkg -i powerpanel_132_b You will find 32-bit and 64-bit downloads available for all Linux distro's but make sure you select the one for Debian (. To install pwrstat go to the Cyber Power Systems website Linux Software page. The current load is 72 Watts and the maximum load is 330 watts. Although you don't have this type of power supply the communication concept would be similar: $ sudo pwrstat -statusįirmware Number. On my laptop there is a USB 3 self powered hub connected to the UPS (Interruptible Power Supply). This may include model, or simply be generic for an entire class of different power supplies.Īs mentioned in the top voted answer a special communication channel to the Power Supply is required. To check if the PSU in question provides this, run lsusb and look for something that resembles a power supply. What data they will provide will differ from power supply to power supply. Other power supplies may include a monitoring interface over USB. But in this case, you should specify which system you have - as this is typically not seen in normal PC's. For instance it's quite common that they will report power consumption, fan speed and temperature. Such sensors should show up in lmsensors. Some server systems come with sensors in the power supply. The operating system simply has no way of knowing anything about the power supply. The rest of the pins are used for voltages, or simple binary signals, like PS_ON and PWR_OK. The plug between the power supply and the mainboard follows the ATX specification, which regulates which signals and which voltages shall be present.Ĭom is common, or ground.
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