Which command to force a drive to spin up?
dd’s direct flag ought to bypass the (host) cache, and force I/O to be sent to the drive: dd if=/dev/sda bs=4096 count=1 of=/dev/null … Read more
power-management
What is “Link State Power Management”?
Link state power management: PCI Express needs a continuous stream of data from the PCI Express device to the computer to keep them … Read more
How do I immediately put a drive to sleep (without changing its power setting configuration)?
How do I immediately put a drive to sleep (without changing its power setting configuration)?
Does my 1000 watt 80gold+ (90% efficient) PSU pull 1111 watts, 1000 watts, or 900 watts from my wall receptacle at 100% load?
The efficiency is an extremely complex topic, and in very simple terms Wil’s answer is correct, but… The test specifies following parameters: 87% … Read more
Change power plan when laptop gets plugged in
Each power plan has settings for “on battery” and “plugged in” it will switch between the two automatically you don’t need to create … Read more
Disable USB power for USB controlled power strip
# To enforce suspend immediately when device is unused: echo -n “0” >$DEV_POWER_PATH”/power/autosuspend_delay_ms” echo -n “auto” >$DEV_POWER_PATH”/power/control” # Make the device was not … Read more
USB Suspend: USB Device not Entering Selective Suspend
First question to answer, is it the hub, or something downstream? It appears to me this is an external hub, so you can … Read more
Switch off display and Lock screen in Xfce power manager when laptop lid is closed?
I’m not on my laptop at the moment, but check to be sure that Power Manager –> Battery (and AC) –> Monitor –> … Read more
Display sleep: “sleep” graphics card?
Display sleep: “sleep” graphics card?
a lot of time spent in intel_idle
a lot of time spent in intel_idle
