Newbies • Re: Power Management

Hmm, can you check that the permissions are correct on /dev/cpu_dma_latency? On my machine:

$ ls -laF /dev/cpu_dma_latency crw-rw---- 1 root audio 10, 123 Jun 16 00:08 /dev/cpu_dma_latency

And to confirm that I belong to the audio group:

$ for x in $(groups); do [ "$x" == "audio" ] && echo $x; doneaudio

From the writeup for the option:

In order for this to work the device node has to be kept open with the registered value, simply writing a value to it will not work. DAW's like Ardour and Reaper offer the possibility to control the CPU latency and if you want to take advantage of this you will want your user to be able to write to this device node.

So, if you aren't running a DAW like Ardour / Reaper (or checking via the rtcqs script) you won't be able to tell that the option is working.

Statistics: Posted by tseaver — Sun Jun 16, 2024 4:35 am