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Old 05-18-2020, 09:56 AM   #1
rob777
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Default How to give reaper permission for zero latency

hi Everybody,
I'm on a Debian based OS (Xubuntu) and for maximum performance reaper needs permission to write on /dev/cpu_dma_latency. This message appears on terminal everytime I start reaper :

/dev/cpu_dma_latency: permission denied

I can I give reaper such permission ?
Thanks
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Old 05-18-2020, 01:52 PM   #2
JamesPeters
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I use Xubuntu 20.04 and I don't have that error message.
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Old 05-19-2020, 12:46 AM   #3
Tobbe
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Check: Options/Preferences/Audio/Device and "Disable power management...." is that ticked? Untick it and apply, restart.

And if you wanna try it on you need to do this in terminal:
sudo chown your_user_name /dev/cpu_dma_latency (if you dare )
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Last edited by Tobbe; 05-19-2020 at 12:53 AM.
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Old 05-19-2020, 02:08 AM   #4
rob777
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Quote:
Originally Posted by JamesPeters View Post
I use Xubuntu 20.04 and I don't have that error message.
Are you running it with sudo permissions ?

@Tobbe:
I'm visualizing that message because "disable power management" is ticked.
Thank you! chown solved the problem! Now I get "/dev/cpu_dma_latency: set to 0"

Thanks to all!
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Old 05-19-2020, 05:27 AM   #5
JamesPeters
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No, I am running as a user.

I have changed my power management settings for the distro, so I don't need Reaper to change anything.
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