could not open /dev/port; try sudo?

[crblackw]

I get the following error message when running sudo ./target/release/msi-rgb 00000000 FFFFFFFF 00000000 # for green on Ubuntu 19.04 with a B450 TOMAHAWK. Has anyone else experienced this?

error: could not open /dev/port; try sudo?
    caused by: Operation not permitted (os error 1)

[aliengrey80]

i got same problem error: could not open /dev/port; try sudo? caused by: Operation not permitted (os error 1

[nagisa]

This may be caused by some sort of sandboxing mechanism enabled on your installation.

[aliengrey80]

Thanks for fast reply. I accually did some experiments with firejail but i thought i completely removed it.

This may be caused by some sort of sandboxing mechanism enabled on your installation.

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[bzoracler]

Same issue here - cloned and built msi-rgb immediately after a fresh install of Ubuntu 20.04. I had to enable secure boot for LivePatch, would that have affected it?

[loveisfoss]

It used to work for me when I was using the "legacy bios" mode on my desktop. It is though not working after that I switched to a new installation with UEFI + Secure boot enabled. I get:

error: could not open /dev/port; try sudo?
caused by: Permission denied (os error 1)

I don't know if it would work with UEFI but without Secure Boot. I am probably going to come back and report if I try it.