"gpu-vddc" does not seem to work

[gotqn]

First of all, I have not been able to find how to use this parameter in the documentation. We should have information about what it is doing and how should be setup.

Then, I try to change it on live, but the values that I have set up in the terminal do not seem to change anything:

Again the old value is displayed.

I try to set up the parameter in the conf file I am using like it is displayed on the screenshot below but the sgminer is still displaying the old values:

Could you advice?

I am using Ubuntu 12.04.02 with AMD Catalyst 13.12 and R9 280X GPUs

[gotqn]

Any updates here? Could you confirm it is really not working and could I assist with something else?

[vorodev]

(Some) GPUs don't allow changing voltage on linux. Maybe it's because the
drivers don't support it. I'll bet this is not a sgminer problem.

2014-03-04 21:10 GMT+01:00 gotqn notifications@github.com:

Any updates here? Could you confirm it is really not working and could I
assist with something else?

Reply to this email directly or view it on GitHubhttps://github.com/veox/sgminer/issues/125#issuecomment-36668219
.

[gdevenyi]

More likely this is a voltage-locked bios. sgminer tries to adjust voltages via the ADL interface which goes through the video bios, if the manufacturer locks voltage, you cannot change it.

In windows there are many third party programs which (dangerously) poke the I/O ports of the voltage regulartors directly, bypassing the bios, I'm not aware of any such programs in linux.

[mrbrdo]

Most GPUs have proprietary software that uses custom I2C communication to change the voltages.
Someone could reverse-engineer the protocol and create a program to change the voltages on Linux. If that happens (especially for the more popular GPUs) we will add support for such software into sgminer, but sgminer itself will not support this directly.

Also, see #72

Closing as wontfix.