[260.19.12 regression] Clock changes don't work

[yeknom82]

I'll probably start a separate thread for it and post the debug log and what not when i get home....no need to hijack this thread for a separate issue.

[artem]

zander,

thank you again!

[artem]

This bug is not resolved in 260.19.21.

Who has forgotten to push the changes?

[NvFuchs]

Originally Posted by artem

This bug is not resolved in 260.19.21.

Who has forgotten to push the changes?

Originally Posted by zander

FWIW, I debugged and fixed the NV-CONTROL overclocking interface regressions today. They should be fixed in a future 260.19.xx driver release (though likely not the next one).

emphasis added.

Fuchs

[zander]

Right, I didn't expect this to be fixed in 260.19.21. I'll update this bug when a BETA candidate with the fixes has been built. I can't promise anything, but I hope that this will happen in the next week or two (there are a few other fixes that need to be picked up).

[artem]

I'm sorry for being inattentive, NvFuchs.

Thanks for letting us know, zander!

[artem]

This problem is semi-fixed in 260.19.26 beta drivers, see the next messages.

[drhirsch]

Unfortunately, not completely fixed.

This was done on a 8800GS with 575 MHz default core clock.

Downclocking for 2D is ok:

# nvclock -n 300
Requested core clock:           300.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GS
Memory clock:   300.000 MHz
GPU clock:      300.000 MHz

Overclocking more than 25% does not work:

# nvclock -n 376
Requested core clock:           376.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GS
Memory clock:   300.000 MHz
GPU clock:      300.000 MHz

But exactly 25% seems ok:

# nvclock -n 375
Requested core clock:           375.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GS
Memory clock:   300.000 MHz
GPU clock:      375.000 MHz

Again, more than 25%:

# nvclock -n 469
Requested core clock:           375.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GS
Memory clock:   300.000 MHz
GPU clock:      375.000 MHz

# nvclock -n 468
Requested core clock:           375.000 MHz

Adjusted Coolbits 2D/3D clocks on a nVidia Geforce 8800GS
Memory clock:   300.000 MHz
GPU clock:      468.000 MHz

Rinse and repeat until you are at the desired clock.
Using nvidia-settings yields exactly the same result.

[artem]

So, actually, clock changes work, but a bit incorrectly and inconsistently.

[artem]

This issue is not fully resolved in the latest beta drivers (260.19.26):

While you can easily downclock you RAM/GPU clocks, NVIDIA driver will only allow to increase GPU clocks by ~25% increments, so jumping from 200MHz back to 650MHz is not possible without some chore (200->220->250->300->...->650).

So I have to agree with drhirsch that these beta drivers haven't fully fixed the issue.

[hgkabde]

Instead with little steps back to the full power of your card you can use this:

nvidia-settings -a GPUOverclockingState=0

This disable OC and the card is running with factory settings.

[artem]

Originally Posted by hgkabde

Instead with little steps back to the full power of your card you can use this:

nvidia-settings -a GPUOverclockingState=0

This disable OC and the card is running with factory settings.

This command worked perfectly, thank you.