Re: Nvidia refresh rate.
On 02/08/2022 09:53, GianPiero Puccioni wrote:
On 01/08/2022 21:26, John Pilkington wrote:
> On 31/07/2022 13:07, GianPiero Puccioni wrote:
>> Hi,
>>
>> I want to decrease the refrash rate of the video to use less battery
>> but I am
>> having difficulties...
>>
>> I have F35 with KDE on a Dell G15 with Nvidia GA107M [GeForce RTX
>> 3050 Ti
>> Mobile], the RPMFusion drivers and a 1920x1080 resolution (native).
>>
>> In the "system settings-display" There is the possibility to change
>> refresh from
>> 120Hz to 60Hz but it doesn't stick; I change it and "apply" but if
I
>> change
>> screen and go back to "display" it's again at 120Hz, I tried
>> "nvidia-settings"
>> but it has only info, not settings.
>> The program "xrandr" reports
>> 1920x1080 120.00*+ 59.97 59.96 59.93
>>
>> Is this the problem 59.97 not 60?
>>
>> Any suggestions?
>>
>> G
>
> Resending to list:
>
> I think I may have seen something like this in the past, with the gui
> reporting a possible refresh rate as an integer but not reinterpreting
> that as the appropriate floating point value when trying to use it as
> a setting.
>
> Have you tried setting with xrandr?
>
> xrandr --output <output> --rate 59.97
>
> looks as if it might help, if I knew what to put as <output>
>
> And the archlinux xrandr wiki looks as if it could be useful.
>
As xrandr reports
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis
y axis) 1920x1080 120.00*+ 59.97 59.96 59.93
I used "xrandr --output eDP-1 --mode 1920x1080 -r 59.97"
the answer, after a couple of second of black screen(scary!)
xrandr: Configure crtc 0 failed
I did it as root but maybe I need some kind of permission?
G
I suppose it might be worth trying the other values given by xrandr.
nVidia used to allocate whole-number labels to non-integer frame rates,
but that was years ago and much has changed since then. This ref was
authoritative at the time, in a TV context, and might perhaps suggest
something:
https://www.mythtv.org/wiki/User_Manual:JudderFree
I don't know if you are using Wayland or X11, and what difference that
might make. This is probably the official nVidia reference document for
your driver, and most of it will apply to the rpmfusion build. It's not
easy reading and I haven't seen an obvious fix for your problem.
http://us.download.nvidia.com/XFree86/Linux-x86_64/515.57/README/wayland-...
John