Linux mint refresh rate

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[AMD] Set refresh rate to 144 Hz or 75 Hz

[AMD] Set refresh rate to 144 Hz or 75 Hz

Post by GEBO » Sun Mar 22, 2020 7:18 pm

I’ve been using Linux Mint for several years now, mostly for desktop and games. Recently a friend of mine gave me a monitor an Iiyama PL2730H.
I want to use a better refresh rate than now (60 Hz). According to their website it should be doable.

Here are my infos :

I’ve found many ways to do it with Nvidia GPU but not with AMD. Do you know how I can do it. Also, it looks like I can’t use 144Hz on the monitor, do you know why ?

Re: [AMD] Set refresh rate to 144 Hz or 75 Hz

Post by roblm » Tue Mar 24, 2020 10:32 am

After doing a search for the monitor’s specifications, it appears that only a refresh rate up to 75 Hz is supported. I found no info on the iiyama website and very little elsewhere.

Use this command and post the output: xrandr —verbose

Re: [AMD] Set refresh rate to 144 Hz or 75 Hz

Post by Turtletronic » Tue Mar 24, 2020 12:02 pm

Maximum 75 Hz and that only with DisplayPort or HDMI cable. Why? Certain components of that display do not allow higher frequencies; the producer says that 75 Hz is max (see G2730H tech specs).

It’s not like you are trying to overclock a CPU (which can take higher cycles but was downgraded for ‘reasons’).
Displays do not have a built-in safety fallback for nothing.

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Delightly Linux

How to Set the Default Monitor Refresh Rate

📅 September 15, 2017
“How can I make Linux Mint default to 100Hz for my fancy ultrawide monitor?”

If you are using a high-end monitor with Linux, such as the Acer Predator X34, that supports refresh rates higher than 60Hz, then you have probably noticed that Linux Mint defaults to a high refresh rate (100Hz if overclocked) at the login screen, but returns to a lower refresh rate (50Hz or 60Hz) after showing the desktop.

Sure, you can change the refresh rate to 100Hz manually using the Nvidia control panel, but this is a minor inconvenience that must be performed upon each boot.

“Is there a way to make the change persistent across reboots so I can always startup with, say, 80Hz?”

Yes. This article shows how to set a default refresh rate in Linux Mint 18.2 with the proprietary Nvidia drivers installed. The change is persistent across reboots. While this article uses the Acer Predator X34 overclocked to 100Hz, the same method should apply to any other monitor if using Nvidia drivers.

The Beginning

This article is based around an Nvidia-based graphics card with the Nvidia proprietary driver installed (version 384.69 as of the time of this writing). nvidia-settings is also installed.

For the Predator X34, it has been overclocked to 100Hz from the monitor’s menu, so it will support any refresh rate up to 100Hz. The monitor is connected to an Nvidia graphics card via the DisplayPort.

Step 1. Open nvidia-settings as root

This opens the NVIDIA X Server Settings.

Select X Server Display Configuration from the left menu so the Layout panel appears as shown.

X Server Display Configuration allows you to change the resolution and refresh rate.

Look at the Resolution field. It will probably be set to Auto. We need to change this to a manual resolution. Change the resolution here at your desired resolution. In this case, it is 3440×1440 for the Predator X34.

To the right of the resolution setting is the refresh rate. Change this rate to the refresh rate you want. In this case, 80Hz was chosen because that rate removes the dreaded scanline effect that the X34 exhibits at lower resolutions. Higher rates, such as 100Hz will also work. The setting you choose will be the refresh rate used after you log in to the desktop.

You can click Apply now to test and change the rate.

Step 2. Save to xorg.conf

While still at the same panel, click Save to X Configuration File. We need to save the changes made here to xorg.conf located at /etc/X11/xorg.conf. Since this is a system-level file, we need root permission to access it, which is why we opened nvidia-settings as root earlier. If not, you will be prompted for the root password.

Go ahead an overwrite xorg.conf. If there is anything you need to preserve or if you are concerned that you might make errors leading to a terminal boot, then make a backup copy of xorg.conf first.

After xorg.conf is updated, you might need to make further edits for other hardware in xorg.conf. For example, if you are using an M.M.O.7 mouse, then you must add the proper InputClass to avoid the unresponsive button issue that still plagues this mouse when used with Linux. Be sure to remove the default mouse entries from xorg.conf.

xorg.conf

If you look at xorg.conf, the line that changes the default resolution is located within Section “Screen”

The 3440x1440_80 sets the refresh rate to 80Hz. You could change this to other rates, such as 3440x1440_100 for 100Hz. If you only need to change the refresh rate, you could edit this line manually in order to avoid making additional changes to xorg.conf for custom hardware like the M.M.O.7. Otherwise, it is probably best to use nvidia-settings to alter xorg.conf.

Step 2. Change the Display Settings

Open the Linux Mint System Settings and select Display. The Display dialog appears.

Display dialog in Linux Mint System Settings.

Check that the resolution is set to match the xorg.conf/nvidia-settings resolution made in step 1. In this case, it is 3440×1440. Click Apply.

For some unknown reason, the refresh rate would not persistent between reboots until applied from the Display dialog. This seems to affect another display setting elsewhere. For my system, editing xorg.conf was not enough. I also had to apply the resolution from Display as described.

Now, Linux Mint 18.2 should automatically set the refresh rate to 80Hz (or whatever refresh rate was chosen) between reboots. There is no longer any need to manually change the refresh rate upon each boot.

If you need to adjust the refresh rate to something else, follow these steps again.

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Cinnamon display refresh rate setting?

Cinnamon display refresh rate setting?

Post by perdomot » Sun Apr 12, 2020 8:18 pm

Re: Cinnamon display refresh rate setting?

Post by AZgl1500 » Mon Apr 13, 2020 12:15 am

I never tried, on this particular laptop and 19.3 Cinnamon, there isn’t any noticable flicker at all.

It also has NVIDIA graphics.

I don’t see any way to change the refresh rate

I don’t «refresh» in this list

Re: Cinnamon display refresh rate setting?

Post by powerwagon75 » Mon Apr 13, 2020 12:46 am

In Nvidia-settings, click on X Server Display Configuration, and you see it similar to below. Click on the monitor you want to adjust in the Layout section, then on the line «Resolution:», if the second dropdown box says Auto, click on it, and your available choices will be listed.

You’ll have to save it with the «Save to X Configuration FIle» button, which will create /etc/X11/xorg.conf file, or it will edit it, to add your chosen setting if it already exists.

Re: Cinnamon display refresh rate setting?

Post by perdomot » Mon Apr 13, 2020 12:53 am

In Nvidia-settings, click on X Server Display Configuration, and you see it similar to below. Click on the monitor you want to adjust in the Layout section, then on the line «Resolution:», if the second dropdown box says Auto, click on it, and your available choices will be listed.

You’ll have to save it with the «Save to X Configuration FIle» button, which will create /etc/X11/xorg.conf file, or it will edit it, to add your chosen setting if it already exists.

Re: Cinnamon display refresh rate setting?

Post by powerwagon75 » Mon Apr 13, 2020 1:09 am

Re: Cinnamon display refresh rate setting?

Post by perdomot » Mon Apr 13, 2020 2:26 pm

Re: Cinnamon display refresh rate setting?

Post by perdomot » Mon Apr 13, 2020 3:16 pm

Re: Cinnamon display refresh rate setting?

Post by AZgl1500 » Mon Apr 13, 2020 5:00 pm

I’m not seeing your problem on this laptop with 19.3 Cinnamon.

Re: Cinnamon display refresh rate setting?

Post by powerwagon75 » Mon Apr 13, 2020 10:31 pm

Did you verify the /etc/X11/xorg.conf had your changes? Typically saves it to the «Screen» section and as a «option metamodes» line.

Should be a line in that file that appears similar to this:
Option «metamodes» «DVI-I-1: 1440×900 +2072+0, HDMI-0: 3840×2160 +3512+0, DP-0: 1920×1080 +0+0»
—but, has you defined refresh rate after the width/height numbers.

If Nvidia offered you 60Hz, it should honor that value when saving the file. You can search it, and find lots of anecdotal stories about people exclaiming they needed to open Nvidia-Settings as root to get settings to save. I’ve never experienced that issue myself, always saves correctly (it will ask if you want to overwrite or Merge with the xorg.conf file.) As far as I know it needs to save to that file. don’t give it another name/location to save to.

Re: Cinnamon display refresh rate setting?

Post by perdomot » Tue Apr 14, 2020 11:25 pm

Re: Cinnamon display refresh rate setting?

Post by powerwagon75 » Wed Apr 15, 2020 12:11 am

You have to go to the Xserver Display Configuration page where you changed the refresh rate to 60Hz.

Then, (presuming you’ve already selected 60Hz, and clicked «Apply»), at the bottom right of that page, you have to click on «Save to X Configuration FIle.»

A small dialogue box will pop up. If you have an existing /etc/X11/xorg.conf file, it will show the name of the file, and then make sure the «X» is checked in the » Merge with existing file» box, and save it. You should get another pop-up box asking for your password to save it to file.

Just changed my DP-0 from Auto to 60Hz (1920x1080_60) and saved, as shown below:
Option «metamodes» «DP-0: 1920x1080_60 +0+0, DVI-I-1: 1440×900 +1920+180

After you’ve confirmed it has saved it to the xorg.conf with the refresh rate included, then restart the computer once and see if it helps.

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Open terminal, and run glxgears . You should see some colorful gears turning in a small box, and terminal will start returning data, where the frame rate should very closely match your refresh rate.

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How to change refresh rate in cinnamon?

How to change refresh rate in cinnamon?

Post by dcibel » Wed Dec 09, 2015 12:13 am

Hi all,
I am trying to set the refresh rate in cinnamon. I found the display section of the settings, however the only options available here are resolution and rotation. I think its a bit silly not to find refresh rate here.

I have to manually open the AMD control panel to set my monitor to 144Hz, however it doesn’t stick. When I log off and on again, the refresh rate is back at 60Hz. Does anyone know how to make it stick in Cinnamon? I have been using XFCE for years and had not any issue here with the refresh rate. I thought I’d give cinnamon a shot, and I rather like it so far however with some quirks, this is a big one for me.

Re: How to change refresh rate in cinnamon?

Post by Pjotr » Wed Dec 09, 2015 5:44 am

Re: How to change refresh rate in cinnamon?

Post by dcibel » Wed Dec 09, 2015 2:03 pm

Thanks for your reply.

I have run «sudo amdcccle», in fact the amd control panel needs to be run under root in order to change the refresh and resolution, otherwise they are greyed out. Weird, I know.

However, this does not survive a log out and log in. The log in screen does operate at 144Hz, however once I log in it is set back to 60Hz, I have to change it manually every time. There is some underlying setting within cinnamon causing this, I am certain.

Re: How to change refresh rate in cinnamon?

Post by texbrew » Wed Dec 09, 2015 3:26 pm

dcibel wrote: Thanks for your reply.

I have run «sudo amdcccle», in fact the amd control panel needs to be run under root in order to change the refresh and resolution, otherwise they are greyed out. Weird, I know.

However, this does not survive a log out and log in. The log in screen does operate at 144Hz, however once I log in it is set back to 60Hz, I have to change it manually every time. There is some underlying setting within cinnamon causing this, I am certain.

While I am not at all familiar with the issue of changing refresh rate, it reminds me of an irritating problem I had with a laptop being unable to remember screen brightness settings after a reboot. After scouring the web (well, 5 minutes of searching) I found a tip for adding a line to the file /etc/rc.local which by default, does nothing.

Before you change rc.local I recommend copying the original file. I just give the new copy an extension like «rc.local.bak» for «backup». This way, if I break something, it’s easy to recover the original file.

So here’s a look at my edited rc.local for that screen brightness setting:

That single line, echo 7 > /sys/class/backlight/acpi_video0/brightness fixed the screen brightness thing for me. And it was only needed on a particular machine. Another laptop running the same OS had no problem remembering brightness settings.

A little tinkering with rc.local and refresh rate settings — on your part — may be the way to make your Mint machine behave the way you want it to.

It may be helpful to include the link to the page where I found the tip for screen brightness. Though at first glance, it doesn’t appear to have anything to with screen brightness, it’s there. «StartPage» was my friend.

scroll down the page to find how to change default screen brightness on a laptop.

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