Comme=
nt # 82
on bug 10264=
6
from kyrottimus@=
;yahoo.com
My solution, well more of a workaround and since I had this pr=
oblem even with
default MESA that comes packaged with Kernel 5.05.XX, was to retune my moni=
tor
to my GPU instead of letting my GPU try to do it automatically the other way
around or waiting on updated kernel/drivers/firmware/microcode to address t=
his
problem for me.
TL:DR--using xrandr to tell my monitor to stay in step with my GPU.
This fixed it for me, your mileage may vary:
Below is an example of commands in the terminal to activate a new monitor
refresh rate in the "display" settings in Manjaro Linux to tune y=
our monitor to
a precise frequency: in the case of a Radeon (Polaris) RX580 or RX590 and a
75Hz (max) ASUS VG245H HDMI gaming monitor, my target was 73Hz (~-2Hz from
peak) to run with the GPU properly without any horizontal black/green line
flickering.
I chose 73Hz because I already tried tuning to my monitor's closest accurate
refresh rate (74.89Hz) manually off the reported 75Hz and it still flickere=
d,
and the next closest setting for my Monitor was ~73Hz.
Keep in mind, with the below example, your variables need to be pulled from
both the cvt command at the top (with your desired resolution/refresh rate
plugged in after the cvt command) and then plug that "Modeline" p=
art (after the
word Modeline) into the xrandr --newmode command.=20=20
YOUR COMMANDS WILL PROBABLY NEED DIFFERENT VARIABLES.
Then, using xrandr -q find your display type and ID (for me it was HDMI-A-0)
and plug that into your final command along with your desired
resolution/refresh info: example here of=20
$ xrandr --verbose --addmode HDMI-A-0 "1920x1080_73.00"
*******BEGIN TERMINAL EXAMPLE********
[username@thisalinuxpc ~]$ cvt 1920 1080 73
# 1920x1080 72.87 Hz (CVT) hsync: 82.27 kHz; pclk: 213.25 MHz
Modeline "1920x1080_73.00" 213.25 1920 2056 2256 2592 1080 108=
3 1088 1129
-hsync +vsync
[username@thisalinuxpc ~]$ xrandr --newmode "1920x1080_73.00"=
213.25 1920
2056 2256 2592 1080 1083 1088 1129 -hsync +vsync
[username@thisalinuxpc ~]$ xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
HDMI-A-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis)
531mm x 299mm
1920x1080 60.00*+ 74.99 50.00 59.94=20=20
1600x1200 60.00=20=20
1680x1050 59.88=20=20
1280x1024 75.02 60.02=20=20
1440x900 59.90=20=20
1280x960 60.00=20=20
1366x768 59.79=20=20
1280x800 60.00=20=20
1152x864 75.00=20=20
1280x720 60.00 50.00 59.94=20=20
1024x768 75.03 70.07 60.00=20=20
832x624 74.55=20=20
800x600 72.19 75.00 60.32 56.25=20=20
720x576 50.00=20=20
720x480 60.00 59.94=20=20
640x480 75.00 72.81 66.67 60.00 59.94=20=20
720x400 70.08=20=20
HDMI-A-1 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
1920x1080_73.00 (0x6f2) 213.250MHz -HSync +VSync
h: width 1920 start 2056 end 2256 total 2592 skew 0 clock 82.2=
7KHz
v: height 1080 start 1083 end 1088 total 1129 clock 72.8=
7Hz
[username@thisalinuxpc ~]$ xrandr --verbose --addmode HDMI-A-0 1920x108=
0_73.00
[username@thisalinuxpc ~]$ xrandr --output HDMI-A-0 --mode 1920x1080_73=
.00
*******END TERMINAL EXAMPLE*********
Doing the above commands, 72.9Hz then showed up in the "display" =
options (in
panel menu) and selecting it works great with zero flicker.
Now to make it stick after reboot/relog (if it works to your liking):
Make a script file called "custom_refresh" (without quotes, no .s=
h)...put the
following in it (change yours to fit your proper command outputs from above,
accordingly):
#!/bin/sh
xrandr --newmode "1920x1080_73.00" 213.25 1920 2056 2256 2592 =
1080 1083 1088
1129 -hsync +vsync
xrandr --verbose --addmode HDMI-A-0 1920x1080_73.00
xrandr --output HDMI-A-0 --mode 1920x1080_73.00
#[end of commands-don't include this line]
Save this file to your /home/CHANGEMETOYOURUSERNAME/ dir (change
CHANGEMETOYOURUSERNAME to your user name), quit, then make a new file called
"trigger_custom_refresh.sh" (no quotes) and put this in it:
#!/bin/sh
cd /usr/bin/
xfce4-terminal -e 'bash -c "/home/CHANGEMETOYOURUSERNAME/custom_refres=
h"'
#[end of commands-don't include this line]
(or use whatever your favorite terminal emulator is instead, does not have =
to
be xfce4-terminal; don't forget to change the CHANGEMETOYOURUSERNAME to
whatever your user name is, or whatever directory where you saved your
custom_refresh script is properly reflected in the command)
Save, quit. Cd to where this file is (I just stick both these files in my
/home/ dir and run this command straight from a raw terminal) and in termin=
al
make it executable:
$ chmod +x ./trigger_custom_refresh.sh
To test it, reboot first (to clear the initial xrandr settings out and go b=
ack
to default), then use this command:
$ ./trigger_custom_refresh.sh
Your monitor should flicker as it restarts under the new refresh rate. If =
it
worked (you can check either by looking at the monitor display settings or =
look
at xfce4-display-settings or equivalent), you now have a functional script =
to
activate your custom refresh rate.
Now to make this auto load with each reboot or relog: add the
trigger_custom_refresh.sh file to startup applications if necessary so it
auto-loads and triggers immediately after session-login. No sudo required,
it'll load per user session or higher depending on what folder you run it o=
ut
of.
****************************
LAST NOTE: I've found enabling "Tear Free" on my card, an RX590 =
to be
necessary to remove tearing in Proton+Vulkan games and some other OpenGL ga=
mes.
TO ENABLE AMD's TEARFREE FEATURE:
How to enable AMD's "Tear Free" option on their AMD Radeon RX 5xx=
(Polaris)
cards:
Time to mess around with xorg.conf.
=
https://wiki.archlinux.org/index.php/AMDGPU#Xorg_configuration 25
Open a terminal and type the command:
sudo mousepad /etc/X11/xorg.conf.d/20-amdgpu.conf
(or substitute mousepad for whatever basic text editor you like)
Then copy and paste the below text starting with "Section" and en=
ding with
"EndSection" into the text editor.
Section "Device"=20
Identifier "AMD"=20
Driver "amdgpu"=20
Option "TearFree" "true"=20
EndSection
Save and quit. This is all presumed that you're using the open source MESA
driver. After that. Reboot your computer.=20
Enjoy TearFree