Hi,
I built a new PC, my first build for myself, so much fun! So I bought a new BenQ EX3501R monitor. At 60hz, it doesn’t have the mouse jittering across the screen issue. When I turn it to 100hz in “displays under Settings”, it jitters. It also does the same in games through Steam.
I have Windows 10 on a separate ssd, and it doesn’t do the same thing.
I also have an LG 650F monitor 144hz, and it doesn’t have the issue.
Still a Linux Newb, but know enough to get myself into trouble, 
Any ideas would be so much appreciated. I read online that perhaps enabling Freesync in Linux would help with higher refresh, but all the commands for the terminal I found were unrecognized in PopOS. I love this monitor for work and gaming. The colors are so much better than the calibrated LG, so I want it to be my daily driver, so any any help would be a godsend! Thanks so much.
Just a lot of system information: 
pop-os
description: Computer
width: 64 bits
capabilities: smp vsyscall32
*-core
description: Motherboard
physical id: 0
*-memory
description: System memory
physical id: 0
size: 32GiB
*-cpu
product: AMD Ryzen 5 3600 6-Core Processor
vendor: Advanced Micro Devices [AMD]
physical id: 1
bus info: cpu@0
size: 2181MHz
capacity: 3600MHz
width: 64 bits
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp x86-64 constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate sme ssbd mba sev ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif umip rdpid overflow_recov succor smca cpufreq
*-pci:0
description: Host bridge
product: Starship/Matisse Root Complex
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 100
bus info: pci@0000:00:00.0
version: 00
width: 32 bits
clock: 33MHz
*-generic UNCLAIMED
description: IOMMU
product: Starship/Matisse IOMMU
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0.2
bus info: pci@0000:00:00.2
version: 00
width: 32 bits
clock: 33MHz
capabilities: cap_list
configuration: latency=0
*-pci:0
description: PCI bridge
product: Starship/Matisse GPP Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 1.1
bus info: pci@0000:00:01.1
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:26 memory:fcf00000-fcffffff
*-storage
description: Non-Volatile memory controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: 03
width: 64 bits
clock: 33MHz
capabilities: storage nvm_express bus_master cap_list
configuration: driver=nvme latency=0
resources: irq:54 memory:fcf00000-fcf03fff
*-pci:1
description: PCI bridge
product: Starship/Matisse GPP Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 1.3
bus info: pci@0000:00:01.3
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:27 ioport:f000(size=4096) memory:fcb00000-fccfffff
*-usb
description: USB controller
product: 400 Series Chipset USB 3.1 XHCI Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0
bus info: pci@0000:03:00.0
version: 01
width: 64 bits
clock: 33MHz
capabilities: xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:43 memory:fcca0000-fcca7fff
*-sata
description: SATA controller
product: 400 Series Chipset SATA Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0.1
bus info: pci@0000:03:00.1
version: 01
width: 32 bits
clock: 33MHz
capabilities: sata ahci_1.0 bus_master cap_list rom
configuration: driver=ahci latency=0
resources: irq:53 memory:fcc80000-fcc9ffff memory:fcc00000-fcc7ffff
*-pci
description: PCI bridge
product: 400 Series Chipset PCIe Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0.2
bus info: pci@0000:03:00.2
version: 01
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:34 ioport:f000(size=4096) memory:fcb00000-fcbfffff
*-pci:0
description: PCI bridge
product: 400 Series Chipset PCIe Port
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0
bus info: pci@0000:20:00.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:36
*-pci:1
description: PCI bridge
product: 400 Series Chipset PCIe Port
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 1
bus info: pci@0000:20:01.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:38 ioport:f000(size=4096) memory:fcb00000-fcbfffff
*-network
description: Ethernet interface
product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller
vendor: Realtek Semiconductor Co., Ltd.
physical id: 0
bus info: pci@0000:22:00.0
logical name: enp34s0
version: 15
serial: 2c:f0:5d:0b:4a:40
size: 1Gbit/s
capacity: 1Gbit/s
width: 64 bits
clock: 33MHz
capabilities: bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8169 duplex=full firmware=rtl8168h-2_0.0.2 02/26/15 ip=192.168.0.186 latency=0 link=yes multicast=yes port=MII speed=1Gbit/s
resources: irq:37 ioport:f000(size=256) memory:fcb04000-fcb04fff memory:fcb00000-fcb03fff
*-pci:2
description: PCI bridge
product: 400 Series Chipset PCIe Port
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 4
bus info: pci@0000:20:04.0
version: 01
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:39
*-pci:2
description: PCI bridge
product: Starship/Matisse GPP Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 3.1
bus info: pci@0000:00:03.1
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:28 ioport:e000(size=4096) memory:fc900000-fcafffff ioport:e0000000(size=270532608)
*-pci
description: PCI bridge
product: Advanced Micro Devices, Inc. [AMD/ATI]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:26:00.0
version: c1
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:41 memory:fca00000-fca03fff ioport:e000(size=4096) memory:fc900000-fc9fffff ioport:e0000000(size=270532608)
*-pci
description: PCI bridge
product: Advanced Micro Devices, Inc. [AMD/ATI]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:27:00.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:42 ioport:e000(size=4096) memory:fc900000-fc9fffff ioport:e0000000(size=270532608)
*-display
description: VGA compatible controller
product: Navi 10
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:28:00.0
version: c1
width: 64 bits
clock: 33MHz
capabilities: vga_controller bus_master cap_list rom
configuration: driver=amdgpu latency=0
resources: irq:61 memory:e0000000-efffffff memory:f0000000-f01fffff ioport:e000(size=256) memory:fc900000-fc97ffff memory:c0000-dffff
*-multimedia
description: Audio device
product: Navi 10 HDMI Audio
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0.1
bus info: pci@0000:28:00.1
version: 00
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:74 memory:fc9a0000-fc9a3fff
*-pci:3
description: PCI bridge
product: Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B]
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 7.1
bus info: pci@0000:00:07.1
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:30
*-generic UNCLAIMED
description: Non-Essential Instrumentation
product: Starship/Matisse PCIe Dummy Function
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0
bus info: pci@0000:29:00.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: cap_list
configuration: latency=0
*-pci:4
description: PCI bridge
product: Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B]
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 8.1
bus info: pci@0000:00:08.1
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:31 memory:fc600000-fc8fffff
*-generic:0 UNCLAIMED
description: Non-Essential Instrumentation
product: Starship/Matisse Reserved SPP
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0
bus info: pci@0000:2a:00.0
version: 00
width: 32 bits
clock: 33MHz
capabilities: cap_list
configuration: latency=0
*-generic:1
description: Encryption controller
product: Starship/Matisse Cryptographic Coprocessor PSPCPP
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0.1
bus info: pci@0000:2a:00.1
version: 00
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=ccp latency=0
resources: irq:70 memory:fc700000-fc7fffff memory:fc808000-fc809fff
*-usb
description: USB controller
product: Matisse USB 3.0 Host Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0.3
bus info: pci@0000:2a:00.3
version: 00
width: 64 bits
clock: 33MHz
capabilities: xhci bus_master cap_list
configuration: driver=xhci_hcd latency=0
resources: irq:44 memory:fc600000-fc6fffff
*-multimedia
description: Audio device
product: Starship/Matisse HD Audio Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0.4
bus info: pci@0000:2a:00.4
version: 00
width: 32 bits
clock: 33MHz
capabilities: bus_master cap_list
configuration: driver=snd_hda_intel latency=0
resources: irq:76 memory:fc800000-fc807fff
*-pci:5
description: PCI bridge
product: Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B]
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 8.2
bus info: pci@0000:00:08.2
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:32 memory:fce00000-fcefffff
*-sata
description: SATA controller
product: FCH SATA Controller [AHCI mode]
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0
bus info: pci@0000:30:00.0
version: 51
width: 32 bits
clock: 33MHz
capabilities: sata ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=0
resources: irq:57 memory:fce00000-fce007ff
*-pci:6
description: PCI bridge
product: Starship/Matisse Internal PCIe GPP Bridge 0 to bus[E:B]
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 8.3
bus info: pci@0000:00:08.3
version: 00
width: 32 bits
clock: 33MHz
capabilities: pci normal_decode bus_master cap_list
configuration: driver=pcieport
resources: irq:33 memory:fcd00000-fcdfffff
*-sata
description: SATA controller
product: FCH SATA Controller [AHCI mode]
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 0
bus info: pci@0000:31:00.0
version: 51
width: 32 bits
clock: 33MHz
capabilities: sata ahci_1.0 bus_master cap_list
configuration: driver=ahci latency=0
resources: irq:59 memory:fcd00000-fcd007ff
*-serial
description: SMBus
product: FCH SMBus Controller
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 14
bus info: pci@0000:00:14.0
version: 61
width: 32 bits
clock: 66MHz
configuration: driver=piix4_smbus latency=0
resources: irq:0
*-isa
description: ISA bridge
product: FCH LPC Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 14.3
bus info: pci@0000:00:14.3
version: 51
width: 32 bits
clock: 66MHz
capabilities: isa bus_master
configuration: latency=0
*-pci:1
description: Host bridge
product: Starship/Matisse PCIe Dummy Host Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 101
bus info: pci@0000:00:01.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:2
description: Host bridge
product: Starship/Matisse PCIe Dummy Host Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 102
bus info: pci@0000:00:02.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:3
description: Host bridge
product: Starship/Matisse PCIe Dummy Host Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 103
bus info: pci@0000:00:03.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:4
description: Host bridge
product: Starship/Matisse PCIe Dummy Host Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 104
bus info: pci@0000:00:04.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:5
description: Host bridge
product: Starship/Matisse PCIe Dummy Host Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 105
bus info: pci@0000:00:05.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:6
description: Host bridge
product: Starship/Matisse PCIe Dummy Host Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 106
bus info: pci@0000:00:07.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:7
description: Host bridge
product: Starship/Matisse PCIe Dummy Host Bridge
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 107
bus info: pci@0000:00:08.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:8
description: Host bridge
product: Matisse Device 24: Function 0
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 108
bus info: pci@0000:00:18.0
version: 00
width: 32 bits
clock: 33MHz
*-pci:9
description: Host bridge
product: Matisse Device 24: Function 1
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 109
bus info: pci@0000:00:18.1
version: 00
width: 32 bits
clock: 33MHz
*-pci:10
description: Host bridge
product: Matisse Device 24: Function 2
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 10a
bus info: pci@0000:00:18.2
version: 00
width: 32 bits
clock: 33MHz
*-pci:11
description: Host bridge
product: Matisse Device 24: Function 3
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 10b
bus info: pci@0000:00:18.3
version: 00
width: 32 bits
clock: 33MHz
configuration: driver=k10temp
resources: irq:0
*-pci:12
description: Host bridge
product: Matisse Device 24: Function 4
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 10c
bus info: pci@0000:00:18.4
version: 00
width: 32 bits
clock: 33MHz
*-pci:13
description: Host bridge
product: Matisse Device 24: Function 5
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 10d
bus info: pci@0000:00:18.5
version: 00
width: 32 bits
clock: 33MHz
*-pci:14
description: Host bridge
product: Matisse Device 24: Function 6
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 10e
bus info: pci@0000:00:18.6
version: 00
width: 32 bits
clock: 33MHz
*-pci:15
description: Host bridge
product: Matisse Device 24: Function 7
vendor: Advanced Micro Devices, Inc. [AMD]
physical id: 10f
bus info: pci@0000:00:18.7
version: 00
width: 32 bits
clock: 33MHz
*-pnp00:00
product: PnP device PNP0c01
physical id: 2
capabilities: pnp
configuration: driver=system
*-pnp00:01
product: PnP device PNP0c02
physical id: 3
capabilities: pnp
configuration: driver=system
*-pnp00:02
product: PnP device PNP0b00
physical id: 4
capabilities: pnp
configuration: driver=rtc_cmos
*-pnp00:03
product: PnP device PNP0c02
physical id: 5
capabilities: pnp
configuration: driver=system
*-pnp00:04
product: PnP device PNP0501
physical id: 6
capabilities: pnp
configuration: driver=serial
*-pnp00:05
product: PnP device PNP0c02
physical id: 7
capabilities: pnp
configuration: driver=system
WARNING: output may be incomplete or inaccurate, you should run this program as super-user.
qwerty@pop-os:~$
Any other information I can provide, just let me know…