AMD Radeon RX 6800 dual monitor font issue

Prior to the installation of the new Radeon RX 6800 I used the Ryzen-internal Graphics which worked fine.
After switching to the dedicated graphics card I have problems with the left (not main) monitor. Both displays are LG 4k displays connected with display port.

Windows on the left screen are having a strange font problem, the letter spacing is to low and it’s hard to read. If I drag the window from one screen to the other the letter spacing changes and Konsole even tells me that the window resizes.
Furthermore I had to create full screen screenshots and crop the Konsole windows because Spectacle made the screenshots in different resolution and position as selected.

I have added screenshots for both displays:


$ mhwd -li                                                     INT ✘ 
> Installed PCI configs:
--------------------------------------------------------------------------------
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
           video-linux            2018.05.04                true            PCI


Warning: No installed USB configs!
$inxi --admin --verbosity=7 --filter --no-host --width            ✔ 
System:
  Kernel: 5.18.19-3-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 12.2.0
    parameters: BOOT_IMAGE=/boot/vmlinuz-5.18-x86_64
    root=UUID=bba5403b-fdfb-4da7-8419-a1c6d3090ddb rw quiet
    udev.log_priority=3
  Desktop: KDE Plasma v: 5.26.4 tk: Qt v: 5.15.7 wm: kwin_x11 vt: 1 dm: SDDM
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Desktop System: ASUS product: N/A v: N/A serial: <superuser required>
  Mobo: ASUSTeK model: Pro B550M-C v: Rev X.0x serial: <superuser required>
    UEFI: American Megatrends v: 2423 date: 08/09/2021
Battery:
  Device-1: hidpp_battery_0 model: Logitech Wireless Mouse MX Master 2S
    serial: <filter> charge: 55% (should be ignored) rechargeable: yes
    status: discharging
Memory:
  RAM: total: 31.15 GiB used: 6.51 GiB (20.9%)
  RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: AMD Ryzen 7 PRO 5750G with Radeon Graphics bits: 64 type: MT MCP
    arch: Zen 3 gen: 4 level: v3 note: check built: 2021-22
    process: TSMC n7 (7nm) family: 0x19 (25) model-id: 0x50 (80) stepping: 0
    microcode: 0xA50000C
  Topology: cpus: 1x cores: 8 tpc: 2 threads: 16 smt: enabled cache:
    L1: 512 KiB desc: d-8x32 KiB; i-8x32 KiB L2: 4 MiB desc: 8x512 KiB L3: 16 MiB
    desc: 1x16 MiB
  Speed (MHz): avg: 2454 high: 2994 min/max: 1400/4672 boost: enabled
    scaling: driver: acpi-cpufreq governor: schedutil cores: 1: 1811 2: 2395
    3: 2394 4: 2392 5: 2992 6: 2391 7: 2395 8: 2394 9: 2994 10: 2394 11: 2395
    12: 2395 13: 2654 14: 2394 15: 2488 16: 2395 bogomips: 121422
  Flags: 3dnowprefetch abm adx aes aperfmperf apic arat avic avx avx2 bmi1
    bmi2 bpext cat_l3 cdp_l3 clflush clflushopt clwb clzero cmov cmp_legacy
    constant_tsc cpb cppc cpuid cqm cqm_llc cqm_mbm_local cqm_mbm_total
    cqm_occup_llc cr8_legacy cx16 cx8 de decodeassists erms extapic
    extd_apicid f16c flushbyasid fma fpu fsgsbase fsrm fxsr fxsr_opt ht
    hw_pstate ibpb ibrs ibs invpcid irperf lahf_lm lbrv lm mba mca mce
    misalignsse mmx mmxext monitor movbe msr mtrr mwaitx nonstop_tsc nopl npt
    nrip_save nx ospke osvw overflow_recov pae pat pausefilter pclmulqdq
    pdpe1gb perfctr_core perfctr_llc perfctr_nb pfthreshold pge pku pni popcnt
    pse pse36 rapl rdpid rdpru rdrand rdseed rdt_a rdtscp rep_good sep sha_ni
    skinit smap smca smep ssbd sse sse2 sse4_1 sse4_2 sse4a ssse3 stibp succor
    svm svm_lock syscall tce topoext tsc tsc_scale umip v_spec_ctrl
    v_vmsave_vmload vaes vgif vmcb_clean vme vmmcall vpclmulqdq wbnoinvd wdt
    xgetbv1 xsave xsavec xsaveerptr xsaveopt xsaves
  Vulnerabilities:
  Type: itlb_multihit status: Not affected
  Type: l1tf status: Not affected
  Type: mds status: Not affected
  Type: meltdown status: Not affected
  Type: mmio_stale_data status: Not affected
  Type: retbleed status: Not affected
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: Retpolines, IBPB: conditional, IBRS_FW,
    STIBP: always-on, RSB filling, PBRSB-eIBRS: Not affected
  Type: srbds status: Not affected
  Type: tsx_async_abort status: Not affected
Graphics:
  Device-1: AMD Navi 21 [Radeon RX 6800/6800 XT / 6900 XT] vendor: ASRock
    driver: amdgpu v: kernel arch: RDNA-2 code: Navi-2x process: TSMC n7 (7nm)
    built: 2020-22 pcie: gen: 4 speed: 16 GT/s lanes: 16 ports:
    active: DP-1,DP-3 empty: DP-2,HDMI-A-1 bus-ID: 03:00.0 chip-ID: 1002:73bf
    class-ID: 0300
  Device-2: ARC Camera type: USB driver: snd-usb-audio,uvcvideo
    bus-ID: 3-1.4:4 chip-ID: 05a3:9331 class-ID: 0102 serial: <filter>
  Display: x11 server: X.Org v: 21.1.6 with: Xwayland v: 22.1.7
    compositor: kwin_x11 driver: X: loaded: amdgpu unloaded: modesetting,radeon
    alternate: fbdev,vesa dri: radeonsi gpu: amdgpu display-ID: :0 screens: 1
  Screen-1: 0 s-res: 7680x2160 s-dpi: 96 s-size: 2030x571mm (79.92x22.48")
    s-diag: 2109mm (83.02")
  Monitor-1: DP-1 mapped: DisplayPort-0 pos: primary,right
    model: LG (GoldStar) Ultra HD serial: <filter> built: 2017 res: 3840x2160
    hz: 60 dpi: 163 gamma: 1.2 size: 600x340mm (23.62x13.39")
    diag: 690mm (27.2") ratio: 16:9 modes: max: 3840x2160 min: 640x480
  Monitor-2: DP-3 mapped: DisplayPort-2 pos: left model: LG (GoldStar) HDR 4K
    serial: <filter> built: 2021 res: 3840x2160 hz: 60 dpi: 163 gamma: 1.2
    size: 600x340mm (23.62x13.39") diag: 690mm (27.2") ratio: 16:9 modes:
    max: 3840x2160 min: 640x480
  API: OpenGL v: 4.6 Mesa 22.3.1 renderer: AMD Radeon RX 6800 (navi21 LLVM
    14.0.6 DRM 3.46 5.18.19-3-MANJARO) direct render: Yes
Audio:
  Device-1: AMD Navi 21/23 HDMI/DP Audio driver: snd_hda_intel v: kernel
    bus-ID: 1-2.1:4 pcie: chip-ID: 0b0e:24c7 gen: 4 class-ID: 0300 speed: 16 GT/s
    lanes: 16 serial: <filter> bus-ID: 03:00.1 chip-ID: 1002:ab28
    class-ID: 0403
  Device-2: AMD Renoir Radeon High Definition Audio vendor: ASUSTeK
    driver: snd_hda_intel v: kernel pcie: gen: 3 speed: 8 GT/s lanes: 16
    link-max: gen: 4 speed: 16 GT/s bus-ID: 0a:00.1 chip-ID: 1002:1637
    class-ID: 0403
  Device-3: AMD Family 17h/19h HD Audio vendor: ASUSTeK PRIME B450M-A
    driver: snd_hda_intel v: kernel pcie: gen: 3 speed: 8 GT/s lanes: 16
    link-max: gen: 4 speed: 16 GT/s bus-ID: 0a:00.6 chip-ID: 1022:15e3
    class-ID: 0403
  Device-4: GN Netcom Jabra Link 380 type: USB
    driver: jabra,snd-usb-audio,usbhid
  Device-5: ARC Camera type: USB driver: snd-usb-audio,uvcvideo
    bus-ID: 3-1.4:4 chip-ID: 05a3:9331 class-ID: 0102 serial: <filter>
  Device-6: JMTek LLC. USB PnP Audio Device type: USB
    driver: hid-generic,snd-usb-audio,usbhid bus-ID: 5-1:2 chip-ID: 0c76:161e
    class-ID: 0300
  Sound API: ALSA v: k5.18.19-3-MANJARO running: yes
  Sound Server-1: JACK v: 1.9.21 running: no
  Sound Server-2: PulseAudio v: 16.1 running: yes
  Sound Server-3: PipeWire v: 0.3.63 running: yes
Network:
  Device-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet
    vendor: ASUSTeK PRIME B450M-A driver: r8169 v: kernel pcie: gen: 1
    speed: 2.5 GT/s lanes: 1 port: e000 bus-ID: 09:00.0 chip-ID: 10ec:8168
    class-ID: 0200
  IF: enp9s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: noprefixroute scope: link
  IF-ID-1: br-227ef181c400 state: down mac: <filter>
  IP v4: <filter> scope: global broadcast: <filter>
  IF-ID-2: br-9fa0851334f5 state: down mac: <filter>
  IP v4: <filter> scope: global broadcast: <filter>
  IF-ID-3: br-cd6e775ba814 state: down mac: <filter>
  IP v4: <filter> scope: global broadcast: <filter>
  IF-ID-4: docker0 state: down mac: <filter>
  Message: Output throttled. IPs: 1; Limit: 10; Override: --limit [1-x;-1
    all]
  WAN IP: <filter>
Bluetooth:
  Device-1: TP-Link UB500 Adapter type: USB driver: btusb v: 0.8 bus-ID: 5-2:3
    chip-ID: 2357:0604 class-ID: e001 serial: <filter>
  Report: rfkill ID: hci0 rfk-id: 0 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 2.69 TiB used: 1.43 TiB (53.1%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung
    model: SSD 970 EVO Plus 2TB size: 1.82 TiB block-size: physical: 512 B
    logical: 512 B speed: 31.6 Gb/s lanes: 4 type: SSD serial: <filter>
    rev: 2B2QEXM7 temp: 42.9 C scheme: GPT
  ID-2: /dev/sda maj-min: 8:0 vendor: Kingston model: SA400S37960G
    size: 894.25 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
    type: SSD serial: <filter> rev: 61F1 scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 1.82 TiB size: 1.79 TiB (98.37%) used: 1.43 TiB (79.9%)
    fs: ext4 dev: /dev/nvme0n1p2 maj-min: 259:2 label: N/A
    uuid: bba5403b-fdfb-4da7-8419-a1c6d3090ddb
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 288 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
    label: NO_LABEL uuid: 8EA5-52BD
Swap:
  Alert: No swap data was found.
Unmounted:
  ID-1: /dev/sda1 maj-min: 8:1 size: 894.25 GiB fs: ext4 label: N/A
    uuid: 9a60b75a-a6bb-43e5-a6f2-146912ae44bf
USB:
  Hub-1: 1-0:1 info: Hi-speed hub with single TT ports: 10 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-2: 1-2:2 info: Cambridge Silicon Radio ports: 4 rev: 2.0 speed: 12 Mb/s
    power: 100mA chip-ID: 0a12:4010 class-ID: 0900
  Device-1: 1-2.1:4 info: GN Netcom Jabra Link 380 type: Audio,HID
    driver: jabra,snd-usb-audio,usbhid interfaces: 4 rev: 2.0 speed: 12 Mb/s
    chip-ID: 0b0e:24c7 class-ID: 0300 serial: <filter>
  Device-2: 1-8:3 info: Logitech Unifying Receiver type: Keyboard,Mouse,HID
    driver: logitech-djreceiver,usbhid interfaces: 3 rev: 2.0 speed: 12 Mb/s
    power: 98mA chip-ID: 046d:c52b class-ID: 0300
  Hub-3: 2-0:1 info: Super-speed hub ports: 4 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
  Hub-4: 3-0:1 info: Hi-speed hub with single TT ports: 4 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Hub-5: 3-1:2 info: VIA Labs VL812 Hub ports: 4 rev: 2.1 speed: 480 Mb/s
    chip-ID: 2109:2812 class-ID: 0900
  Device-1: 3-1.3:3 info: Logitech Illuminated Keyboard type: Keyboard,Mouse
    driver: hid-generic,usbhid interfaces: 2 rev: 2.0 speed: 12 Mb/s power: 300mA
    chip-ID: 046d:c318 class-ID: 0300
  Device-2: 3-1.4:4 info: ARC Camera type: Video,Audio
    driver: snd-usb-audio,uvcvideo interfaces: 4 rev: 2.0 speed: 480 Mb/s
    power: 500mA chip-ID: 05a3:9331 class-ID: 0102 serial: <filter>
  Hub-6: 4-0:1 info: Super-speed hub ports: 2 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
  Hub-7: 4-1:2 info: VIA Labs VL812 Hub ports: 4 rev: 3.0 speed: 5 Gb/s
    chip-ID: 2109:0812 class-ID: 0900
  Hub-8: 5-0:1 info: Hi-speed hub with single TT ports: 4 rev: 2.0
    speed: 480 Mb/s chip-ID: 1d6b:0002 class-ID: 0900
  Device-1: 5-1:2 info: JMTek LLC. USB PnP Audio Device type: Audio,HID
    driver: hid-generic,snd-usb-audio,usbhid interfaces: 3 rev: 1.1
    speed: 12 Mb/s power: 100mA chip-ID: 0c76:161e class-ID: 0300
  Device-2: 5-2:3 info: TP-Link UB500 Adapter type: Bluetooth driver: btusb
    interfaces: 2 rev: 1.1 speed: 12 Mb/s power: 500mA chip-ID: 2357:0604
    class-ID: e001 serial: <filter>
  Hub-9: 6-0:1 info: Super-speed hub ports: 2 rev: 3.1 speed: 10 Gb/s
    chip-ID: 1d6b:0003 class-ID: 0900
Sensors:
  System Temperatures: cpu: 33.0 C mobo: N/A gpu: amdgpu temp: 43.0 C
    mem: 44.0 C
  Fan Speeds (RPM): N/A gpu: amdgpu fan: 0
Info:
  Processes: 389 Uptime: 37m wakeups: 2 Init: systemd v: 252 default: graphical
  tool: systemctl Compilers: gcc: 12.2.0 clang: 14.0.6 Packages: 1877
  pm: pacman pkgs: 1872 libs: 484 tools: pamac,trizen pm: snap pkgs: 5
  Shell: Zsh v: 5.9 default: Bash v: 5.1.16 running-in: konsole inxi: 3.3.24

Can you test it on KDE Wayland?

Ah, nice - thanks for the hint! The problem does not occur when using Wayland.
Works for me as solution as long as no other problems appear using Wayland.

This one is dead , EOL , doesn’t even exist in mhwd anymore.

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