White horizontal lines flickering when screen comes out of sleep

lsxy · 12 June 2026 08:47

When the OS puts my screen to sleep, it starts flickering with horizontal white lines occasionally mainly on the login screen, when switching application using alt + tab, in game menus etc. (I suspect when GPU clocks increase)

I’ve been having this since installation using the Manjaro + KDE plasma installer. (6 weeks ago)
I have reinstalled the open source amdgpu drivers but that made no difference.
I can stop the flickering when I set the refresh rate to 60Hz and back to 165Hz in plasma!

Another issue that might be related: When I put the PC to sleep my GPU starts going full throttle and consumes 400W, when I let plasma put the PC to sleep using the timer this issue does not occur. I checked my BIOS for this one and reset it to defaults but no success.

My specs: GPU: [ASRock AMD Radeon RX 7900 XTX Taichi 24GB OC] amdgpu open source drivers.
Mobo: [ASRock X670E Taichi]
CPU: [AMD Ryzen 9 7950X Boxed]
Display: [Iiyama G-Master GB3467WQSU-B5 Zwart] 165Hz, 3440x1440, Displayport 1.4

scotty65 · 12 June 2026 10:06

Welcome to the Manjaro community @lsxy

Please provide the output of:

inxi --filter --verbosity=8

or the short form (preferred):

inxi -zv8

inxi man pages (Arch Manual)

Running `inxi` in `chroot`

Providing `inxi` when you cannot access your desktop environment

Providing `inxi` when you cannot access your desktop environment:

If you are unable to copy and paste the inxi output due to being unable to access your desktop, but can still access a TTY text session, then you can send the inxi output to a pastebin service:
inxi -zv8c0 | nc termbin.com 9999
Note: the nc command may require installation of the openbsd-netcat package:
pamac install openbsd-netcat
or
sudo pacman -Syu openbsd-netcat
After the output is sent, a link to the inxi output will be provided, which you can then add to your forum post.

If you are not allowed to post links in the forum due to being a new member, you can still paste the link as code by typing 3 backticks ``` on empty lines above and below the pasted URL.

Any code or command output (such as inxi output) should be placed within a scrollable pre-formatted text enclosure according to forum guidelines.

See here for instructions

[Mini How-To] format code or command output

Select and copy all the text in the Terminal window (minus the prompt, if you are using zsh).

Then paste the output in between two lines containing three backticks:
```
or three tildes:
~~~

Or:

Copy & paste, then highlight the pasted text and click the </> button at the top of the reply window (easier for smaller outputs).

Regarding your reinstalling of amdgpu drivers:

AMD GPU drivers are included in the kernel, so you probably don’t need to install any special amdgpu packages. Could you please provide the name of the AMD GPU package that you reinstalled?

Also, a list of all AMD packages that are installed on your system might be helpful - please provide the output of the following command:

pamac search -i amd

lsxy · 12 June 2026 21:41

Hi Scotty, thanks for the rapid reply, I don’t remember exactly. I think I just checked the amdgpu package and tried to reinstall ‘linux-firmware-amdgpu’ using pacman. Either way I dont think I changed the system doing it.

Commands and output:

❯ inxi -zv8
System:
  Kernel: 6.18.33-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 16.1.1
    clocksource: tsc avail: hpet,acpi_pm
    parameters: BOOT_IMAGE=/@/boot/vmlinuz-6.18-x86_64
    root=UUID=70033e1a-c228-45d0-966e-42f31e1f7b22 rw rootflags=subvol=@
    quiet splash iommu=pt amdgpu.sg_display=0 pcie_aspm=off
    mem_sleep_default=deep amdgpu.runpm=0 amdgpu.abmlevel=0 amdgpu.bapm=0
    pcie_port_pm=off amdgpu.mclk_dpm_en=0
  Desktop: KDE Plasma v: 6.6.5 tk: Qt v: N/A info: frameworks v: 6.26.0
    wm: kwin_wayland vt: 1 dm: SDDM Distro: Manjaro base: Arch Linux
Machine:
  Type: Desktop Mobo: ASRock model: X670E Taichi serial: <superuser required>
    uuid: <superuser required> Firmware: UEFI vendor: American Megatrends LLC.
    v: 4.20 date: 04/16/2026
Battery:
  Message: No system battery data found. Is one present?
Memory:
  System RAM: total: 32 GiB available: 30.92 GiB used: 7.79 GiB (25.2%)
  Message: For most reliable report, use superuser + dmidecode.
  Array-1: capacity: 128 GiB slots: 4 modules: 2 EC: None
    max-module-size: 32 GiB note: est.
  Device-1: Channel-A DIMM 0 type: no module installed
  Device-2: Channel-A DIMM 1 type: DDR5 detail: synchronous unbuffered
    (unregistered) size: 16 GiB speed: spec: 5600 MT/s actual: 6200 MT/s
    volts: note: check curr: 1 min: 1 max: 1 width (bits): data: 64 total: 64
    manufacturer: N/A part-no: RG33D516GX2-8000C38B serial: N/A
  Device-3: Channel-B DIMM 0 type: no module installed
  Device-4: Channel-B DIMM 1 type: DDR5 detail: synchronous unbuffered
    (unregistered) size: 16 GiB speed: spec: 5600 MT/s actual: 6200 MT/s
    volts: note: check curr: 1 min: 1 max: 1 width (bits): data: 64 total: 64
    manufacturer: N/A part-no: RG33D516GX2-8000C38B serial: N/A
PCI Slots:
  Permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: AMD Ryzen 9 7950X bits: 64 type: MT MCP arch: Zen 4 gen: 4
    level: v4 note: check built: 2022+ process: TSMC n5 (5nm) family: 0x19 (25)
    model-id: 0x61 (97) stepping: 2 microcode: 0xA60120C
  Topology: cpus: 1x dies: 2 clusters: 2x1 cores: 16 threads: 32 tpc: 2
    smt: enabled cache: L1: 1024 KiB desc: d-16x32 KiB; i-16x32 KiB L2: 16 MiB
    desc: 16x1024 KiB L3: 64 MiB desc: 2x32 MiB
  Speed (MHz): avg: 5400 min/max: 425/5883 boost: enabled scaling:
    driver: amd-pstate-epp governor: performance cores: 1: 5400 2: 5400 3: 5400
    4: 5400 5: 5400 6: 5400 7: 5400 8: 5400 9: 5400 10: 5400 11: 5400 12: 5400
    13: 5400 14: 5400 15: 5400 16: 5400 17: 5400 18: 5400 19: 5400 20: 5400
    21: 5400 22: 5400 23: 5400 24: 5400 25: 5400 26: 5400 27: 5400 28: 5400
    29: 5400 30: 5400 31: 5400 32: 5400 bogomips: 297107
  Flags: 3dnowprefetch abm adx aes amd_lbr_pmc_freeze amd_lbr_v2 aperfmperf
    apic arat avic avx avx2 avx512_bf16 avx512_bitalg avx512_vbmi2
    avx512_vnni avx512_vpopcntdq avx512bw avx512cd avx512dq avx512f
    avx512ifma avx512vbmi avx512vl bmi1 bmi2 bpext cat_l3 cdp_l3 clflush
    clflushopt clwb clzero cmov cmp_legacy constant_tsc cpb cppc cpuid
    cpuid_fault cqm cqm_llc cqm_mbm_local cqm_mbm_total cqm_occup_llc
    cr8_legacy cx16 cx8 de decodeassists erms extapic extd_apicid f16c
    flush_l1d flushbyasid fma fpu fsgsbase fsrm fxsr fxsr_opt gfni ht
    hw_pstate ibpb ibrs ibrs_enhanced 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 perfmon_v2
    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 user_shstk v_spec_ctrl vaes vgif vmcb_clean vme
    vmmcall vnmi vpclmulqdq wbnoinvd wdt x2avic xgetbv1 xsave xsavec
    xsaveerptr xsaveopt xsaves xtopology
  Vulnerabilities:
  Type: gather_data_sampling status: Not affected
  Type: ghostwrite status: Not affected
  Type: indirect_target_selection status: Not affected
  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: old_microcode status: Not affected
  Type: reg_file_data_sampling status: Not affected
  Type: retbleed status: Not affected
  Type: spec_rstack_overflow mitigation: Safe RET
  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: Enhanced / Automatic IBRS; IBPB:
    conditional; STIBP: always-on; PBRSB-eIBRS: Not affected; BHI: Not
    affected
  Type: srbds status: Not affected
  Type: tsa mitigation: Clear CPU buffers
  Type: tsx_async_abort status: Not affected
  Type: vmscape mitigation: IBPB before exit to userspace
Graphics:
  Device-1: Advanced Micro Devices [AMD/ATI] Navi 31 [Radeon RX 7900 XT/7900
    XTX/7900 GRE/7900M] vendor: ASRock driver: amdgpu v: kernel arch: RDNA-3
    code: Navi-3x process: TSMC n5 (5nm) built: 2022+ pcie: gen: 4
    speed: 16 GT/s lanes: 16 ports: active: DP-1 empty: DP-2, DP-3, HDMI-A-1,
    Writeback-1 bus-ID: 03:00.0 chip-ID: 1002:744c class-ID: 0300
  Display: wayland server: X.org v: 1.21.1.22 with: Xwayland v: 24.1.11
    compositor: kwin_wayland driver: X: loaded: amdgpu
    unloaded: modesetting,radeon alternate: fbdev,vesa dri: radeonsi
    gpu: amdgpu display-ID: 0
  Monitor-1: DP-1 model: Idek Iiyama PL3467WQ serial: <filter> built: 2022
    res: mode: 3440x1440 hz: 165 scale: 100% (1) dpi: 110 gamma: 1.2 chroma:
    red: x: 0.675 y: 0.310 green: x: 0.278 y: 0.651 blue: x: 0.153 y: 0.071
    white: x: 0.314 y: 0.329 size: 797x334mm (31.38x13.15") diag: 864mm (34")
    modes: 3440x1440, 3840x2160, 1920x1080, 1680x1050, 1280x1024, 1440x900,
    1280x960, 1152x864, 1280x720, 1024x768, 800x600, 720x576, 720x480,
    640x480, 720x400
  EDID-Warnings: 1: parse_edid: unhandled CEA mode 97 2: parse_edid:
    unhandled CEA mode 96 3: parse_edid: unknown tag 112
  API: EGL v: 1.5 hw: drv: amd radeonsi platforms: device: 0 drv: radeonsi
    device: 1 drv: swrast gbm: drv: radeonsi surfaceless: drv: radeonsi wayland:
    drv: radeonsi x11: drv: radeonsi
  API: OpenGL v: 4.6 vendor: amd mesa v: 26.1.1-arch1.2 glx-v: 1.4
    direct-render: yes renderer: AMD Radeon RX 7900 XTX (radeonsi navi31 ACO
    DRM 3.64 6.18.33-1-MANJARO) device-ID: 1002:744c memory: 23.44 GiB
    unified: no display-ID: :1.0
  API: Vulkan v: 1.4.350 layers: 9 device: 0 type: discrete-gpu name: AMD
    Radeon RX 7900 XTX (RADV NAVI31) driver: mesa radv v: 26.1.1-arch1.2
    device-ID: 1002:744c surfaces: N/A
  Info: Tools: api: clinfo, eglinfo, glxinfo, vulkaninfo
    de: kscreen-console,kscreen-doctor gpu: lact wl: wayland-info
    x11: xdpyinfo, xprop, xrandr
Audio:
  Device-1: Advanced Micro Devices [AMD/ATI] Navi 31 HDMI/DP Audio
    driver: snd_hda_intel v: kernel pcie: gen: 4 speed: 16 GT/s lanes: 16
    bus-ID: 03:00.1 chip-ID: 1002:ab30 class-ID: 0403
  Device-2: miniDSP UMIK-2 driver: hid-generic,snd-usb-audio,usbhid
    type: USB rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0 bus-ID: 3-1:2
    chip-ID: 2752:002b class-ID: 0300 serial: <filter>
  Device-3: Thesycon System & Consulting GmbH SMSL M8A 1.1.2
    driver: snd-usb-audio type: USB rev: 2.0 speed: 480 Mb/s lanes: 1 mode: 2.0
    bus-ID: 5-12:4 chip-ID: 152a:85dd class-ID: fe01
  API: ALSA v: k6.18.33-1-MANJARO status: kernel-api with: aoss
    type: oss-emulator tools: alsactl,alsamixer,amixer
  Server-1: sndiod v: N/A status: off tools: aucat,midicat,sndioctl
  Server-2: JACK v: 1.9.22 status: off tools: N/A
  Server-3: PipeWire v: 1.6.5 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Device-1: Realtek Killer E3000 2.5GbE vendor: ASRock driver: r8169 v: kernel
    pcie: gen: 2 speed: 5 GT/s lanes: 1 port: b000 bus-ID: 49:00.0
    chip-ID: 10ec:3000 class-ID: 0200
  IF: enp73s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: dynamic noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: link
  Info: services: NetworkManager,systemd-timesyncd
  WAN IP: <filter>
Bluetooth:
  Device-1: Realtek Bluetooth Radio driver: btusb v: 0.8 type: USB rev: 1.1
    speed: 12 Mb/s lanes: 1 mode: 1.1 bus-ID: 5-3:2 chip-ID: 0bda:8771
    class-ID: e001 serial: <filter>
  Report: rfkill ID: hci1 rfk-id: 2 state: up address: see --recommends
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 2.73 TiB used: 275.8 GiB (9.9%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Western Digital
    model: WD BLACK SN850X 2000GB size: 1.82 TiB block-size: physical: 512 B
    logical: 512 B speed: 63.2 Gb/s lanes: 4 tech: SSD serial: <filter>
    fw-rev: 620311WD temp: 43.9 C scheme: GPT
  ID-2: /dev/sda maj-min: 8:0 vendor: Crucial model: CT1000MX500SSD1
    size: 931.51 GiB block-size: physical: 512 B logical: 512 B speed: 6.0 Gb/s
    tech: SSD serial: <filter> fw-rev: 023 scheme: MBR
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 400 GiB size: 400 GiB (100.00%) used: 275.77 GiB (68.9%)
    fs: btrfs dev: /dev/nvme0n1p5 maj-min: 259:5 label: N/A
    uuid: 70033e1a-c228-45d0-966e-42f31e1f7b22
  ID-2: /boot/efi raw-size: 100 MiB size: 96 MiB (96.00%)
    used: 31.8 MiB (33.2%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1
    label: N/A uuid: 125B-D5C0
  ID-3: /home raw-size: 400 GiB size: 400 GiB (100.00%)
    used: 275.77 GiB (68.9%) fs: btrfs dev: /dev/nvme0n1p5 maj-min: 259:5
    label: N/A uuid: 70033e1a-c228-45d0-966e-42f31e1f7b22
  ID-4: /var/cache raw-size: 400 GiB size: 400 GiB (100.00%)
    used: 275.77 GiB (68.9%) fs: btrfs dev: /dev/nvme0n1p5 maj-min: 259:5
    label: N/A uuid: 70033e1a-c228-45d0-966e-42f31e1f7b22
  ID-5: /var/log raw-size: 400 GiB size: 400 GiB (100.00%)
    used: 275.77 GiB (68.9%) fs: btrfs dev: /dev/nvme0n1p5 maj-min: 259:5
    label: N/A uuid: 70033e1a-c228-45d0-966e-42f31e1f7b22
Swap:
  Alert: No swap data was found.
Unmounted:
  ID-1: /dev/nvme0n1p2 maj-min: 259:2 size: 16 MiB fs: <superuser required>
    label: N/A uuid: N/A
  ID-2: /dev/nvme0n1p3 maj-min: 259:3 size: 1.43 TiB fs: ntfs label: N/A
    uuid: 01DCCB5D3164D100
  ID-3: /dev/nvme0n1p4 maj-min: 259:4 size: 770 MiB fs: ntfs label: N/A
    uuid: F220078120074BD3
  ID-4: /dev/sda1 maj-min: 8:1 size: 931.51 GiB fs: ntfs label: Game Drive
    uuid: 80CE4692CE468100
USB:
  Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-2: 2-0:1 info: super-speed hub ports: 2 rev: 3.1
    speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-3: 3-0:1 info: hi-speed hub with single TT ports: 12 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Device-1: 3-1:2 info: miniDSP UMIK-2 type: audio,HID
    driver: hid-generic,snd-usb-audio,usbhid interfaces: 4 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 100mA
    chip-ID: 2752:002b class-ID: 0300 serial: <filter>
  Hub-4: 3-3:3 info: VIA Labs Hub ports: 4 rev: 2.1
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 2109:2811
    class-ID: 0900
  Hub-5: 4-0:1 info: super-speed hub ports: 6 rev: 3.1
    speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-6: 5-0:1 info: hi-speed hub with single TT ports: 12 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Device-1: 5-3:2 info: Realtek Bluetooth Radio type: bluetooth
    driver: btusb interfaces: 2 rev: 1.1 speed: 12 Mb/s (1.4 MiB/s) lanes: 1
    mode: 1.1 power: 500mA chip-ID: 0bda:8771 class-ID: e001 serial: <filter>
  Hub-7: 5-5:3 info: Genesys Logic Hub ports: 4 rev: 2.1
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 100mA
    chip-ID: 05e3:0610 class-ID: 0900
  Device-1: 5-5.2:5 info: WL WLMOUSE SWORD X 8K RECEIVER
    type: mouse,keyboard,HID driver: hid-generic,usbhid interfaces: 3 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 500mA
    chip-ID: 36a7:a878 class-ID: 0300 serial: <filter>
  Device-2: 5-5.3:6 info: Endor AG ClubSportPedal type: HID
    driver: fanatec,usbhid interfaces: 1 rev: 2.0 speed: 12 Mb/s (1.4 MiB/s)
    lanes: 1 mode: 1.1 power: 100mA chip-ID: 0eb7:183b class-ID: 0300
  Device-3: 5-12:4 info: Thesycon System & Consulting GmbH SMSL M8A 1.1.2
    type: audio driver: snd-usb-audio interfaces: 3 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 152a:85dd
    class-ID: fe01
  Hub-8: 6-0:1 info: super-speed hub ports: 5 rev: 3.1
    speed: 20 Gb/s (2.33 GiB/s) lanes: 2 mode: 3.2 gen-2x2 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-9: 6-5:2 info: Genesys Logic Hub ports: 4 rev: 3.2
    speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 chip-ID: 05e3:0626
    class-ID: 0900
  Hub-10: 7-0:1 info: hi-speed hub with single TT ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-11: 8-0:1 info: super-speed hub ports: 2 rev: 3.1
    speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-12: 9-0:1 info: hi-speed hub with single TT ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Device-1: 9-1:2 info: ATK Hex80 type: keyboard,HID
    driver: hid-generic,usbhid interfaces: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 power: 500mA
    chip-ID: 373b:1177 class-ID: 0300 serial: <filter>
  Hub-13: 10-0:1 info: super-speed hub ports: 2 rev: 3.1
    speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-14: 11-0:1 info: hi-speed hub with single TT ports: 1 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Device-1: 11-1:2 info: ASRock LED Controller type: HID
    driver: hid-generic,usbhid interfaces: 1 rev: 1.1 speed: 12 Mb/s (1.4 MiB/s)
    lanes: 1 mode: 1.1 power: 100mA chip-ID: 26ce:01a2 class-ID: 0300
    serial: <filter>
Sensors:
  System Temperatures: cpu: 54.5 C mobo: 45.0 C gpu: amdgpu temp: 49.0 C
    mem: 61.0 C
  Fan Speeds (rpm): N/A gpu: amdgpu fan: 835
Repos:
  Packages: 1703 pm: pacman pkgs: 1695 libs: 415 tools: pamac,yay pm: flatpak
    pkgs: 0 pm: snap pkgs: 8
  Active pacman repo servers in: /etc/pacman.d/mirrorlist
    1: https://ftp.lysator.liu.se/pub/manjaro/stable/$repo/$arch
    2: https://mirror.math.princeton.edu/pub/manjaro/stable/$repo/$arch
    3: https://volico.mm.fcix.net/manjaro/stable/$repo/$arch
    4: https://ipng.mm.fcix.net/manjaro/stable/$repo/$arch
    5: https://ziply.mm.fcix.net/manjaro/stable/$repo/$arch
    6: https://repo.ialab.dsu.edu/manjaro/stable/$repo/$arch
    7: https://mirror.xeonbd.com/manjaro/stable/$repo/$arch
    8: https://forksystems.mm.fcix.net/manjaro/stable/$repo/$arch
Processes:
  CPU top: 5 of 609
  1: cpu: 39.2% command: steamwebhelper pid: 4645 mem: 228.1 MiB (0.7%)
  2: cpu: 21.9% command: obs pid: 7701 mem: 382.5 MiB (1.2%)
  3: cpu: 8.8% command: easyeffects pid: 1699 mem: 278.4 MiB (0.8%)
  4: cpu: 7.7% command: firefox pid: 2684 mem: 832.7 MiB (2.6%)
  5: cpu: 7.3% command: kwin_wayland pid: 1122 mem: 365.4 MiB (1.1%)
  Memory top: 5 of 609
  1: mem: 832.7 MiB (2.6%) command: firefox pid: 2684 cpu: 7.7%
  2: mem: 594.7 MiB (1.8%) command: thunderbird pid: 12775 cpu: 0.6%
  3: mem: 474.6 MiB (1.4%) command: spotify pid: 8763 cpu: 1.1%
  4: mem: 472.2 MiB (1.4%) command: exe pid: 2344 cpu: 1.8%
  5: mem: 462.3 MiB (1.4%) command: steamwebhelper pid: 3352 cpu: 0.0%
Info:
  Processes: 609 Power: uptime: 1h 47m states: freeze,mem,disk suspend: deep
    avail: s2idle wakeups: 0 hibernate: platform avail: shutdown, reboot,
    suspend, test_resume image: 12.28 GiB services: org_kde_powerdevil,
    power-profiles-daemon, upowerd Init: systemd v: 260 default: graphical
    tool: systemctl
  Compilers: clang: 22.1.5 gcc: 16.1.1 Shell: Zsh v: 5.9 running-in: konsole
    inxi: 3.3.40

❯ pamac search -i amd
libteam  1.32-3                                                                                                                                                                       extra
    Library for controlling team network device
xf86-video-amdgpu  25.0.0-1                                                                                                                                                           extra
    X.org amdgpu video driver
mhwd-amdgpu  19.1.0-1                                                                                                                                                                 extra
    MHWD module-ids for amdgpu
linux-firmware-amdgpu  20260519-1                                                                                                                                                      core
    Firmware files for Linux - Firmware for AMD Radeon GPUs
hip-runtime-amd  7.2.3-1                                                                                                                                                              extra
    Heterogeneous Interface for Portability (AMD runtime)
amd-ucode  20260519-1                                                                                                                                                                  core
    Microcode update image for AMD CPUs

soundofthunder · 13 June 2026 09:02

Are you using a multiple monitor configuration?

This should of course have been disclosed in your first post, along with any other information that might have been relevant, however, if you are using multiple monitors, does this issue go away when both are set to the same mutually supported refresh rate?

lsxy · 13 June 2026 12:46

Nope a single widescreen monitor, as stated and can be seen in the inxi output:

Monitor-1: DP-1 model: Idek Iiyama PL3467WQ serial: <filter> built: 2022
    res: mode: 3440x1440 hz: 165 scale: 100%

Connected via DP on the 7900XTX ofc

soundofthunder · 14 June 2026 00:36

Then the possible resolution I had in mind is not relevant.

The question still needed to be asked for the sake of ruling it out.

It’s not uncommon for inxi output to not be representative of hardware in use when an issue is exposed; a monitor may have been temporarily disconnected at the time, for example.

An obvious workaround is to use the 60Hz refresh rate instead.

Sometimes the honourable cable can be the weak link – I assume you have tried swapping out the cable, and trying other Display Ports. Avoid using adapter cables, where possible.

I’ll chime in again if I think of anything else.

Regards.

giulia_privacy408 · 14 June 2026 00:47

One thing I would isolate is VRR/Adaptive Sync. In Plasma, try disabling Adaptive Sync for that display, then log out/in and test the wake path again at 165 Hz. Flicker that disappears after switching refresh rates can be a modeset/VRR state issue, not a missing driver.

Also, while testing I would remove most of the amdgpu/power kernel parameters and keep notes of one change at a time. With a 7900 XTX, current mesa/linux-firmware/kernel are usually the important parts; too many workaround parameters can make suspend/display power behaviour harder to reason about.

scotty65 · 14 June 2026 01:07

That’s interesting. I’m not sure if it is the reason why the issue is occurring, but it might be worth testing if the issue occurs with a newer kernel, such as linux70 or linux71. As the amdgpu driver is included in the kernel, a kernel change often resolves display issues.

If you run the following command in a terminal, it will open the Manjaro Settings Manager GUI showing all kernels which are available for installation on your system:

manjaro-settings-manager -m msm_kernel

In the CLI, you can list available kernels with:

mhwd-kernel -l

Installed kernels can be viewed with:

mhwd-kernel -li

To install a kernel:

sudo mhwd-kernel -i <kernel-name>

For example:

sudo mhwd-kernel -i linux70

To view all mhwd-kernel options:

mhwd-kernel --help

lsxy · 14 June 2026 08:55

I tried with linux kernel 71 but I have the issue still. Again setting the refresh rate to 60Hz and reverting in the plasma display menu solved the white horizontal lines flickering when I alt-tab etc.

❯ mhwd-kernel -li
Currently running: 7.1.0-rc5-1-MANJARO (linux71)
The following kernels are installed in your system:
   * linux618
   * linux71

I tried to record my monitor with obs to see if the lines are visible that way but they don’t show up on video. I could make a recording with my phone if you want to see what it looks like?