SUMMARY On wayland, when choosing the "Prefer color accuracy" option in the Color accuracy setting available at the Display Configuration, the display flashes a small white horizontal line. This only happens consistently after logging in and for a few seconds. Then, it seems to happen at a random time and once in a while. May not be related, but increasing the power limit of the GPU seems to have a positive effect on the number of times that the white line is shown and the time is takes to go away after logging in. STEPS TO REPRODUCE 1. Go to the System Settings application; 2. On the Input & Output section, choose the Display & Monitor menu; 3. On the Color accuracy setting, change from "Prefer efficiency" to "Prefer color accuracy"; 4. Press the Apply button; 5. Reboot; 6. Log in and after the Splash Screen, verify if the small white horizontal lines show on the screen. ADDITIONAL INFORMATION For additional context, I have an AMD 7900 series GPU. I do not have HDR enabled, only adaptive sync (disabling it did not change anything).
Thanks for the bug report. We'll need a little more information to be able to investigate. First, please let us know this information, from the template: SOFTWARE/OS VERSIONS (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: Also, please paste the information from kscreen-doctor -o Thanks.
SOFTWARE/OS VERSIONS KDE Plasma Version: 6.3.5 KDE Frameworks Version: 6.15.0 Qt Version: 6.9.1 kscreen-doctor -o output: Output: 1 DP-1 enabled connected priority 1 DisplayPort Modes: 1:3840x2160@60*! 2:3840x2160@30 3:2560x1440@60 4:1920x1200@60 5:1920x1080@60 6:1920x1080@60 7:1920x1080@60 8:1600x1200@60 9:1680x1050@60 10:1600x900@60 11:1280x1024@60 12:1440x900@60 13:1280x800@60 14:1152x864@60 15:1280x720@60 16:1280x720@60 17:1280x720@60 18:1024x768@60 19:800x600@60 20:720x480@60 21:720x480@60 22:640x480@60 23:640x480@60 24:640x480@60 25:1600x1200@60 26:1280x1024@60 27:1024x768@60 28:2560x1600@60 29:1920x1200@60 30:3200x1800@60 31:2880x1620@60 32:2560x1440@60 33:1920x1080@60 34:1600x900@60 35:1368x768@60 36:1280x720@60 Geometry: 0,0 2560x1440 Scale: 1.5 Rotation: 1 Overscan: 0 Vrr: Always RgbRange: Full HDR: incapable Wide Color Gamut: incapable ICC profile: none Color profile source: sRGB Color power preference: prefer accuracy Brightness control: supported, set to 100% and dimming to 100%
Happens to me as well, on gpu RX 7600, display Dell Alienware AW2724DM. Video: https://www.youtube.com/watch?v=2dnet_HdzD8 Operating System: Arch Linux KDE Plasma Version: 6.4.0 KDE Frameworks Version: 6.15.0 Qt Version: 6.9.1 Kernel Version: 6.15.3-arch1-1 (64-bit) Graphics Platform: Wayland Processors: 12 × AMD Ryzen 5 3600X 6-Core Processor Memory: 16 GiB of RAM (15.5 GiB usable) Graphics Processor: AMD Radeon RX 7600 Manufacturer: Micro-Star International Co., Ltd Product Name: MS-7C02 System Version: 1.0 Output: 1 DP-3 a69bb880-4951-4d7f-bb70-6adfdde2571f enabled connected priority 1 DisplayPort replication source:0 Modes: 1:2560x1440@60! 2:2560x1440@165* 3:2560x1440@144 4:2560x1440@120 5:1920x1200@60 6:1920x1080@120 7:1920x1080@120 8:1920x1080@60 9:1920x1080@60 10:1920x1080@60 11:1920x1080@50 12:1920x1080@30 13:1920x1080@30 14:1920x1080@25 15:1920x1080@24 16:1920x1080@24 17:1600x1200@60 18:1680x1050@60 19:1600x900@60 20:1280x1024@75 21:1280x1024@60 22:1440x900@60 23:1280x800@60 24:1152x864@75 25:1280x720@60 26:1280x720@60 27:1280x720@50 28:1024x768@75 29:1024x768@60 30:800x600@75 31:800x600@60 32:720x576@50 33:720x480@60 34:720x480@60 35:720x480@60 36:720x480@60 37:640x480@75 38:640x480@60 39:640x480@60 40:640x480@60 41:720x400@70 42:1600x1200@165 43:1280x1024@165 44:1024x768@165 45:1920x1200@165 46:1280x800@165 47:1920x1080@165 48:1600x900@165 49:1368x768@60 50:1368x768@165 51:1280x720@165 Geometry: 0,0 2560x1440 Scale: 1 Rotation: 1 Overscan: 0 Vrr: Never RgbRange: Full HDR: disabled Wide Color Gamut: disabled ICC profile: none Color profile source: EDID Color power preference: prefer efficiency and performance Brightness control: supported, set to 100% and dimming to 100% DDC/CI: allowed Color resolution: 10 bits per color, range: [8; 16] bits per color Allow EDR: unsupported
I also see that on my RX 7700 XT. So basically this issue could be summarised to AMD RX 7000 GPUs being problematic. It could be a driver issue though. But I actually use the mainline kernel (6.16-r3 atm), so no expected fixes from that side.
(In reply to Hanabishi from comment #4) > I also see that on my RX 7700 XT. So basically this issue could be > summarised to AMD RX 7000 GPUs being problematic. > It could be a driver issue though. But I actually use the mainline kernel > (6.16-r3 atm), so no expected fixes from that side. Definitely not restricted to 7000 GPUs, just checked and it happens on my laptop as well. Lenovo IdeaPad Slim 5 16AKP10, AMD Ryzen AI 7 350 / AMD Radeon 860M Graphics, OLED Display. Doesn't happen on my intel laptop though, so this really may be an AMD driver issue.
Yep, it seems to be a driver issue of some kind. Because I faced the same artifacts in mpv's fullscreen mode using Vulkan renderer. Regardless of how Plasma is configured.
The information thus far indicates that the problem is in the Mesa graphics drivers. Please read https://docs.mesa3d.org/bugs.html and submit a bug report for the Mesa developers. Thanks!
I waited for stable 6.16 kernel to confirm it's still there and reported the problem upstream: https://gitlab.freedesktop.org/drm/amd/-/issues/4466
Thanks a lot!
I forgot to mention that I created this ticket: https://gitlab.freedesktop.org/mesa/mesa/-/issues/13502
Well, you probably misunderstood my messages. By driver I meant amdgpu kernel driver, not Mesa. Because there already was a similar report earlier (see BUG#501540 & https://gitlab.freedesktop.org/drm/amd/-/issues/4057), but for RDNA4 cards. I think we suffers from the same problem, just with less pronounced artifacts. But unfortunately that kernel fix for RDNA4 have not fixed it for us.