https://bugs.kde.org/show_bug.cgi?id=510736
Bug ID: 510736
Summary: Screen flickering in the bottom-right corner of Plasma
Classification: I don't know
Product: kde
Version First unspecified
Reported In:
Platform: Kubuntu
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
# plasma右下角屏幕闪烁/Screen flickering in the bottom-right corner of Plasma
**英文为机器翻译/The English text is machine-translated**
## 系统信息/System Information
### 关于此系统/About This System
``` text
Operating System: Kubuntu 25.10
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.17.0
Qt Version: 6.9.2
Kernel Version: 6.17.0-5-generic (64-bit)
Graphics Platform: Wayland
Processors: 24 × 13th Gen Intel® Core™ i7-13700KF
Memory: 32 GiB of RAM (31.2 GiB usable)
Graphics Processor: NVIDIA GeForce RTX 4070 Ti SUPER
Manufacturer: ASUS
```
### EDID（部分已省略）/EDID (partially omitted)
``` text
# card1-DP-1 #######################
Block 0, Base EDID:
EDID Structure Version & Revision: 1.4
Vendor & Product Identification:
Manufacturer: SAM
Model: 29376
Serial Number: 810244679 (0x304b5a47)
Model year: 2245
Basic Display Parameters & Features:
Digital display
Bits per primary color channel: 10
DisplayPort interface
Maximum image size: 70 cm x 40 cm
Gamma: 2.20
DPMS levels: Off
Supported color formats: RGB 4:4:4, YCrCb 4:4:4, YCrCb 4:2:2
First detailed timing includes the native pixel format and preferred
refresh rate
Color Characteristics:
Red : 0.6806, 0.3046
Green: 0.2724, 0.6660
Blue : 0.1552, 0.0556
White: 0.3134, 0.3291
Established Timings I & II:
DMT 0x04: 640x480 59.940476 Hz 4:3 31.469 kHz 25.175000 MHz
DMT 0x06: 640x480 75.000000 Hz 4:3 37.500 kHz 31.500000 MHz
DMT 0x09: 800x600 60.316541 Hz 4:3 37.879 kHz 40.000000 MHz
DMT 0x0a: 800x600 72.187572 Hz 4:3 48.077 kHz 50.000000 MHz
DMT 0x0b: 800x600 75.000000 Hz 4:3 46.875 kHz 49.500000 MHz
DMT 0x10: 1024x768 60.003840 Hz 4:3 48.363 kHz 65.000000 MHz
DMT 0x11: 1024x768 70.069359 Hz 4:3 56.476 kHz 75.000000 MHz
DMT 0x12: 1024x768 75.028582 Hz 4:3 60.023 kHz 78.750000 MHz
DMT 0x24: 1280x1024 75.024675 Hz 5:4 79.976 kHz 135.000000 MHz
Standard Timings:
DMT 0x55: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
DMT 0x1c: 1280x800 59.810326 Hz 16:10 49.702 kHz 83.500000 MHz
DMT 0x23: 1280x1024 60.019740 Hz 5:4 63.981 kHz 108.000000 MHz
DMT 0x2f: 1440x900 59.887445 Hz 16:10 55.935 kHz 106.500000 MHz
DMT 0x53: 1600x900 60.000000 Hz 16:9 60.000 kHz 108.000000 MHz
(RB)
DMT 0x3a: 1680x1050 59.954250 Hz 16:10 65.290 kHz 146.250000 MHz
DMT 0x15: 1152x864 75.000000 Hz 4:3 67.500 kHz 108.000000 MHz
Detailed Timing Descriptors:
DTD 1: 3840x2160 60.000000 Hz 16:9 135.000 kHz 594.000000 MHz
(697 mm x 392 mm)
Hfront 176 Hsync 88 Hback 296 Hpol P
Vfront 8 Vsync 10 Vback 72 Vpol P
Display Product Name: 'Odyssey G7'
Display Product Serial Number: 'HNBY300096'
Extension blocks: 2
Checksum: 0xa5
----------------
Block 1, CTA-861 Extension Block:
Revision: 3
Underscans IT Video Formats by default
Basic audio support
Supports YCbCr 4:4:4
Supports YCbCr 4:2:2
Native detailed modes: 0
Video Data Block:
VIC 97: 3840x2160 60.000000 Hz 16:9 135.000 kHz 594.000000 MHz
VIC 95: 3840x2160 30.000000 Hz 16:9 67.500 kHz 297.000000 MHz
VIC 16: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz
VIC 31: 1920x1080 50.000000 Hz 16:9 56.250 kHz 148.500000 MHz
VIC 63: 1920x1080 120.000000 Hz 16:9 135.000 kHz 297.000000 MHz
VIC 4: 1280x720 60.000000 Hz 16:9 45.000 kHz 74.250000 MHz
VIC 3: 720x480 59.940060 Hz 16:9 31.469 kHz 27.000000 MHz
VIC 118: 3840x2160 120.000000 Hz 16:9 270.000 kHz 1188.000000 MHz
Audio Data Block:
Linear PCM:
Max channels: 2
Supported sample rates (kHz): 48 44.1 32
Supported sample sizes (bits): 24 20 16
Speaker Allocation Data Block:
FL/FR - Front Left/Right
Colorimetry Data Block:
BT2020YCC
BT2020RGB
HDR Static Metadata Data Block:
Electro optical transfer functions:
Traditional gamma - SDR luminance range
SMPTE ST2084
Supported static metadata descriptors:
Static metadata type 1
Desired content max luminance: 139 (1015.241 cd/m^2)
Desired content max frame-average luminance: 90 (351.250 cd/m^2)
Detailed Timing Descriptors:
DTD 2: 2560x1440 59.950550 Hz 16:9 88.787 kHz 241.500000 MHz
(697 mm x 392 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 33 Vpol N
DTD 3: 2560x1440 119.997589 Hz 16:9 182.996 kHz 497.750000 MHz
(697 mm x 392 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 77 Vpol N
DTD 4: 1920x1080 60.000000 Hz 16:9 67.500 kHz 148.500000 MHz
(697 mm x 392 mm)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 4 Vsync 5 Vback 36 Vpol P
Checksum: 0xbf
----------------
Block 2, DisplayID Extension Block:
Version: 1.2
Display Product Type: Extension Section
Video Timing Modes Type 1 - Detailed Timings Data Block:
DTD: 3840x2160 120.000000 Hz 16:9 270.000 kHz 1188.000000 MHz
(aspect 16:9, no 3D stereo, preferred)
Hfront 176 Hsync 88 Hback 296 Hpol P
Vfront 8 Vsync 10 Vback 72 Vpol P
DTD: 3840x2160 165.000000 Hz 16:9 371.250 kHz 1559.250000 MHz
(aspect 16:9, no 3D stereo)
Hfront 148 Hsync 32 Hback 180 Hpol P
Vfront 3 Vsync 5 Vback 82 Vpol N
DTD: 2560x1440 164.982674 Hz 16:9 247.309 kHz 712.250000 MHz
(aspect 16:9, no 3D stereo)
Hfront 128 Hsync 32 Hback 160 Hpol P
Vfront 3 Vsync 5 Vback 51 Vpol N
DTD: 1920x1080 164.978699 Hz 16:9 186.591 kHz 410.500000 MHz
(aspect 16:9, no 3D stereo)
Hfront 108 Hsync 32 Hback 140 Hpol P
Vfront 3 Vsync 5 Vback 43 Vpol N
DTD: 1920x1080 120.000000 Hz 16:9 135.000 kHz 297.000000 MHz
(aspect 16:9, no 3D stereo)
Hfront 88 Hsync 44 Hback 148 Hpol P
Vfront 4 Vsync 5 Vback 36 Vpol P
Checksum: 0x90
----------------
Failures:
Block 0, Base EDID:
Display Range Limits: GTF is supported, but the display does not support
continuous frequencies.
EDID conformity: FAIL
```
## 显卡驱动（以下均可）/Graphics Driver (any of the following are acceptable)
``` text
nvidia-driver-580-open, (kernel modules provided by
linux-modules-nvidia-580-open-generic)
nvidia-driver-570-open, (kernel modules provided by
linux-modules-nvidia-570-open-generic)
nvidia-driver-580, (kernel modules provided by
linux-modules-nvidia-580-generic)
nvidia-driver-570, (kernel modules provided by
linux-modules-nvidia-570-generic)
nvidia-driver-580-server-open, (kernel modules provided by
linux-modules-nvidia-580-server-open-generic)
nvidia-driver-570-server-open, (kernel modules provided by
linux-modules-nvidia-570-server-open-generic)
nvidia-driver-580-server, (kernel modules provided by
linux-modules-nvidia-580-server-generic)
nvidia-driver-570-server, (kernel modules provided by
linux-modules-nvidia-570-server-generic)
```
## 问题描述与复现步骤
1. 使用以上设备和驱动安装相同的操作系统和桌面环境。
2. 使用 **3840x2160@165** 分辨率和刷新率 *（注意，其他显示模式不能复现）* ，打开HDR可以更好地复现。
3. **全屏** 显示应用程序，如firefox、kate，在firefox中全屏播放视频可以更好地复现。
4. 此时，位于右下角的日历、时钟、通知、音量等，有概率会使任务栏右下角闪烁。
5. 如果不能复现，可以重新启动再试。
## Problem Description and Reproduction Steps
1. Install the same operating system and desktop environment using the
aforementioned hardware and drivers.
2. Use a resolution and refresh rate of **3840x2160@165** *(note: the issue
cannot be reproduced with other display modes)*. Enabling HDR may help
reproduce the issue more reliably.
3. Run applications in **full-screen mode**, such as Firefox or Kate. Playing a
video in full-screen mode in Firefox can better trigger the issue.
4. At this point, the calendar, clock, notifications, volume control, and other
elements in the bottom-right corner of the taskbar may intermittently cause
flickering in that area.
5. If the issue cannot be reproduced, try rebooting the system and repeating
the steps.
## 不能复现的情况
1. 3840x2160@165以外的分辨率和刷新率。
2. 使用开源驱动程序。
3. 不是全屏使用应用程序。
## Conditions Under Which the Issue Cannot Be Reproduced
1. Any resolution and refresh rate other than 3840x2160@165.
2. Using open-source graphics drivers.
3. Running applications in non-full-screen mode.
## 结语
以上是全部信息，希望大家可以解答一下是什么情况，是否需要报告bug。
## Conclusion
The above contains all available information. We hope someone can help identify
the cause of this behavior and advise whether a bug report should be filed.
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