**Issue details:** Whenever I install nvidia drivers on my issue. 1. The icon-only Task manager animations are super fast, not smooth. 2. When I boot my PC, CPU usage is 100%! 3. When I boot my PC, the kde boot screen flashes several times and loading wheel animation is super fast not smooth. Reproducibility: It happens always. **Related Issues:** It might relate to these, but I am not sure. (Listed in decreasing order of relevance.): 1. https://github.com/psi-im/psi/issues/249#issuecomment-301460795 2. https://bugs.kde.org/show_bug.cgi?id=288065 3. https://devtalk.nvidia.com/default/topic/571813/linux/nvidia-100-cpu-usage-pls-help-me-it-is-very-important-/ **Hardware details:** inxi -F System: Host: neon Kernel: 4.8.0-51-generic x86_64 (64 bit) Desktop: KDE Plasma 5.9.5 Distro: neon 16.04 xenial Machine: System: HP (portable) product: HP Pavilion Notebook v: Type1ProductConfigId Mobo: HP model: 80A4 v: 91.1D Bios: Insyde v: F.79 date: 04/14/2016 CPU: Dual core Intel Core i7-6500U (-HT-MCP-) cache: 4096 KB clock speeds: max: 3100 MHz 1: 499 MHz 2: 499 MHz 3: 499 MHz 4: 499 MHz Graphics: Card-1: Intel Sky Lake Integrated Graphics Card-2: NVIDIA GM108M [GeForce 940M] Display Server: X.Org 1.18.4 driver: nvidia Resolution: 1920x1080@59.93hz GLX Renderer: GeForce 940M/PCIe/SSE2 GLX Version: 4.5.0 NVIDIA 381.22 Audio: Card Intel Sunrise Point-LP HD Audio driver: snd_hda_intel Sound: ALSA v: k4.8.0-51-generic Network: Card-1: Realtek RTL8723BE PCIe Wireless Network Adapter driver: rtl8723be IF: wlo1 state: up mac: 68:14:01:23:d3:83 Card-2: Realtek RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller driver: r8169 IF: eno1 state: down mac: 70:5a:0f:25:69:96 Drives: HDD Total Size: 500.1GB (72.3% used) ID-1: /dev/sda model: Samsung_SSD_850 size: 500.1GB Partition: ID-1: / size: 443G used: 322G (77%) fs: ext4 dev: /dev/sda2 ID-2: swap-1 size: 17.01GB used: 0.00GB (0%) fs: swap dev: /dev/sda3 RAID: No RAID devices: /proc/mdstat, md_mod kernel module present Sensors: System Temperatures: cpu: 40.5C mobo: N/A gpu: 43C Fan Speeds (in rpm): cpu: N/A Info: Processes: 276 Uptime: 4:57 Memory: 5796.1/15885.7MB Client: Shell (fish) inxi: 2.2.35 **Nvidia-drivers I use(installed using ubuntu-drivers autoinstall):** sudo dpkg -l | grep nvidia ii nvidia-381 381.22-0ubuntu0~gpu16.04.2 amd64 NVIDIA binary driver - version 381.22 ii nvidia-opencl-icd-381 381.22-0ubuntu0~gpu16.04.2 amd64 NVIDIA OpenCL ICD ii nvidia-prime 0.8.2 amd64 Tools to enable NVIDIA's Prime ii nvidia-settings 381.22-0ubuntu0~gpu16.04.1 amd64 Tool for configuring the NVIDIA graphics driver
Video showing the issue: https://vimeo.com/217543616 0:03-0:04- Kde boot screen animation rotating wheel not smooth, too fast. 0:05-0:06- Screen flasjes for no reason. 0:35 - High CPU on CPU 2 usage 92% 0:43 -High CU usage on graph 0:55 onwards icon-manager fast not smooth animation. I would like to add the 100% CPU usage happens from time to time. That is, even after startup.
I have the same problem. I am using PRIME with 00:02.0 VGA compatible controller: Intel Corporation HD Graphics 530 (rev 06) 01:00.0 3D controller: NVIDIA Corporation GM206M [GeForce GTX 965M] (rev a1) After enabling NVIDIA kernel mode setting by adding nvidia-drm.modeset=1 to kernel parameter, the problem is solved. Some information: OS: Arch Linux Kernel: x86_64 Linux 4.11.9-1-ARCH DE: KDE 5.35.0 / Plasma 5.10.3 CPU: Intel Core i7-6700HQ GPU: GeForce GTX 965M
Can both of you list your Qt versions please.
Please reset the status to unconfirmed when you reply.
Qt: 5.9.1 nvidia: 381.22 xf86-video-intel: 1:2.99.917+777+g6babcf15
Seems that I do not have privileges change the status.
Thanks for the update; changing status.
Can you try closing plasmashell (kquitapp5 plasmashell) and reporting on both the following: QSG_FIXED_ANIMATION_STEP=yes plasmashell QT_QUICK_BACKEND=software plasmashell
Sorry that I switched to Intel graphics card due to hot summer, and I switched to i3wm as well. I can not test your solutions right now.
Then we can't continue debugging this. Closing.