Public bug reported: Random flickering of the screen when cursor is in the lower part of the screen. The flickering stops when mouse is again moved.
This problem happens on my two laptops (CoffeeLake and WhiskeyLake), details below. Adding intel_iommu=igfx_off to kernel command line solves this problem. Bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2062951/+index?comments=all solves the problem for some architectures, but it is now closed. Hence I opened new bug report. Laptop 1: $ lspci -nnk | grep -A3 VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation CoffeeLake-H GT2 [UHD Graphics 630] [8086:3e9b] DeviceName: Onboard IGD Subsystem: Hewlett-Packard Company CoffeeLake-H GT2 [UHD Graphics 630] [103c:8427] Kernel driver in use: i915 -- 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP107GLM [Quadro P1000 Mobile] [10de:1cbb] (rev a1) Subsystem: Hewlett-Packard Company GP107GLM [Quadro P1000 Mobile] [103c:8427] Kernel driver in use: nvidia Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia # System Details Report --- ## Report details - **Date generated:** 2025-11-24 21:29:40 ## Hardware Information: - **Hardware Model:** HP HP ZBook Studio G5 - **Memory:** 16.0 GiB - **Processor:** Intel® Core™ i7-8750H × 12 - **Graphics:** Intel® UHD Graphics 630 (CFL GT2) - **Graphics 1:** Quadro P1000 - **Disk Capacity:** 512.1 GB ## Software Information: - **Firmware Version:** Q71 Ver. 01.32.00 - **OS Name:** Ubuntu 24.04.3 LTS - **OS Build:** (null) - **OS Type:** 64-bit - **GNOME Version:** 46 - **Windowing System:** X11 - **Kernel Version:** Linux 6.8.0-88-generic Laptop 2: $ lspci -nnk | grep -A3 VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation WhiskeyLake-U GT2 [UHD Graphics 620] [8086:3ea0] (rev 02) Subsystem: Lenovo WhiskeyLake-U GT2 [UHD Graphics 620] [17aa:2281] Kernel driver in use: i915 Kernel modules: i915 # System Details Report --- ## Report details - **Date generated:** 2025-11-26 14:28:35 ## Hardware Information: - **Hardware Model:** Lenovo ThinkPad P53s - **Memory:** 40.0 GiB - **Processor:** Intel® Core™ i7-8565U × 8 - **Graphics:** Intel® UHD Graphics 620 (WHL GT2) - **Graphics 1:** NV138 - **Disk Capacity:** 1.0 TB ## Software Information: - **Firmware Version:** N2IETA6W (1.84 ) - **OS Name:** Ubuntu 24.04.3 LTS - **OS Build:** (null) - **OS Type:** 64-bit - **GNOME Version:** 46 - **Windowing System:** X11 - **Kernel Version:** Linux 6.8.0-88-generic ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2136958 Title: Random flickering with Intel i915 (CoffeeLake and WhiskeyLake) on Linux 6.8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2136958/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
