Having the same issue with external monitor occasional flicker. Moving the mouse stops the flicker when it occurs. Happens every 15 to 30 minutes.
Adding intel_iommu=igfx_off to /etc/default/grub resolved the issue for me too. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=igfx_off" VGA compatible controller: Intel Corporation Skylake GT2 [HD Graphics 520] (rev 07) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
