Thanks, before testing I disabled the intel_iommu= workaround, and this kernel does indeed fix the flicker issue for me.
For reference this is my hardware: $ lspci -nnk | grep -A3 VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) DeviceName: Onboard IGD Subsystem: Dell UHD Graphics 620 [1028:081c] Kernel driver in use: i915 The 6.8.0-48 kernel had not fixed the flicker issue for me, but this one does. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/2086587 Title: Random flickering with Intel i915 (Comet Lake and Kaby Lake) on Linux 6.8 Status in linux package in Ubuntu: In Progress Status in linux source package in Jammy: Invalid Status in linux source package in Noble: In Progress Status in linux source package in Oracular: In Progress Status in linux source package in Plucky: In Progress Bug description: [Impact] The flickering predominantly occurs when the mouse cursor is in the bottom quarter of the screen and stops when the cursor leaves this area. Extensive testing across various kernel versions revealed that the issue became apparent from kernel version 6.8.0 onward, correlating with the mentioned configuration changes, CONFIG_INTEL_IOMMU_DEFAULT_ON and CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON. The problem persists in the latest drm tip. [Fix] As an immediate workaround, adding 'intel_iommu=igfx_off' to the kernel command line has been found to effectively eliminate the flickering issue. This patch proposes the same behavior as 'intel_iommu=igfx_off' and apply the rule to all Intel SKL GPU IDs. [Test] 1. Boot up to desktop with 6.8.0-x kernels 2. Moving cursor around the desktop 3. There should be no flicker while cursor is moving [Where problems could occur] For virtualized environments using hardware-assisted virtualization for graphics (such as VFIO or mediated pass-through), disabling IOMMU for graphics could either disable these features or reduce their security and efficiency. Usually, users pass the 'intel_iommu=on' by themselves when they are using related features. So, the impact of this change is minimal. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2086587/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
