My suggestion is to try 24.10 and use kernel 6.11. That fixed all my problems with flicker.
On Fri, Dec 27, 2024, 7:40 AM Leo Vleeshouwers <2062...@bugs.launchpad.net> wrote: > I'm experiencing severe flickering when the mouse cursor is in the > bottom quarter of the screen. It stops when I move the cursor. > > The proposed workarounds do not work for me. > I tried all suggested alterations to grub line GRUB_CMDLINE_LINUX_DEFAULT. > No luck. > > Upgrade to 24.04 did not solve the problem. > > $ uname -r > > 6.8.0-49-generic > > $ lspci -nnk | grep -A3 VGA > > 00:02.0 VGA compatible controller [0300]: Intel Corporation CoffeeLake-H > GT2 [UHD Graphics 630] [8086:3e9b] > Subsystem: Acer Incorporated [ALI] CoffeeLake-H GT2 [UHD Graphics > 630] [1025:125f] > Kernel driver in use: i915 > Kernel modules: i915 > -- > 01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP107M > [GeForce GTX 1050 Mobile] [10de:1c8d] (rev a1) > Subsystem: Acer Incorporated [ALI] GP107M [GeForce GTX 1050 > Mobile] [1025:1261] > Kernel driver in use: nvidia > Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia > > -- > You received this bug notification because you are subscribed to a > duplicate bug report (2080588). > https://bugs.launchpad.net/bugs/2062951 > > Title: > Random flickering with Intel i915 (Gen4+ GPUs) on Linux > > Status in Linux: > New > Status in linux package in Ubuntu: > Fix Released > Status in linux-hwe-6.8 package in Ubuntu: > Confirmed > Status in linux source package in Jammy: > Confirmed > Status in linux-hwe-6.8 source package in Jammy: > Fix Released > Status in linux source package in Noble: > Fix Released > Status in linux-hwe-6.8 source package in Noble: > Confirmed > Status in linux source package in Oracular: > Fix Released > Status in linux-hwe-6.8 source package in Oracular: > Confirmed > > Bug description: > SRU Justification > > [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. > > =========== > > After migrating Mantic 23.10 install to Linux 6.8.0, I am experiencing > heavy flickering at random. > It happens after a moderate to heavy on screen activity like window > switching, scrolling etc. > It never happens when playing video or when there is no interaction > using keyboard/pointer. > > It tend to happen when the mouse cursor is in the bottom quarter of the > screen and stops immediately when the cursor leaves that screen region. > Around the same time the following appears in kernel log: > kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun > > Happens on both X11 and Wayland on both KDE plasma and Mate (though > less). > > I first encountered the issue with Linux 6.8.0-11 and it still happens > with Ubunutu's 6.8.0-28 and Mainline 6.8.7. > Kernels 6.6, 6.5, 6.1 and older did not have that issue. > > Hardware is: Dell XPS 9350, Vendor Intel, Driver i915, Skylake GT2 [HD > Graphics 520] > Software: Ubuntu 23.10, KDE Plasma 5.27.10 / Mate 1.26 > > Attaching kernel log for 6.8.0-28 > > To manage notifications about this bug go to: > https://bugs.launchpad.net/linux/+bug/2062951/+subscriptions > > -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-hwe-6.8 in Ubuntu. https://bugs.launchpad.net/bugs/2062951 Title: Random flickering with Intel i915 (Gen4+ GPUs) on Linux Status in Linux: New Status in linux package in Ubuntu: Fix Released Status in linux-hwe-6.8 package in Ubuntu: Confirmed Status in linux source package in Jammy: Confirmed Status in linux-hwe-6.8 source package in Jammy: Fix Released Status in linux source package in Noble: Fix Released Status in linux-hwe-6.8 source package in Noble: Confirmed Status in linux source package in Oracular: Fix Released Status in linux-hwe-6.8 source package in Oracular: Confirmed Bug description: SRU Justification [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. =========== After migrating Mantic 23.10 install to Linux 6.8.0, I am experiencing heavy flickering at random. It happens after a moderate to heavy on screen activity like window switching, scrolling etc. It never happens when playing video or when there is no interaction using keyboard/pointer. It tend to happen when the mouse cursor is in the bottom quarter of the screen and stops immediately when the cursor leaves that screen region. Around the same time the following appears in kernel log: kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun Happens on both X11 and Wayland on both KDE plasma and Mate (though less). I first encountered the issue with Linux 6.8.0-11 and it still happens with Ubunutu's 6.8.0-28 and Mainline 6.8.7. Kernels 6.6, 6.5, 6.1 and older did not have that issue. Hardware is: Dell XPS 9350, Vendor Intel, Driver i915, Skylake GT2 [HD Graphics 520] Software: Ubuntu 23.10, KDE Plasma 5.27.10 / Mate 1.26 Attaching kernel log for 6.8.0-28 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/2062951/+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
