Hello, upgraded from ubuntu 23.10 to 24.04, when at the first time I saw flickering.
some attempts: 1) sudo gedit /etc/modprobe.d/i915.conf options i915 enable_psr=1 (0 value was what I found there) 2) sudo gedit /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="intel_pstate=guided quiet splash options i915 enable_psr=0" this resulted in unknown parameter: 3) sudo gedit /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="intel_pstate=guided quiet splash options i915.enable_rc6" this is what (it seems up to now that) worked: 4) sudo gedit /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="intel_pstate=guided quiet splash intel_idle.max_cstate=1" for attempts 2-4 grub was updated and then rebooted. Regards! specs: ## Hardware Information: - **Processor:** Intel® Core™ i5-7200U × 4 - **Graphics:** Intel® HD Graphics 620 (KBL GT2) ## Software Information: - **OS Name:** Ubuntu 24.04 LTS - **Windowing System:** Wayland - **Kernel Version:** Linux 6.8.0-39-generic -- 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/2062951 Title: Random flickering with Intel i915 (Gen9 GPUs) on Linux 6.8 (Ubuntu 24.04) Status in linux package in Ubuntu: Confirmed Bug description: 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/ubuntu/+source/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
