I tried to use both kernels in my Latitude 5440: linux-image-6.8.0-51-generic linux-image-6.11.0-1010-oem
Both have the flickering problem. The option intel_iommu=igfx_off make the flickering less often but do not solve the problem. intel_idle.max_cstate=2 i915.enable_dc=0 make it worse. lspci 0000:00:00.0 Host bridge: Intel Corporation Raptor Lake-P/U 2p+8e cores Host Bridge/DRAM Controller (rev 01) 0000:00:02.0 VGA compatible controller: Intel Corporation Raptor Lake-P [UHD Graphics] (rev 04) 0000:00:04.0 Signal processing controller: Intel Corporation Raptor Lake Dynamic Platform and Thermal Framework Processor Participant (rev 01) 0000:00:06.0 System peripheral: Intel Corporation RST VMD Managed Controller 0000:00:07.0 PCI bridge: Intel Corporation Raptor Lake-P Thunderbolt 4 PCI Express Root Port #0 (rev 01) 0000:00:07.1 PCI bridge: Intel Corporation Device a73f (rev 01) 0000:00:08.0 System peripheral: Intel Corporation GNA Scoring Accelerator module (rev 01) 0000:00:0a.0 Signal processing controller: Intel Corporation Raptor Lake Crashlog and Telemetry (rev 01) 0000:00:0d.0 USB controller: Intel Corporation Raptor Lake-P Thunderbolt 4 USB Controller (rev 01) 0000:00:0d.2 USB controller: Intel Corporation Raptor Lake-P Thunderbolt 4 NHI #0 (rev 01) 0000:00:0e.0 RAID bus controller: Intel Corporation Volume Management Device NVMe RAID Controller Intel Corporation 0000:00:12.0 Serial controller: Intel Corporation Alder Lake-P Integrated Sensor Hub (rev 01) 0000:00:14.0 USB controller: Intel Corporation Alder Lake PCH USB 3.2 xHCI Host Controller (rev 01) 0000:00:14.2 RAM memory: Intel Corporation Alder Lake PCH Shared SRAM (rev 01) 0000:00:14.3 Network controller: Intel Corporation Raptor Lake PCH CNVi WiFi (rev 01) 0000:00:15.0 Serial bus controller: Intel Corporation Alder Lake PCH Serial IO I2C Controller #0 (rev 01) 0000:00:15.1 Serial bus controller: Intel Corporation Alder Lake PCH Serial IO I2C Controller #1 (rev 01) 0000:00:16.0 Communication controller: Intel Corporation Alder Lake PCH HECI Controller (rev 01) 0000:00:1f.0 ISA bridge: Intel Corporation Raptor Lake LPC/eSPI Controller (rev 01) 0000:00:1f.3 Audio device: Intel Corporation Raptor Lake-P/U/H cAVS (rev 01) 0000:00:1f.4 SMBus: Intel Corporation Alder Lake PCH-P SMBus Host Controller (rev 01) 0000:00:1f.5 Serial bus controller: Intel Corporation Alder Lake-P PCH SPI Controller (rev 01) 0000:00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (23) I219-LM (rev 01) 10000:e0:06.0 PCI bridge: Intel Corporation Raptor Lake PCIe 4.0 Graphics Port (rev 01) 10000:e1:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller PM9B1 (DRAM-less) (rev 02) lsmod Module Size Used by ccm 20480 6 rfcomm 102400 4 snd_seq_dummy 12288 0 snd_hrtimer 12288 1 qrtr 53248 2 cmac 12288 3 algif_hash 16384 1 algif_skcipher 16384 1 af_alg 32768 6 algif_hash,algif_skcipher bnep 32768 2 snd_hda_codec_hdmi 98304 1 xe 3141632 0 snd_hda_codec_realtek 212992 1 snd_hda_codec_generic 122880 1 snd_hda_codec_realtek snd_hda_scodec_component 20480 1 snd_hda_codec_realtek drm_gpuvm 45056 1 xe drm_exec 12288 2 drm_gpuvm,xe gpu_sched 61440 1 xe drm_suballoc_helper 20480 1 xe drm_ttm_helper 16384 1 xe snd_sof_pci_intel_tgl 12288 0 snd_sof_pci_intel_cnl 20480 1 snd_sof_pci_intel_tgl snd_sof_intel_hda_generic 36864 2 snd_sof_pci_intel_tgl,snd_sof_pci_intel_cnl soundwire_intel 77824 1 snd_sof_intel_hda_generic soundwire_cadence 40960 1 soundwire_intel snd_sof_intel_hda_common 184320 3 snd_sof_intel_hda_generic,snd_sof_pci_intel_tgl,snd_sof_pci_intel_cnl snd_sof_intel_hda_mlink 45056 3 soundwire_intel,snd_sof_intel_hda_common,snd_sof_intel_hda_generic snd_sof_intel_hda 24576 2 snd_sof_intel_hda_common,snd_sof_intel_hda_generic snd_sof_pci 24576 3 snd_sof_intel_hda_generic,snd_sof_pci_intel_tgl,snd_sof_pci_intel_cnl snd_sof_xtensa_dsp 12288 1 snd_sof_intel_hda_generic snd_sof 385024 5 snd_sof_pci,snd_sof_intel_hda_common,snd_sof_intel_hda_generic,snd_sof_intel_hda,snd_sof_pci_intel_cnl dell_pc 12288 0 platform_profile 12288 1 dell_pc snd_sof_utils 16384 1 snd_sof snd_soc_hdac_hda 24576 1 snd_sof_intel_hda_common snd_ctl_led 24576 0 snd_soc_acpi_intel_match 114688 3 snd_sof_intel_hda_generic,snd_sof_pci_intel_tgl,snd_sof_pci_intel_cnl soundwire_generic_allocation 12288 1 soundwire_intel snd_soc_acpi 16384 2 snd_soc_acpi_intel_match,snd_sof_intel_hda_generic soundwire_bus 122880 3 soundwire_intel,soundwire_generic_allocation,soundwire_cadence snd_soc_avs 196608 0 snd_soc_hda_codec 24576 1 snd_soc_avs snd_hda_ext_core 32768 6 snd_soc_avs,snd_soc_hda_codec,snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_sof_intel_hda_mlink,snd_sof_intel_hda snd_soc_core 434176 6 snd_soc_avs,snd_soc_hda_codec,soundwire_intel,snd_sof,snd_sof_intel_hda_common,snd_soc_hdac_hda snd_compress 28672 2 snd_soc_avs,snd_soc_core ac97_bus 12288 1 snd_soc_core binfmt_misc 24576 1 snd_pcm_dmaengine 16384 1 snd_soc_core snd_hda_intel 61440 1 intel_uncore_frequency 12288 0 intel_uncore_frequency_common 16384 1 intel_uncore_frequency snd_intel_dspcfg 45056 5 snd_soc_avs,snd_hda_intel,snd_sof,snd_sof_intel_hda_common,snd_sof_intel_hda_generic snd_intel_sdw_acpi 16384 2 snd_intel_dspcfg,snd_sof_intel_hda_generic snd_hda_codec 204800 8 snd_hda_codec_generic,snd_soc_avs,snd_hda_codec_hdmi,snd_soc_hda_codec,snd_hda_intel,snd_hda_codec_realtek,snd_soc_hdac_hda,snd_sof_intel_hda snd_usb_audio 524288 2 nls_iso8859_1 12288 1 dell_rbtn 20480 0 snd_hda_core 143360 11 snd_hda_codec_generic,snd_soc_avs,snd_hda_codec_hdmi,snd_soc_hda_codec,snd_hda_intel,snd_hda_ext_core,snd_hda_codec,snd_hda_codec_realtek,snd_sof_intel_hda_common,snd_soc_hdac_hda,snd_sof_intel_hda snd_usbmidi_lib 53248 1 snd_usb_audio snd_ump 45056 1 snd_usb_audio snd_hwdep 20480 2 snd_usb_audio,snd_hda_codec iwlmvm 909312 0 snd_pcm 196608 13 snd_soc_avs,snd_hda_codec_hdmi,snd_hda_intel,snd_usb_audio,snd_hda_codec,soundwire_intel,snd_sof,snd_sof_intel_hda_common,snd_compress,snd_soc_core,snd_sof_utils,snd_hda_core,snd_pcm_dmaengine cmdlinepart 16384 0 x86_pkg_temp_thermal 20480 0 intel_powerclamp 24576 0 spi_nor 163840 0 snd_seq_midi 24576 0 coretemp 24576 0 dell_laptop 32768 0 mei_hdcp 28672 0 mei_pxp 16384 0 ee1004 16384 0 mtd 98304 4 spi_nor,cmdlinepart mac80211 1757184 1 iwlmvm kvm_intel 487424 0 snd_seq_midi_event 16384 1 snd_seq_midi uvcvideo 143360 0 snd_rawmidi 57344 3 snd_seq_midi,snd_usbmidi_lib,snd_ump intel_rapl_msr 20480 0 i915 4558848 10 libarc4 12288 1 mac80211 dell_wmi 28672 1 dell_laptop kvm 1421312 1 kvm_intel btusb 69632 0 snd_seq 122880 9 snd_seq_midi,snd_seq_midi_event,snd_seq_dummy videobuf2_vmalloc 20480 1 uvcvideo uvc 12288 1 uvcvideo iwlwifi 634880 1 iwlmvm btrtl 36864 1 btusb dell_smbios 36864 3 dell_wmi,dell_pc,dell_laptop hid_sensor_custom_intel_hinge 12288 0 hid_sensor_als 16384 1 hid_sensor_accel_3d 16384 0 btintel 69632 1 btusb videobuf2_memops 16384 1 videobuf2_vmalloc videobuf2_v4l2 36864 1 uvcvideo btbcm 24576 1 btusb dcdbas 20480 1 dell_smbios hid_sensor_trigger 20480 6 hid_sensor_custom_intel_hinge,hid_sensor_als,hid_sensor_accel_3d snd_seq_device 16384 4 snd_seq,snd_seq_midi,snd_ump,snd_rawmidi rapl 20480 0 intel_cstate 24576 0 videodev 360448 2 videobuf2_v4l2,uvcvideo dell_wmi_ddv 24576 0 dell_wmi_sysman 49152 0 dell_smm_hwmon 36864 0 btmtk 36864 1 btusb drm_buddy 24576 2 xe,i915 processor_thermal_device_pci 16384 0 industrialio_triggered_buffer 12288 1 hid_sensor_trigger firmware_attributes_class 12288 1 dell_wmi_sysman i2c_i801 36864 0 dell_wmi_descriptor 20480 2 dell_wmi,dell_smbios wmi_bmof 12288 0 snd_timer 49152 3 snd_seq,snd_hrtimer,snd_pcm videobuf2_common 86016 4 videobuf2_vmalloc,videobuf2_v4l2,uvcvideo,videobuf2_memops mei_me 53248 2 kfifo_buf 12288 1 industrialio_triggered_buffer processor_thermal_device 20480 1 processor_thermal_device_pci ttm 110592 3 drm_ttm_helper,xe,i915 i2c_mux 16384 1 i2c_i801 hid_sensor_iio_common 24576 4 hid_sensor_trigger,hid_sensor_custom_intel_hinge,hid_sensor_als,hid_sensor_accel_3d spi_intel_pci 12288 0 cfg80211 1351680 3 iwlmvm,iwlwifi,mac80211 mei 172032 5 mei_hdcp,mei_pxp,mei_me spi_intel 32768 1 spi_intel_pci i2c_smbus 16384 1 i2c_i801 mc 81920 5 videodev,snd_usb_audio,videobuf2_v4l2,uvcvideo,videobuf2_common snd 143360 26 snd_ctl_led,snd_hda_codec_generic,snd_seq,snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_usb_audio,snd_usbmidi_lib,snd_hda_codec,snd_hda_codec_realtek,snd_sof,snd_timer,snd_compress,snd_soc_core,snd_ump,snd_pcm,snd_rawmidi industrialio 135168 7 industrialio_triggered_buffer,hid_sensor_trigger,hid_sensor_custom_intel_hinge,kfifo_buf,hid_sensor_als,hid_sensor_accel_3d processor_thermal_wt_hint 16384 2 processor_thermal_device_pci,processor_thermal_device drm_display_helper 278528 2 xe,i915 bluetooth 1007616 34 btrtl,btmtk,btintel,btbcm,bnep,btusb,rfcomm processor_thermal_rfim 36864 1 processor_thermal_device soundcore 16384 2 snd_ctl_led,snd processor_thermal_rapl 16384 1 processor_thermal_device cec 94208 3 drm_display_helper,xe,i915 intel_rapl_common 53248 2 intel_rapl_msr,processor_thermal_rapl rc_core 73728 1 cec processor_thermal_wt_req 12288 1 processor_thermal_device processor_thermal_power_floor 12288 2 processor_thermal_device_pci,processor_thermal_device i2c_algo_bit 16384 2 xe,i915 processor_thermal_mbox 12288 4 processor_thermal_power_floor,processor_thermal_wt_req,processor_thermal_rfim,processor_thermal_wt_hint igen6_edac 24576 0 int3403_thermal 16384 0 int340x_thermal_zone 16384 2 int3403_thermal,processor_thermal_device intel_pmc_core 122880 0 intel_hid 28672 0 intel_vsec 20480 1 intel_pmc_core sparse_keymap 12288 2 intel_hid,dell_wmi int3400_thermal 24576 0 dptf_pch_fivr 12288 0 pmt_telemetry 16384 1 intel_pmc_core acpi_tad 20480 0 pmt_class 16384 1 pmt_telemetry acpi_thermal_rel 20480 1 int3400_thermal acpi_pad 184320 0 input_leds 12288 0 joydev 32768 0 mac_hid 12288 0 serio_raw 20480 0 sch_fq_codel 24576 2 msr 12288 0 parport_pc 53248 0 ppdev 24576 0 lp 28672 0 parport 73728 3 parport_pc,lp,ppdev efi_pstore 12288 0 nfnetlink 20480 1 dmi_sysfs 24576 0 ip_tables 32768 0 x_tables 65536 1 ip_tables autofs4 57344 2 dm_crypt 65536 1 hid_sensor_custom 28672 0 hid_sensor_hub 28672 6 hid_sensor_trigger,hid_sensor_iio_common,hid_sensor_custom_intel_hinge,hid_sensor_als,hid_sensor_accel_3d,hid_sensor_custom intel_ishtp_hid 32768 0 usbhid 77824 0 nvme 61440 3 nvme_core 221184 4 nvme nvme_auth 28672 1 nvme_core hid_multitouch 36864 0 ahci 49152 0 hid_generic 12288 0 libahci 53248 1 ahci crct10dif_pclmul 12288 1 crc32_pclmul 12288 0 polyval_clmulni 12288 0 polyval_generic 12288 1 polyval_clmulni ghash_clmulni_intel 16384 0 sha256_ssse3 32768 0 video 77824 4 dell_wmi,dell_laptop,xe,i915 sha1_ssse3 32768 0 psmouse 217088 0 intel_lpss_pci 24576 0 intel_lpss 12288 1 intel_lpss_pci ucsi_acpi 12288 0 e1000e 356352 0 intel_ish_ipc 32768 0 i2c_hid_acpi 12288 0 thunderbolt 536576 0 idma64 20480 0 typec_ucsi 61440 1 ucsi_acpi xhci_pci 24576 0 intel_ishtp 73728 2 intel_ishtp_hid,intel_ish_ipc i2c_hid 40960 1 i2c_hid_acpi vmd 28672 0 xhci_pci_renesas 20480 1 xhci_pci typec 110592 1 typec_ucsi hid 262144 6 i2c_hid,usbhid,hid_multitouch,hid_sensor_hub,intel_ishtp_hid,hid_generic wmi 28672 8 dell_wmi_sysman,video,dell_wmi_ddv,dell_wmi,wmi_bmof,dell_smm_hwmon,dell_smbios,dell_wmi_descriptor pinctrl_tigerlake 28672 1 aesni_intel 118784 10 crypto_simd 16384 1 aesni_intel cryptd 24576 4 crypto_simd,ghash_clmulni_intel Anyone has any other idea to mitigate this problem? -- 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
