** Description changed: I am trying flickerfree boot in 19.10 [1], but find it actually flickers - part way through. The flicker occurs seemingly during kernel startup - since my peripherals are lit up before the problem occurs. + part way through: + + 1. BIOS logo on a black background. + 2. Display mode resets, no image on a black background briefly. + 3. BIOS logo on a black background. + + The flicker occurs seemingly during kernel startup since my peripherals + are lit up before the problem occurs. Suspecting this might be related to FB handover: - [ 2.751028] fb0: switching to inteldrmfb from EFI VGA + [ 2.751028] fb0: switching to inteldrmfb from EFI VGA I tried disabling that with a big hammer: - i915.modeset=0 + i915.modeset=0 so it stays in efifb, and that works -- no more flickering, providing I don't let i915 take over the framebuffer. [1] https://discourse.ubuntu.com/t/testing-flickerfree-boot/11854 ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: linux-image-5.2.0-8-generic 5.2.0-8.9 ProcVersionSignature: Ubuntu 5.2.0-8.9-generic 5.2.0 Uname: Linux 5.2.0-8-generic x86_64 ApportVersion: 2.20.11-0ubuntu5 Architecture: amd64 AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D2', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D9p', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: Date: Wed Jul 17 16:34:36 2019 InstallationDate: Installed on 2019-05-02 (76 days ago) InstallationMedia: Ubuntu 19.10 "Eoan EANIMAL" - Alpha amd64 (20190501) MachineType: LENOVO 10M7CTO1WW ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.2.0-8-generic root=UUID=9bfb5f01-bdd4-4854-bfce-1c28e2f2f3bc ro quiet splash i915.fastboot=1 vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: - linux-restricted-modules-5.2.0-8-generic N/A - linux-backports-modules-5.2.0-8-generic N/A - linux-firmware 1.180 + linux-restricted-modules-5.2.0-8-generic N/A + linux-backports-modules-5.2.0-8-generic N/A + linux-firmware 1.180 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/06/2018 dmi.bios.vendor: LENOVO dmi.bios.version: M16KT47A dmi.board.name: 3102 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN 3259627060530 dmi.chassis.type: 3 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrM16KT47A:bd02/06/2018:svnLENOVO:pn10M7CTO1WW:pvrThinkCentreM710s:rvnLENOVO:rn3102:rvrSDK0J40709WIN3259627060530:cvnLENOVO:ct3:cvrNone: dmi.product.family: ThinkCentre M710s dmi.product.name: 10M7CTO1WW dmi.product.sku: LENOVO_MT_10M7_BU_Think_FM_ThinkCentre M710s dmi.product.version: ThinkCentre M710s dmi.sys.vendor: LENOVO
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1836858 Title: i915: Display flickers during "flickerfree" boot (BIOS logo on a black background) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1836858/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
