It's not up to me... You'll need to seek guidance and a code review from kernel developers.
-- 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/1838443 Title: No flicker free boot since Ignoring BGRT: invalid version 0 (expected 1) Status in linux package in Ubuntu: Confirmed Bug description: On eoan dev here: Flicker free booting doesn't work since I get: Ignoring BGRT: invalid version 0 (expected 1) on dmesg on my Thinkpad x230t i7-3520M (Ivy Bridge). Second, if I add: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.fastboot=1" to /etc/default/grub then it doesn't show plymouth but displays the text Ubuntu loading screen and I need to press ALT+F1 so GDM will show up (see video: [1]). If I press escape while it is displaying text Ubuntu loading, it loads plymouth (see video: [2]) and shows the spinner (no lenovo word) and I don't need to press ALT+F1 since GDM shows after plymouth. So I guess there's a bug there, since it should display plymouth and not the Ubuntu loading text and boot directly to GDM. Now if I patch the kernel: diff --git a/drivers/firmware/efi/efi-bgrt.c b/drivers/firmware/efi/efi-bgrt.c index b07c17643210..5754e530af9a 100644 --- a/drivers/firmware/efi/efi-bgrt.c +++ b/drivers/firmware/efi/efi-bgrt.c @@ -42,7 +42,7 @@ void __init efi_bgrt_init(struct acpi_table_header *table) return; } *bgrt = *(struct acpi_table_bgrt *)table; - if (bgrt->version != 1) { + if (bgrt->version != 1 && false) { /* don't check BGRT version */ pr_notice("Ignoring BGRT: invalid version %u (expected 1)\n", bgrt->version); goto out; And linux-modules and linux-modules-extra is not installed in that kernel, then I have somewhat flicker free boot. It shows the bgrt screen then goes black (probably grub loading), then shows the bgrt screen again with the spinner. Nice! (see video: [3]) So, I guess my Thinkpad is not setting bgrt version properly. So can we have a kernel parameter to disable checking of bgrt version? Then again, if I install linux-modules and linux-modules-extra then I get the Ubuntu loading text when booting, but if I press esc I get the bgrt screen with spinner. I think it's it's a bug somewhere in the linux-modules package. [1] https://youtu.be/tAgRf2c7J4A [2] https://youtu.be/1ystyzLhSaw [3] https://youtu.be/8AAkUDO2Kt8 ProblemType: Bug DistroRelease: Ubuntu 19.10 Package: linux-image-5.2.0-8-generic (not installed) ProcVersionSignature: Ubuntu 5.2.0-8.9+test1-generic 5.2.0 Uname: Linux 5.2.0-8-generic x86_64 ApportVersion: 2.20.11-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: shemgp 13358 F.... pulseaudio CurrentDesktop: GNOME Date: Tue Jul 30 23:49:49 2019 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=cc5ba738-82e8-404a-9bcc-f1dfed94fce0 InstallationDate: Installed on 2015-09-28 (1401 days ago) InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422) MachineType: LENOVO 34361A0 ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.2.0-8-generic root=UUID=da81a856-84d5-4ca7-8c0a-4f20006730bc ro quiet splash i915.fastboot=1 vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-5.2.0-8-generic N/A linux-backports-modules-5.2.0-8-generic N/A linux-firmware 1.181 SourcePackage: linux StagingDrivers: ashmem_linux UpgradeStatus: Upgraded to eoan on 2019-07-26 (4 days ago) dmi.bios.date: 06/11/2019 dmi.bios.vendor: LENOVO dmi.bios.version: GCETB4WW (2.74 ) dmi.board.asset.tag: Not Available dmi.board.name: 34361A0 dmi.board.vendor: LENOVO dmi.board.version: Not Defined dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvrGCETB4WW(2.74):bd06/11/2019:svnLENOVO:pn34361A0:pvrThinkPadX220:rvnLENOVO:rn34361A0:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.family: ThinkPad X220 dmi.product.name: 34361A0 dmi.product.sku: LENOVO_MT_3436 dmi.product.version: ThinkPad X220 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838443/+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
