[Bug 2144522] Re: Dell Machines cannot boot into OS with 6.17.0-1012-oem

This bug is awaiting verification that the linux/6.17.0-23.23 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-questing-linux' to 'verification-done-questing- linux'. If the problem still exists, change the tag 'verification- needed-questing-linux' to 'verification-failed-questing-linux'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-questing-linux-v2 verification-needed-questing-linux -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2144522 Title: Dell Machines cannot boot into OS with 6.17.0-1012-oem Status in linux package in Ubuntu: Invalid Status in linux-oem-6.17 package in Ubuntu: Invalid Status in linux source package in Noble: Invalid Status in linux-oem-6.17 source package in Noble: Fix Released Status in linux source package in Questing: In Progress Status in linux-oem-6.17 source package in Questing: Invalid Bug description: [Impact] Dell systems (CID: 202506-36819, 202506-36820, 202506-36823, 202506-36826) with AMD GFX 11.0.4 (gfx11) graphics cannot boot into the OS after upgrading to 6.17.0-1012-oem. The machine becomes stuck during boot and cannot reach the desktop. Booting with `nomodeset` works as a workaround, pointing to an amdgpu driver initialization failure. Failure rate: 4/4 (100%) on affected Dell systems. [Fix] Two patches fix this boot regression: 1. Raise the minimum MES firmware version for calling set_hw_resources_1 on GC 11.0.4 from 0x50 to 0x52, ensuring firmware that cannot properly initialize this call is not used. upstream in mainline kernel v7.0: 1478a34470bf drm/amd: Set minimum version for set_hw_resource_1 on gfx11 to 0x52 2. Remove the MES LR compute workaround (enable_lr_compute_wa) from both mes_v11_0.c and mes_v12_0.c, since the underlying issue was already fixed by adjusting the VGPR size, and keeping the workaround causes instability with newer GC microcode. upstream in mainline kernel v7.0: 6b0d812971370 drm/amd: Disable MES LR compute W/A [Test Plan] Boot the affected machine with kernel 6.17.0-1012-oem (or later oem kernel). Without the patches: System gets stuck during boot and cannot reach the OS (amdgpu fails to initialize). With the patches: System boots normally to the desktop without requiring `nomodeset`. To verify: 1. Boot without `nomodeset` 2. Check that the desktop loads successfully 3. Confirm no amdgpu-related errors blocking boot in dmesg: $ sudo dmesg | grep -i "amdgpu\|mes\|drm" [Where problems could occur] These changes affect the amdgpu MES initialization path for gfx11 (mes_v11_0.c) and gfx12 (mes_v12_0.c) hardware. For patch 1: If the version threshold 0x52 is incorrect, machines with MES firmware between 0x50 and 0x51 that previously worked could stop calling set_hw_resources_1, potentially causing degraded GPU performance or missing hardware resource configuration. This would manifest as graphical glitches, GPU compute failures, or silent capability loss after MES initialization. For patch 2: If the LR compute workaround was actually needed for some gfx11/gfx12 product beyond gfx1151, removing it could cause GPU hangs or compute workload failures on those variants. Symptoms would include GPU hangs, DRM timeout errors, or compute job failures under load. [Other Info] Both patches are upstream in Linux 7.0 (merged via drm-next-2026-02-11). ================================================================= [Summary] Several Dell Machines failed to boot into OS on 6.17.0-1012-oem. [Reproduce Steps] 1. Install the GM image (6.11). 2. Run the dist-upgrade to 6.17 3. sudo reboot On 6.11, the machine can boot into OS after reboot. However, after upgrading to 6.17, it becomes stuck during boot and cannot reach the OS. However, if root is modified to nomodeset in 6.17, the machine can boot into the OS successfully. [Affected Machines] https://certification.canonical.com/hardware/202506-36819/ https://certification.canonical.com/hardware/202506-36820/ https://certification.canonical.com/hardware/202506-36823/ https://certification.canonical.com/hardware/202506-36826/ [Failed Rate] 4/4 (100%) ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.17.0-1012-oem 6.17.0-1012.12 ProcVersionSignature: Ubuntu 6.17.0-1012.12-oem 6.17.9 Uname: Linux 6.17.0-1012-oem x86_64 ApportVersion: 2.28.1-0ubuntu3.8 Architecture: amd64 AudioDevicesInUse:  USER PID ACCESS COMMAND  /dev/snd/controlC1: ubuntu 1271 F.... wireplumber  /dev/snd/controlC0: ubuntu 1271 F.... wireplumber  /dev/snd/seq: ubuntu 1266 F.... pipewire CRDA: N/A CasperMD5CheckMismatches: ./casper/initrd ./casper/vmlinuz ./casper/minimal.standard.live.hotfix.manifest ./casper/minimal.standard.live.hotfix.size ./casper/minimal.standard.live.size ./casper/minimal.manifest ./casper/minimal.standard.manifest ./casper/minimal.standard.size ./casper/minimal.hotfix.size ./casper/minimal.standard.live.hotfix.squashfs ./casper/minimal.standard.hotfix.squashfs ./casper/minimal.standard.hotfix.size ./casper/minimal.hotfix.squashfs ./casper/minimal.standard.live.manifest ./casper/minimal.size ./boot/grub/grub.cfg CasperMD5CheckResult: fail Date: Mon Mar 16 03:28:36 2026 DistributionChannelDescriptor:  # This is the distribution channel descriptor for Ubuntu 24.04 for Dell  # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor  canonical-oem-somerville-noble-oem-24.04b-proposed-20250617-524 InstallationDate: Installed on 2026-03-16 (0 days ago) InstallationMedia: Ubuntu OEM 24.04.2 LTS "Noble Numbat" - Release amd64 (20250615) MachineType: Dell Inc. Dell 16 DC16255 ProcFB: 0 simpledrmdrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-6.17.0-1012-oem root=UUID=d1b47013-8d11-47bc-9f6a-8046300ab97d ro nomodeset quiet splash vt.handoff=7 RelatedPackageVersions:  linux-restricted-modules-6.17.0-1012-oem N/A  linux-backports-modules-6.17.0-1012-oem N/A  linux-firmware 20240318.git3b128b60-0ubuntu2.25 SourcePackage: linux-oem-6.17 UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/18/2025 dmi.bios.release: 5.3 dmi.bios.vendor: Dell Inc. dmi.bios.version: 0.4.10 dmi.board.asset.tag: AFTPASS dmi.board.vendor: Dell Inc. dmi.chassis.asset.tag: AFTPASS dmi.chassis.type: 10 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.4.10 dmi.modalias: dmi:bvnDellInc.:bvr0.4.10:bd06/18/2025:br5.3:svnDellInc.:pnDell16DC16255:pvr:rvnDellInc.:rn:rvr:cvnDellInc.:ct10:cvr0.4.10:sku0D95: dmi.product.family: Inspiron dmi.product.name: Dell 16 DC16255 dmi.product.sku: 0D95 dmi.sys.vendor: Dell Inc. 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