[Bug 2162673] [NEW] System hang/reboot on kernel 7.0.0-28-generic with repeated amdgpu MODE1 resets (Ryzen 7 5700X + RX 7600)

Public bug reported: System hang/reboot on kernel 7.0.0-28-generic (AMD Ryzen 7 5700X, RX 7600). journalctl shows repeated amdgpu MODE1 reset events throughout the day (00:05, 06:47, 08:06) preceding a fatal crash at 15:46 that triggered kdump. Crash dump shows: WARNING: kernel/workqueue.c:2351 at __queue_work.part.0+0x190/0x390, CPU#2: swapper/2/0 with multiple CPUs dumping backtraces simultaneously. The crash coincided with a snap app (office365webdesktop) attempting GPU-accelerated Vulkan/DRI initialization. Kernel 7.0.0-22 has been stable as a workaround. dmesg attached: /var/crash/202608011547/dmesg.202608011547 ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-28-generic 7.0.0-28.28 ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12 Uname: Linux 7.0.0-28-generic x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sun Aug 2 14:58:17 2026 InstallationDate: Installed on 2026-04-23 (101 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) IwDevWlp6s0Link: Not connected. MachineType: Gigabyte Technology Co., Ltd. B550M AORUS ELITE ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic root=UUID=67cd9e19-bcef-4463-95ea-5dbdd9b6019e ro quiet splash processor.max_cstate=1 crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/14/2026 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: FHb dmi.board.asset.tag: Default string dmi.board.name: B550M AORUS ELITE dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrFHb:bd04/14/2026:br5.17:svnGigabyteTechnologyCo.,Ltd.:pnB550MAORUSELITE:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnB550MAORUSELITE:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaB550MB: dmi.product.family: B550 MB dmi.product.name: B550M AORUS ELITE dmi.product.sku: Default string dmi.product.version: Default string dmi.sys.vendor: Gigabyte Technology Co., Ltd. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug resolute -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2162673 Title: System hang/reboot on kernel 7.0.0-28-generic with repeated amdgpu MODE1 resets (Ryzen 7 5700X + RX 7600) Status in linux package in Ubuntu: New Bug description: System hang/reboot on kernel 7.0.0-28-generic (AMD Ryzen 7 5700X, RX 7600). journalctl shows repeated amdgpu MODE1 reset events throughout the day (00:05, 06:47, 08:06) preceding a fatal crash at 15:46 that triggered kdump. Crash dump shows: WARNING: kernel/workqueue.c:2351 at __queue_work.part.0+0x190/0x390, CPU#2: swapper/2/0 with multiple CPUs dumping backtraces simultaneously. The crash coincided with a snap app (office365webdesktop) attempting GPU-accelerated Vulkan/DRI initialization. Kernel 7.0.0-22 has been stable as a workaround. dmesg attached: /var/crash/202608011547/dmesg.202608011547 ProblemType: Bug DistroRelease: Ubuntu 26.04 Package: linux-image-7.0.0-28-generic 7.0.0-28.28 ProcVersionSignature: Ubuntu 7.0.0-28.28-generic 7.0.12 Uname: Linux 7.0.0-28-generic x86_64 ApportVersion: 2.34.1-0ubuntu0.1 Architecture: amd64 CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Sun Aug 2 14:58:17 2026 InstallationDate: Installed on 2026-04-23 (101 days ago) InstallationMedia: Ubuntu 26.04 "Resolute Raccoon" - Release amd64 (20260423.1) IwDevWlp6s0Link: Not connected. MachineType: Gigabyte Technology Co., Ltd. B550M AORUS ELITE ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-7.0.0-28-generic root=UUID=67cd9e19-bcef-4463-95ea-5dbdd9b6019e ro quiet splash processor.max_cstate=1 crashkernel=2G-4G:320M,4G-32G:512M,32G-64G:1024M,64G-128G:2048M,128G-:4096M SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/14/2026 dmi.bios.release: 5.17 dmi.bios.vendor: American Megatrends International, LLC. dmi.bios.version: FHb dmi.board.asset.tag: Default string dmi.board.name: B550M AORUS ELITE dmi.board.vendor: Gigabyte Technology Co., Ltd. dmi.board.version: x.x dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInternational,LLC.:bvrFHb:bd04/14/2026:br5.17:svnGigabyteTechnologyCo.,Ltd.:pnB550MAORUSELITE:pvrDefaultstring:rvnGigabyteTechnologyCo.,Ltd.:rnB550MAORUSELITE:rvrx.x:cvnDefaultstring:ct3:cvrDefaultstring:skuDefaultstring:pfaB550MB: dmi.product.family: B550 MB dmi.product.name: B550M AORUS ELITE dmi.product.sku: Default string dmi.product.version: Default string dmi.sys.vendor: Gigabyte Technology Co., Ltd. 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