[Bug 2167009] [NEW] Regression in 6.8.0-139: resume from hibernation hangs (GSC proxy bind timeout); 6.8.0-138 unaffected with identical userspace

Public bug reported: Hardware: CyberPowerPC / ASUS Z890 MAX GAMING WIFI7, BIOS 3002 (01/29/2026) CPU: Intel Core Ultra 9 285K (Arrow Lake) GPU: Intel Arrow Lake iGPU (i915) + NVIDIA RTX 4070 Ti SUPER (nvidia 595.84, DKMS) Kubuntu 24.04, X11/KDE Plasma Summary: Resume from hibernation reliably hangs on 6.8.0-139-generic. Booting 6.8.0-138-generic, with no other package changes, resumes from hibernation without any issues. This isolates the regression to the kernel package itself, not to userspace, initramfs, or firmware shipped alongside it. Details: The hibernation image is written and read back successfully. The restored kernel begins resuming devices and then never completes -- "PM: resume of devices complete" never prints. The machine is not frozen: it continues servicing timers indefinitely (observed for 5+ minutes without a hang or watchdog panic). Console output (captured with no_console_suspend ignore_loglevel pm_debug_messages keep_bootcon): [ 52.940] PM: hibernation: Read 12721052 kbytes in 11.76 seconds [ 52.941] PM: Image successfully loaded [174.845] i915 0000:00:02.0: [drm] GT1: Loaded GSC firmware i915/mtl_gsc_1.bin [174.865] i915 0000:00:02.0: [drm] GT1: HuC: authenticated for all workloads [194.867] i915 0000:00:02.0: [drm] *ERROR* GT1: GSC proxy component didn't bind within the expected timeout [194.873] i915 0000:00:02.0: [drm] *ERROR* GT1: GSC proxy handler failed to init [228.539] page_pool_release_retry() stalled pool shutdown: id 29, 7 inflight 60 sec (repeats at 120, 181, 241, 302, 362 sec ...) Note: mei_gsc_proxy binds correctly on resume from S3 (suspend-to-RAM) on this same machine; it only fails to bind after hibernation (S4). Also observed on the hibernate-entry path, one WARNING per CPU offlined (may be unrelated, noting for completeness): sysfs group 'package_00_die_00' not found for kobject 'intel_uncore_frequency' WARNING: at fs/sysfs/group.c:282 sysfs_remove_group+0x85/0x90 Call Trace: uncore_freq_remove_die_entry -> uncore_event_cpu_offline -> cpuhp_invoke_callback Steps to reproduce: 1. Boot 6.8.0-139-generic. 2. sudo systemctl hibernate (or via suspend-then-hibernate). 3. Power the machine back on. Expected: resumes normally. Actual: hangs indefinitely during device resume; only page_pool_release_retry warnings continue printing every ~60 seconds. Regression confirmed: Booted 6.8.0-138-generic with identical userspace/initramfs/firmware packages (only the running kernel differs). Hibernate/resume completed successfully with no issues. This confirms the regression is isolated to the 6.8.0-139 kernel package itself. Already ruled out: - nvidia DKMS module builds cleanly for 6.8.0-139; vermagic matches uname -r - Unloading all nvidia modules (nvidia_drm, nvidia_modeset, nvidia_uvm, nvidia) before hibernating does NOT fix the hang - CONFIG_DPM_WATCHDOG is not set in this kernel build, so no automatic panic/device name is produced on the hang; diagnosis required manual console capture via no_console_suspend Workaround in use: booting 6.8.0-138-generic until this is resolved. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.8.0-139-generic 6.8.0-139.139 ProcVersionSignature: Ubuntu 6.8.0-139.139-generic 6.8.12 Uname: Linux 6.8.0-139-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.28.3-0ubuntu0.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: pm 3425 F.... wireplumber /dev/snd/controlC1: pm 3425 F.... wireplumber /dev/snd/controlC0: pm 3425 F.... wireplumber /dev/snd/seq: pm 3423 F.... pipewire CasperMD5CheckResult: unknown CurrentDesktop: KDE Date: Thu Sep 10 13:22:26 2026 HibernationDevice: RESUME=UUID=f2799cf1-38b5-43b9-80b1-9f330e95c354 InstallationDate: Installed on 2024-12-22 (628 days ago) InstallationMedia: Kubuntu 24.04.1 LTS "Noble Numbat" - Release amd64 (20240827) MachineType: CyberPowerPC GamingPC ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-139-generic root=UUID=d7e17bac-b56c-4498-b5e0-e249bd682b7d ro no_console_suspend ignore_loglevel pm_debug_messages keep_bootcon cryptdevice=UUID=c8b193ba-0124-495f-a549-091eb877b76a:cryptroot root=/dev/mapper/cryptroot resume=UUID=f2799cf1-38b5-43b9-80b1-9f330e95c354 "acpi_osi=Windows 2022" nvidia_drm.fbdev=0 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-6.8.0-139-generic N/A linux-backports-modules-6.8.0-139-generic N/A linux-firmware 20240318.git3b128b60.0ubuntu3.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/29/2026 dmi.bios.release: 30.2 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3002 dmi.board.asset.tag: Default string dmi.board.name: Z890 MAX GAMING WIFI7 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3002:bd01/29/2026:br30.2:svnCyberPowerPC:pnGamingPC:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ890MAXGAMINGWIFI7:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:skuCPPC-SYSTEM-US: dmi.product.family: C Series dmi.product.name: GamingPC dmi.product.sku: CPPC-SYSTEM-US dmi.product.version: System Version dmi.sys.vendor: CyberPowerPC ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug noble -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2167009 Title: Regression in 6.8.0-139: resume from hibernation hangs (GSC proxy bind timeout); 6.8.0-138 unaffected with identical userspace Status in linux package in Ubuntu: New Bug description: Hardware: CyberPowerPC / ASUS Z890 MAX GAMING WIFI7, BIOS 3002 (01/29/2026) CPU: Intel Core Ultra 9 285K (Arrow Lake) GPU: Intel Arrow Lake iGPU (i915) + NVIDIA RTX 4070 Ti SUPER (nvidia 595.84, DKMS) Kubuntu 24.04, X11/KDE Plasma Summary: Resume from hibernation reliably hangs on 6.8.0-139-generic. Booting 6.8.0-138-generic, with no other package changes, resumes from hibernation without any issues. This isolates the regression to the kernel package itself, not to userspace, initramfs, or firmware shipped alongside it. Details: The hibernation image is written and read back successfully. The restored kernel begins resuming devices and then never completes -- "PM: resume of devices complete" never prints. The machine is not frozen: it continues servicing timers indefinitely (observed for 5+ minutes without a hang or watchdog panic). Console output (captured with no_console_suspend ignore_loglevel pm_debug_messages keep_bootcon): [ 52.940] PM: hibernation: Read 12721052 kbytes in 11.76 seconds [ 52.941] PM: Image successfully loaded [174.845] i915 0000:00:02.0: [drm] GT1: Loaded GSC firmware i915/mtl_gsc_1.bin [174.865] i915 0000:00:02.0: [drm] GT1: HuC: authenticated for all workloads [194.867] i915 0000:00:02.0: [drm] *ERROR* GT1: GSC proxy component didn't bind within the expected timeout [194.873] i915 0000:00:02.0: [drm] *ERROR* GT1: GSC proxy handler failed to init [228.539] page_pool_release_retry() stalled pool shutdown: id 29, 7 inflight 60 sec (repeats at 120, 181, 241, 302, 362 sec ...) Note: mei_gsc_proxy binds correctly on resume from S3 (suspend-to-RAM) on this same machine; it only fails to bind after hibernation (S4). Also observed on the hibernate-entry path, one WARNING per CPU offlined (may be unrelated, noting for completeness): sysfs group 'package_00_die_00' not found for kobject 'intel_uncore_frequency' WARNING: at fs/sysfs/group.c:282 sysfs_remove_group+0x85/0x90 Call Trace: uncore_freq_remove_die_entry -> uncore_event_cpu_offline -> cpuhp_invoke_callback Steps to reproduce: 1. Boot 6.8.0-139-generic. 2. sudo systemctl hibernate (or via suspend-then-hibernate). 3. Power the machine back on. Expected: resumes normally. Actual: hangs indefinitely during device resume; only page_pool_release_retry warnings continue printing every ~60 seconds. Regression confirmed: Booted 6.8.0-138-generic with identical userspace/initramfs/firmware packages (only the running kernel differs). Hibernate/resume completed successfully with no issues. This confirms the regression is isolated to the 6.8.0-139 kernel package itself. Already ruled out: - nvidia DKMS module builds cleanly for 6.8.0-139; vermagic matches uname -r - Unloading all nvidia modules (nvidia_drm, nvidia_modeset, nvidia_uvm, nvidia) before hibernating does NOT fix the hang - CONFIG_DPM_WATCHDOG is not set in this kernel build, so no automatic panic/device name is produced on the hang; diagnosis required manual console capture via no_console_suspend Workaround in use: booting 6.8.0-138-generic until this is resolved. ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.8.0-139-generic 6.8.0-139.139 ProcVersionSignature: Ubuntu 6.8.0-139.139-generic 6.8.12 Uname: Linux 6.8.0-139-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.28.3-0ubuntu0.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: pm 3425 F.... wireplumber /dev/snd/controlC1: pm 3425 F.... wireplumber /dev/snd/controlC0: pm 3425 F.... wireplumber /dev/snd/seq: pm 3423 F.... pipewire CasperMD5CheckResult: unknown CurrentDesktop: KDE Date: Thu Sep 10 13:22:26 2026 HibernationDevice: RESUME=UUID=f2799cf1-38b5-43b9-80b1-9f330e95c354 InstallationDate: Installed on 2024-12-22 (628 days ago) InstallationMedia: Kubuntu 24.04.1 LTS "Noble Numbat" - Release amd64 (20240827) MachineType: CyberPowerPC GamingPC ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-139-generic root=UUID=d7e17bac-b56c-4498-b5e0-e249bd682b7d ro no_console_suspend ignore_loglevel pm_debug_messages keep_bootcon cryptdevice=UUID=c8b193ba-0124-495f-a549-091eb877b76a:cryptroot root=/dev/mapper/cryptroot resume=UUID=f2799cf1-38b5-43b9-80b1-9f330e95c354 "acpi_osi=Windows 2022" nvidia_drm.fbdev=0 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-6.8.0-139-generic N/A linux-backports-modules-6.8.0-139-generic N/A linux-firmware 20240318.git3b128b60.0ubuntu3.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 01/29/2026 dmi.bios.release: 30.2 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 3002 dmi.board.asset.tag: Default string dmi.board.name: Z890 MAX GAMING WIFI7 dmi.board.vendor: ASUSTeK COMPUTER INC. dmi.board.version: Rev 1.xx dmi.chassis.asset.tag: Default string dmi.chassis.type: 3 dmi.chassis.vendor: Default string dmi.chassis.version: Default string dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3002:bd01/29/2026:br30.2:svnCyberPowerPC:pnGamingPC:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ890MAXGAMINGWIFI7:rvrRev1.xx:cvnDefaultstring:ct3:cvrDefaultstring:skuCPPC-SYSTEM-US: dmi.product.family: C Series dmi.product.name: GamingPC dmi.product.sku: CPPC-SYSTEM-US dmi.product.version: System Version dmi.sys.vendor: CyberPowerPC To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2167009/+subscriptions