This bug is awaiting verification that the linux-lowlatency- hwe-6.11/6.11.0-1007.7~24.04.1 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-noble-linux- lowlatency-hwe-6.11' to 'verification-done-noble-linux-lowlatency- hwe-6.11'. If the problem still exists, change the tag 'verification- needed-noble-linux-lowlatency-hwe-6.11' to 'verification-failed-noble- linux-lowlatency-hwe-6.11'.
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-noble-linux-lowlatency-hwe-6.11-v2 verification-needed-noble-linux-lowlatency-hwe-6.11 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-oem-6.8 in Ubuntu. https://bugs.launchpad.net/bugs/2072679 Title: Regression: unable to reach low idle states on Tiger Lake Status in linux package in Ubuntu: Fix Released Status in linux-oem-6.8 package in Ubuntu: Invalid Status in linux source package in Noble: Fix Released Status in linux-oem-6.8 source package in Noble: Fix Released Status in linux source package in Oracular: Fix Released Status in linux-oem-6.8 source package in Oracular: Invalid Bug description: In the v2: Thanks for Timo to point out, there is the same problem for lunar-generic and mantic-generic kernels, and we applied to similar UBUNTU SAUCE patches to those kernels, but somehow we forgot to apply the patches to unstable at that time, hence we have regression for this issue in N/O/..., the tracking bug for L/M is: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2034504 short-term plan: SRU the SAUCE patches to N/O/unstable, fix the regression on those Dell machines ASAP. long-term plan: Kai-heng will ping and discuss with linux-pci maintainers, modify the patch as maintainers request, once the formal patches are merged to upstream kernel, I will revert the SAUCE patches from N/O/unstable and SRU the formal patches to these kernels. [Impact] The NVME controller works in RAID on mode by default on some Dell machines, and in this case, the PCIE ASPM couldn't be enabled, and as a result the system idle can't enter deep idle states. This issue not only impacts ubuntu users but also impacts our Dell OEM projects. [Fix] pick 2 commits from linux-pci mailist [Test] After running the patched kernel, we could run 'sudo lspci -nnvv' and check "Non-Volatile memory controller": LnkCtl: ASPM L1 Enabled; And check idle states, we could see the system could enter deep idle: $ sudo cat /sys/kernel/debug/pmc_core/package_cstate_show Package C2 : 55740989 Package C3 : 4656373 Package C6 : 43325041 Package C7 : 6687655 Package C8 : 44948950 Package C9 : 1693 Package C10 : 92865596 [Where problems could occur] Because the patchset is not accepted by upstream yet, it is a bit risky to merge the patchset to ubuntu kernel. And the patch only impacts vmd driver, hence if there is regression, it could only be in the nvme driver with RAID on mode. The regression possibility is very low because we already tested the patch on many Dell, lenovo machines, there is no regression so far. After upgrading to Ubuntu 24.04 the CPU is unable to hit lower idle states. The device is a HP Spectre x360 14 (14-ea1000) with a Tiger Lake CPU. This is a regression introduced somewhere 6.5.0-42 and 6.8.0-36. The issue is not observed when booting the same OS with 6.5.0-42. Some debug output: root@hp-spectre-x360:/sys/kernel/debug/pmc_core# cat package_cstate_show Package C2 : 36087003 Package C3 : 69314350 Package C6 : 0 Package C7 : 0 Package C8 : 0 Package C9 : 0 Package C10 : 0 $ sudo cat /sys/kernel/debug/pmc_core/substate_requirements Element | S0i2.0 | Status | pmc0: USB2PLL_OFF_STS | Required | Yes | pmc0: PCIe/USB3.1_Gen2PLL_OFF_STS | Required | | pmc0: PCIe_Gen3PLL_OFF_STS | Required | Yes | pmc0: OPIOPLL_OFF_STS | Required | Yes | pmc0: OCPLL_OFF_STS | Required | Yes | pmc0: MIPIPLL_OFF_STS | Required | Yes | pmc0: AC_Ring_Osc_OFF_STS | Required | Yes | pmc0: SATAPLL_OFF_STS | Required | Yes | pmc0: CSME_PG_STS | Required | Yes | pmc0: SATA_PG_STS | Required | Yes | pmc0: xHCI_PG_STS | Required | Yes | pmc0: UFSX2_PG_STS | Required | Yes | pmc0: OTG_PG_STS | Required | Yes | pmc0: SPA_PG_STS | Required | Yes | pmc0: SPB_PG_STS | Required | Yes | pmc0: SPC_PG_STS | Required | | pmc0: THC0_PG_STS | Required | Yes | pmc0: THC1_PG_STS | Required | Yes | pmc0: GBETSN_PG_STS | Required | Yes | pmc0: GBE_PG_STS | Required | Yes | pmc0: LPSS_PG_STS | Required | Yes | pmc0: xHCI0_D3_STS | Required | Yes | pmc0: xDCI1_D3_STS | Required | Yes | pmc0: IS_D3_STS | Required | Yes | pmc0: GBE_TSN_D3_STS | Required | Yes | pmc0: CPU_C10_REQ_STS_0 | Required | Yes | pmc0: MPHY_Core_DL_REQ_STS_16 | Required | | pmc0: Break-even_En_REQ_STS_17 | Required | Yes | pmc0: Auto-demo_En_REQ_STS_18 | Required | Yes | pmc0: Int_Timer_SS_Wake0_Pol_STS | Required | | pmc0: Int_Timer_SS_Wake1_Pol_STS | Required | | pmc0: Int_Timer_SS_Wake2_Pol_STS | Required | | pmc0: Int_Timer_SS_Wake3_Pol_STS | Required | | pmc0: Int_Timer_SS_Wake4_Pol_STS | Required | | pmc0: Int_Timer_SS_Wake5_Pol_STS | Required | | On 6.5: pmc0: MPHY_Core_DL_REQ_STS_16 | Required | | pmc0: SPC_PG_STS | Required | | pmc0: PCIe/USB3.1_Gen2PLL_OFF_STS | Required | | have status set to 'Yes' ProblemType: Bug DistroRelease: Ubuntu 24.04 Package: linux-image-6.8.0-38-generic 6.8.0-38.38 ProcVersionSignature: Ubuntu 6.8.0-38.38-generic 6.8.8 Uname: Linux 6.8.0-38-generic x86_64 ApportVersion: 2.28.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/seq: kstoilov 2634 F.... pipewire /dev/snd/controlC0: kstoilov 2634 F.... pipewire kstoilov 2641 F.... wireplumber CRDA: N/A CasperMD5CheckResult: pass CurrentDesktop: ubuntu:GNOME Date: Wed Jul 10 21:26:37 2024 InstallationDate: Installed on 2023-05-04 (433 days ago) InstallationMedia: Ubuntu 22.04.2 LTS "Jammy Jellyfish" - Release amd64 (20230223) MachineType: HP HP Spectre x360 Convertible 14-ea1xxx ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.8.0-38-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-6.8.0-38-generic N/A linux-backports-modules-6.8.0-38-generic N/A linux-firmware 20240318.git3b128b60-0ubuntu2.1 SourcePackage: linux UpgradeStatus: Upgraded to noble on 2024-07-07 (3 days ago) dmi.bios.date: 04/03/2024 dmi.bios.release: 15.33 dmi.bios.vendor: AMI dmi.bios.version: F.33 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 89DB dmi.board.vendor: HP dmi.board.version: 40.65 dmi.chassis.type: 31 dmi.chassis.vendor: HP dmi.chassis.version: Chassis Version dmi.ec.firmware.release: 40.65 dmi.modalias: dmi:bvnAMI:bvrF.33:bd04/03/2024:br15.33:efr40.65:svnHP:pnHPSpectrex360Convertible14-ea1xxx:pvr:rvnHP:rn89DB:rvr40.65:cvnHP:ct31:cvrChassisVersion:sku457Q6AVT#ABA: dmi.product.family: 103C_5335KV HP Spectre dmi.product.name: HP Spectre x360 Convertible 14-ea1xxx dmi.product.sku: 457Q6AVT#ABA dmi.sys.vendor: HP To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2072679/+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
