** Description changed: + 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 + 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 | + 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: + 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 + 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 + 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
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2072679 Title: Regression: unable to reach low idle states on Tiger Lake To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2072679/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
