Hello there, I'd like to just note, that I had the same problem with 18.04 LTS HWE (5.0.0-23-generic) and an i5-8350U, but mine was clocking around 3.6GHz on each core. Upgrade to 5.0.0-31-generic has resolved this issue with intel_pstate driver, but using the kernel parameter intel_pstate=disable was a usable workaround as well.
Regards -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1838141 Title: intel_pstate not working. CPU frequency fixed at 800MHz. No cpu frequency scaling. Status in linux package in Ubuntu: Fix Released Status in linux source package in Bionic: New Bug description: intel_pstate not working. CPU frequency fixed at 800MHz. I've tried to modify frequency using "cpufreq-set" and also by directly writing to files in "/sys/devices/system/cpu/cpu0/cpufreq/*" to no success. I tried different versions of kernel, it started working on 4.17.0 but stopped working soon. These are the versions I tested. 5.2.3 - Not Working 5.1.0 - Not Working 4.19.60 - Not Working 4.18.20 - Not Working 4.17.19 - Not Working 4.17.10 - Not Working 4.17.5 - Not Working 4.17.3 - Not Working 4.17.2 - Working 4.17.1 - Working 4.17.0 - Working 4.16.18 - Not Working 4.15.0 - Not Working Please let me know if anything else is needed. thanks ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-55-generic 4.15.0-55.60 ProcVersionSignature: Ubuntu 4.15.0-55.60-generic 4.15.18 Uname: Linux 4.15.0-55-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: srijan 2219 F.... pulseaudio CurrentDesktop: KDE Date: Sat Jul 27 11:34:10 2019 InstallationDate: Installed on 2018-11-25 (243 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) Lsusb: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 003: ID 0bda:5621 Realtek Semiconductor Corp. Bus 001 Device 002: ID 046d:c534 Logitech, Inc. Unifying Receiver Bus 001 Device 004: ID 8087:0aaa Intel Corp. Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub MachineType: Acer Predator PH315-51 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-55-generic root=UUID=a76bd009-8058-4e96-a8b5-a82b7fbe1ede ro acpi_backlight=vendor i915.modeset=1 i915.enable_guc=3 i915.enable_dc=2 i915.enable_fbc=1 nvme_core.default_ps_max_latency_us=18000000 pcie_aspm=force i915.enable_psr=2 i915.disable_power_well=1 nmi_watchdog=0 RelatedPackageVersions: linux-restricted-modules-4.15.0-55-generic N/A linux-backports-modules-4.15.0-55-generic N/A linux-firmware 1.173.10 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) WifiSyslog: dmi.bios.date: 12/05/2018 dmi.bios.vendor: Insyde Corp. dmi.bios.version: V1.24 dmi.board.asset.tag: Type2 - Board Serial Number dmi.board.name: Sienta_CFS dmi.board.vendor: CFL dmi.board.version: V1.24 dmi.chassis.type: 10 dmi.chassis.vendor: Acer dmi.chassis.version: V1.24 dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.24:bd12/05/2018:svnAcer:pnPredatorPH315-51:pvrV1.24:rvnCFL:rnSienta_CFS:rvrV1.24:cvnAcer:ct10:cvrV1.24: dmi.product.family: Predator Helios 300 dmi.product.name: Predator PH315-51 dmi.product.version: V1.24 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1838141/+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
