I'm experiencing this problem on an LG 14ZD90Q with Ubuntu 22.10, latest packages and kernel from the default repos. Mostly the problem occurs when the charger is plugged in, but today it also happened for a while when I had no USB-C devices connected. (I was using a couple of USB-A devices, a keyboard and mouse.) I found a mitigation: disable Intel Turbo Boost, per https://www.tautvidas.com/blog/2011/04/disabling-intel- turbo-boost/ (tl;dr: echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo as root.) It's not a fix, the CPU still keeps maxing out for no reason, but at least it doesn't overheat or max out the fan anymore. Might be useful while we wait for a kernel fix that stops this triggering in the first place.
-- 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/1987829 Title: LG Gram 12gen high CPU use when USB-C/TB is in use Status in linux package in Ubuntu: Confirmed Status in linux package in Fedora: New Bug description: LG Gram laptop 17Z90Q with a Core i7-1260P CPU. Whenever an external monitor is connected to USB-C/Thunderbolt 4, average load goes above 3.0 and the machine is getting very hot. Output from top -H shows a lot of kworker CPU usage: top - 11:45:06 up 33 min, 2 users, load average: 3,30, 3,08, 2,79 Threads: 1442 total, 2 running, 1440 sleeping, 0 stopped, 0 zombie %Cpu(s): 0,1 us, 3,7 sy, 0,0 ni, 96,1 id, 0,0 wa, 0,0 hi, 0,1 si, 0,0 st MiB Mem : 15684,6 total, 8510,2 free, 2580,8 used, 4593,6 buff/cache MiB Swap: 3815,0 total, 3815,0 free, 0,0 used. 11326,9 avail Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ WCHAN COMMAND 7766 root 20 0 0 0 0 R 19,8 0,0 0:56.05 worker_th+ kworker/0:2-events 196 root 20 0 0 0 0 D 15,8 0,0 1:18.12 ec_guard kworker/u32:2+USBC000:00-con0 10237 root 20 0 0 0 0 I 12,9 0,0 0:26.44 worker_th+ kworker/0:0-events 1027 root 20 0 0 0 0 I 6,6 0,0 0:43.30 worker_th+ kworker/1:3-events 10971 root 20 0 0 0 0 I 4,0 0,0 0:00.20 worker_th+ kworker/15:0-events 175 root 20 0 0 0 0 I 2,3 0,0 0:03.24 worker_th+ kworker/11:1-events 2410 root 20 0 0 0 0 I 1,7 0,0 0:05.49 worker_th+ kworker/9:3-events Perf shows a lot of time spent inside handle_irq_event/acpi_ev_gpe_detect/acpi_hw_gpe_read. Additionally, kernel log is getting spammed with these lines every 4 seconds (but also without any USB-C device attached): [ 223.514304] ACPI Error: No handler for Region [XIN1] (00000000f2ad4f1f) [UserDefinedRegion] (20210730/evregion-130) [ 223.514323] ACPI Error: Region UserDefinedRegion (ID=143) has no handler (20210730/exfldio-261) [ 223.514337] Initialized Local Variables for Method [_TMP]: [ 223.514339] Local0: 0000000021495082 <Obj> Integer 0000000000000034 [ 223.514349] No Arguments are initialized for method [_TMP] [ 223.514354] ACPI Error: Aborting method \_SB.PC00.LPCB.LGEC.SEN2._TMP due to previous error (AE_NOT_EXIST) (20210730/psparse-529) ProblemType: Bug DistroRelease: Ubuntu 22.04 Package: linux-image-5.15.0-46-generic 5.15.0-46.49 ProcVersionSignature: Ubuntu 5.15.0-46.49-generic 5.15.39 Uname: Linux 5.15.0-46-generic x86_64 ApportVersion: 2.20.11-0ubuntu82.1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: me 1678 F.... pulseaudio /dev/snd/controlC1: me 1678 F.... pulseaudio CRDA: N/A CasperMD5CheckResult: pass Date: Fri Aug 26 11:57:05 2022 InstallationDate: Installed on 2022-08-25 (1 days ago) InstallationMedia: Ubuntu 22.04.1 LTS "Jammy Jellyfish" - Release amd64 (20220809.1) MachineType: LG Electronics 17Z90Q-G.AA78N ProcFB: 0 i915drmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.15.0-46-generic root=UUID=e2f96916-a67c-432e-b687-730071271216 ro quiet splash vt.handoff=7 PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: linux-restricted-modules-5.15.0-46-generic N/A linux-backports-modules-5.15.0-46-generic N/A linux-firmware 20220329.git681281e4-0ubuntu3.4 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/06/2022 dmi.bios.release: 0.1 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: A1ZG0380 X64 dmi.board.asset.tag: Base Board Asset Tag dmi.board.name: 17Z90Q dmi.board.vendor: LG Electronics dmi.board.version: FAB1 dmi.chassis.asset.tag: Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LG Electronics dmi.chassis.version: 0.1 dmi.ec.firmware.release: 33.0 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrA1ZG0380X64:bd07/06/2022:br0.1:efr33.0:svnLGElectronics:pn17Z90Q-G.AA78N:pvr0.1:rvnLGElectronics:rn17Z90Q:rvrFAB1:cvnLGElectronics:ct10:cvr0.1:skuEVO: dmi.product.family: LG gram PC dmi.product.name: 17Z90Q-G.AA78N dmi.product.sku: EVO dmi.product.version: 0.1 dmi.sys.vendor: LG Electronics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1987829/+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
