I am running LG Gram 16Z90Q (Intel I5) with PopOS and kernel 6.0.6 and I
don't have this issue. Battery lasts half a day, it does not get hot
whether plugged in or not. I had stability issues with Ubuntu, although I
was running the newest release, not the LTS version and I did not have much
time to dig into what is causing it. Then I figured System76 guys are
building OS for laptops so maybe they already did the necessary tricks. And
I fell in love with their tiling windows manager.
The only things that do not work are fingerprint reader and the screen
brightness buttons (they work with huge lag).

śr., 22 lut 2023 o 01:55 Kai-Heng Feng <email address hidden>
napisał(a):

> Please give latest mainline kernel a try:
> https://kernel.ubuntu.com/~kernel-ppa/mainline/v6.2/amd64/
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> 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
>
>