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    High CPU usage by kworker

    Scheduled Pinned Locked Moved OS
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      • BollyB Offline
        Bolly @kugiigi
        last edited by Bolly

        Thanks @kugiigi,
        The first thing I did was to switch to RC(2021-W30) but as I saw that kworker had the same behavior, I thought that was kworker. Now I see straight lines when the UT is in airplane mode and not in use ! πŸŽ‰πŸŽ‰πŸŽ‰

        screenshot20210806_085948575.png

        I guess kworker has a similar behavior to SchrΓΆdinger's cat:
        When the mobile is locked and you are connected by ssh its consumption skyrockets. I guess when you are not connected by ssh there is no consumption, otherwise the battery would not last so long.

        2015-Now (Daily use) : BQ Aquaris E4.5 Ubuntu edition
        2016-Now (Daily use) : BQ Aquaris M10 FHD Betatester

        2020-Now : PinePhone Braveheart & CE UBports
        2020-Now (Family/Daily use): Vollaphone Xenial
        2022-Now (Family/Daily use): Vollaphone 22 Focal

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        • K Offline
          kristatos
          last edited by kristatos

          I've observed the battery usage over the week. I've used my main sim-card in an other phone and used the E4.5 with only the second sim-card and some wifi-connections. Over the week there was no unusual battery waste.
          Yesterday I plugged in my main sim-card again. The first day with both sim inserted was pretty normal, today I got a battery drain again after using a wifi connection (normally around 10% per day, now 60% in 5 hours).
          What I find strange is that normally when I press the power button to wake up the phone/screen, it takes aprox. 1,5 seconds until the screen and the backlight is switched on.
          For now the screen is on immediatly after pressing the power button, so I think something in the background isn't going to sleep as intended and so the battery drains.

          Edit:
          In dmesg there hundreds of those lines (forget the date-/timestamp):
          [Di Aug 10 12:48:23 2021] [WMT-LIB][E]wmt_lib_is_therm_ctrl_support(1175):thermal command can not be send: STP is not ready
          [Di Aug 10 12:48:23 2021] [WMT-EXP][E]_mtk_wcn_wmt_therm_ctrl(232):thermal ctrl function not supported

          BQ Aquaris E4.5 (UT 16.04)
          Vollaphone (UT 20.04)

          BollyB 1 Reply Last reply Reply Quote 0
          • BollyB Offline
            Bolly @kristatos
            last edited by

            @kristatos said in High CPU usage by kworker:

            I've observed the battery usage over the week. I've used my main sim-card in an other phone and used the E4.5 with only the second sim-card and some wifi-connections. Over the week there was no unusual battery waste.
            Yesterday I plugged in my main sim-card again. The first day with both sim inserted was pretty normal, today I got a battery drain again after using a wifi connection (normally around 10% per day, now 60% in 5 hours).
            What I find strange is that normally when I press the power button to wake up the phone/screen, it takes aprox. 1,5 seconds until the screen and the backlight is switched on.
            For now the screen is on immediatly after pressing the power button, so I think something in the background isn't going to sleep as intended and so the battery drains.
            Edit:
            In dmesg there hundreds of those lines (forget the date-/timestamp):
            [Di Aug 10 12:48:23 2021] [WMT-LIB][E]wmt_lib_is_therm_ctrl_support(1175):thermal command can not be send: STP is not ready
            [Di Aug 10 12:48:23 2021] [WMT-EXP][E]_mtk_wcn_wmt_therm_ctrl(232):thermal ctrl function not supported

            If you are brave, switch to RC, this is solved. πŸ™‚

            2015-Now (Daily use) : BQ Aquaris E4.5 Ubuntu edition
            2016-Now (Daily use) : BQ Aquaris M10 FHD Betatester

            2020-Now : PinePhone Braveheart & CE UBports
            2020-Now (Family/Daily use): Vollaphone Xenial
            2022-Now (Family/Daily use): Vollaphone 22 Focal

            K 1 Reply Last reply Reply Quote 0
            • K Offline
              kristatos @Bolly
              last edited by kristatos

              @bolly Is it really solved or do you think it is solved? Have you already switched to rc to get rid of this issue?

              edit. I think you mean this bug-report, right?

              BQ Aquaris E4.5 (UT 16.04)
              Vollaphone (UT 20.04)

              BollyB 1 Reply Last reply Reply Quote 0
              • BollyB Offline
                Bolly @kristatos
                last edited by

                @kristatos said in High CPU usage by kworker:

                @bolly Is it really solved or do you think it is solved? Have you already switched to rc to get rid of this issue?

                It's already fixed, and I switched to RC as I said in the previous message (maybe I didn't express myself well). See the new screenshot, but the one from the other day was fine too. Compare it with the first one I posted. :beaming_face_with_smiling_eyes:

                screenshot20210816_212018028.png

                edit. I think you mean this bug-report, right?

                I haven't looked, first time I've seen it. @kugiigi told me and I just believed it. :cat_face_with_tears_of_joy:

                https://forums.ubports.com/topic/6525/high-cpu-usage-by-kworker/5

                2015-Now (Daily use) : BQ Aquaris E4.5 Ubuntu edition
                2016-Now (Daily use) : BQ Aquaris M10 FHD Betatester

                2020-Now : PinePhone Braveheart & CE UBports
                2020-Now (Family/Daily use): Vollaphone Xenial
                2022-Now (Family/Daily use): Vollaphone 22 Focal

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                • F Offline
                  flaun*in @Bolly
                  last edited by

                  @bolly MX4 - high power usage.jpg

                  I'm still facing this problem. Very high CPU usage while flight mode.
                  It's an Meizu MX4 on Release Channel (Version 113).
                  I already changed my battery! The phone is almost not usable as a daily driver with this bug!
                  Is there anything else I could do? How can I check if I got the fix?
                  Any help, pleas?

                  BollyB 1 Reply Last reply Reply Quote 0
                  • BollyB Offline
                    Bolly @flaun*in
                    last edited by

                    @flaun-in said in High CPU usage by kworker:

                    I'm still facing this problem. Very high CPU usage while flight mode.
                    It's an Meizu MX4 on Release Channel (Version 113).
                    I already changed my battery! The phone is almost not usable as a daily driver with this bug!
                    Is there anything else I could do? How can I check if I got the fix?
                    Any help, pleas?

                    Does it give the same percentage of charge when the phone is switched off and you put it on charge?

                    2015-Now (Daily use) : BQ Aquaris E4.5 Ubuntu edition
                    2016-Now (Daily use) : BQ Aquaris M10 FHD Betatester

                    2020-Now : PinePhone Braveheart & CE UBports
                    2020-Now (Family/Daily use): Vollaphone Xenial
                    2022-Now (Family/Daily use): Vollaphone 22 Focal

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                    • F Offline
                      flaun*in @Bolly
                      last edited by

                      @bolly
                      No, it's totally curious. Sometimes its more, sometimes its less!

                      Shutting down the phone helps sometimes. Then there's no battery drain while being in flight mode anymore.

                      BollyB 1 Reply Last reply Reply Quote 0
                      • BollyB Offline
                        Bolly @flaun*in
                        last edited by

                        @flaun-in said in High CPU usage by kworker:

                        No, it's totally curious. Sometimes its more, sometimes its less!

                        Then your battery is out of calibration.
                        To fix it you have to discharge the whole battery and with the phone switched off charge it to 100%. (Repeat the operation until it shows the same off as on).

                        2015-Now (Daily use) : BQ Aquaris E4.5 Ubuntu edition
                        2016-Now (Daily use) : BQ Aquaris M10 FHD Betatester

                        2020-Now : PinePhone Braveheart & CE UBports
                        2020-Now (Family/Daily use): Vollaphone Xenial
                        2022-Now (Family/Daily use): Vollaphone 22 Focal

                        F 1 Reply Last reply Reply Quote 0
                        • K Offline
                          kristatos
                          last edited by

                          I'm on RC since monday and until now everything works like it should, no battery drain anymore. I hope it's fixed.

                          BQ Aquaris E4.5 (UT 16.04)
                          Vollaphone (UT 20.04)

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                          • F Offline
                            flaun*in @Bolly
                            last edited by

                            @bolly
                            I replaced my battery with a new one and I didn't realise this problem any more so far!

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                            • F Offline
                              flaun*in
                              last edited by

                              photo_2021-09-01_21-34-04.jpg
                              This happens right know most of the time when I charge my phone during the night (switched off) and then turn it into flight mode while I'm working. Enormous battery drain within a few hours in flight mode!
                              So I basically always have to turn it out during a longer period I don't need it instead of using the flight mode. Very annoying!

                              Am I the only person facing this problem?
                              Any ideas? Any help welcome:)
                              Have a nice evening

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                              • K Offline
                                kristatos
                                last edited by

                                I'm on RC (starting with 113, now 115) with my E4.5 for over 10 days now and I haven't been affected by this bug anymore.

                                BQ Aquaris E4.5 (UT 16.04)
                                Vollaphone (UT 20.04)

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