[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
Daniel, can you please attach output of `grep . /sys/class/dmi/id/*`? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 20684 root 20 0 0 0 0 I 59.9 0.0 2:52.66 kworker/0:0-kacpi_notify I'm also having this on a Dell G7 laptop ( Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz ) with kernel 4.19.80. I have also tried kernel's 5.2.0 with the same result. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
This is also found on a Cannon Lake Intel SDP with Xeon E-2176G running v5.4-rc1 kernel. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
** Tags added: ubuntu-certified -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
** Tags added: cscc -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
Hi again: So, I tried both with restored default bios settings and default factory setting. The kworker process is still going at over 85%. I can turn it off w/ echo "disable" > /sys/firmware/acpi/interrupts/gpe6F in both cases. One odd thing I noticed. With the default settings, I have two devices I can boot from, one is ubuntu and the other is UEFI. If I try to boot from UEFI, I get an error message saying it can't start (can't find boot order?) and that it is changing the settings. When I look in the BIOS after this, the setting change I see is that ubuntu is now first in boot order. It boots fine after that. I also tried running the system with Secure Boot, after erasing virtualbox. This also has no effect on the kworker process. And, when I reinstalled VirtualBox, it gave me the option to create a MOK key and put it in place, which I did. System now starts with Secure Boot and VirtualBox on it (yay, progress!). kworker process continues to fire up at 85%+. Given that the out of control kworker process seems to be called by kthreadd, the 2nd process after system init (process 1), I'm guessing that it isn't something in the software on my system that is causing the issue. Maybe it's the specific hardware I have. Do you have a lshw? Peter -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
Hmm, I think the main bios change is that I have safe mode turned off (at least in part because of that unsigned module). I'll see what I can do the next time I restart the system. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
On your system, this is in kernel message: [ 0.104005] ACPI: GPE 0x6F active on init I just tested Precision 3630 Tower in our lab, no such message, and I don't see the issue here. /sys/firmware/acpi/interrupts/gpe6F stays at 0 all the time. Can you try "restore default settings" in BIOS? ** Also affects: dell-sputnik Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
Thanks Kai-Heng. Unfortunately, my system wouldn't boot with v4.13. I installed the following kernel-related files: linux-headers-4.13.16-041316_4.13.16-041316.201711240901_all.deb linux-headers-4.13.16-041316-generic_4.13.16-041316.201711240901_amd64.deb linux-image-4.13.16-041316-generic_4.13.16-041316.201711240901_amd64.deb -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
Can you try v4.13? There's a new commit introduced in v4.14: commit ecc1165b8b743fd1503b9c799ae3a9933b89877b Author: Rafael J. Wysocki Date: Thu Aug 10 00:30:09 2017 +0200 ACPICA: Dispatch active GPEs at init time In some cases GPEs are already active when they are enabled by acpi_ev_initialize_gpe_block() and whatever happens next may depend on the result of handling the events signaled by them, so the events should not be discarded (which is what happens currently) and they should be handled as soon as reasonably possible. For this reason, modify acpi_ev_initialize_gpe_block() to dispatch GPEs with the status flag set in-band right after enabling them. Signed-off-by: Rafael J. Wysocki Tested-by: Mika Westerberg Let's see if this commit introduce the regression. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
I've updated the BIOS for my system. It did not solve the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
** Changed in: linux (Ubuntu) Importance: Undecided => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
There's a BIOS update for this system, it might solve the issue. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
I should add that I issued the following last night: echo "enable" > /sys/firmware/acpi/interrupts/gpe6F And then tried to shut down my system. After 8 minutes, the system had not shut down, so I did so manually. Either the interrupts from the bug are preventing the shutdown or this is a separate problem. I have on occasion been able to complete a shutdown without holding the power key, but this was always with the interrupts enabled. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
I've now tested with 4.19-rc8. The kworker process remains at about 65% continuously. Not quite sure how to mark this as confirmed, but will try. ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
The issue began after a fresh system install on a new computer. Admittedly, the first system I installed was Qubes, with Fedora (24 I believe). When I decided Qubes wasn't adequate for my needs, I wiped the system (reformatted using gparted) and installed the latest Ubuntu (as of a month ago). The kworker process was out of control in both Fedora and Ubuntu. I have tried kernels 16, 17, and 18, latest as of about a week ago. 16 is no different than my current 15 (4.15). 17 and 18 show a 5% decrease in the kworker process. I haven't tried 4.19-rc8 yet because I thought rc was too rough for testing, but I'll try it on next boot. Am not hopeful that the problem is fixed. And, even if it is fixed in 4.19, that may not do me much good. I need virtualbox but I doubt it would run in 4.19. Plus I imagine there are more security vulnerabilities and compatibility issues with mainline testing kernels. It will probably take months to years for 18.04 to be using 4.19. Just a thought Best wishes, Peter -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1799235] Re: kworker process starts at 85% of cpu and stays there
Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem? Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.19 kernel[0]. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. Once testing of the upstream kernel is complete, please mark this bug as "Confirmed". Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19-rc8 ** Changed in: linux (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1799235 Title: kworker process starts at 85% of cpu and stays there To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1799235/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
