[Bug 1990876] Re: kworker high CPU usage: issue with xhci_hub_control from xhci_pci kernel module
In my case, # echo 'on' > '/sys/bus/usb/devices/usb3/power/control' helps removing the high CPU usage of kworker and ksoftirqd. My PC (Ubuntu 22.04, 6.5.0-1020-oem) has a broken USB port on usb3 and dmesg reports "usb usb3-port7: over-current condition". Also, powertop is enabled on my PC and the status of "Autosuspend for USB device xHCI Host Controller [usb3]" was "Good". So, I changed the status to "Bad", which is equivalent to the command above, solving 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/1990876 Title: kworker high CPU usage: issue with xhci_hub_control from xhci_pci kernel module To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1990876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1990876] Re: kworker high CPU usage: issue with xhci_hub_control from xhci_pci kernel module
I would like to know if anyone found a solution for lg gram systems. Currently i am using HW and os see below. kernel is from mainline archive Operating System: Linux Mint 21.3 Kernel: Linux 5.19.17-051917-generic Architecture: x86-64 Hardware Vendor: LG Electronics Hardware Model: 17Z90Q-G.AA78G This kernel works, when you start the system without AC plugged. suspend, plug AC, wakeup. boot param for kernel is acpi_mask_gpe=0x6E 0x6e can be unmasked immediately after boot. All newer kernels i tested have the problem with kworkers driving the load to 3 and more, rendering the system unusable when on ac. Without AC plugged they all work fine, with far better performance and energy saving as the 5.19 The kernelfunction hogging cpu is always something like os_map_remove. Cant check it right now exactly while writing. Did anyone find a kernel version > 5.19 that works also on AC on these Systems? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1990876 Title: kworker high CPU usage: issue with xhci_hub_control from xhci_pci kernel module To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1990876/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
