Today I installed Ubuntu Studio 18.10 64bit, after install I updated
4.18.0-18-lowlatency and now instead of what I observed in 4.15 kernels, see
that IRQ16 nobody cares does not occur and my mouse is OK. A780gm-a
motherboard , SB700.
Happier that I have progress but note I have IRQ18 nobody cares event and an
IRQ18 disabled occurring. Moving my mouse to the front panel exhibits same
laggy behavior.
$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 116 0 0 0 IO-APIC 2-edge timer
1: 0 0 775 0 IO-APIC 1-edge i8042
8: 0 0 0 1 IO-APIC 8-edge rtc0
9: 0 0 0 0 IO-APIC 9-fasteoi acpi
14: 0 0 0 0 IO-APIC 14-edge
pata_atiixp
15: 0 0 1476 0 IO-APIC 15-edge
pata_atiixp
16: 571 0 107 0 IO-APIC 16-fasteoi
ohci_hcd:usb3, ohci_hcd:usb4, snd_hda_intel:card0
17: 0 0 0 0 IO-APIC 17-fasteoi
ehci_hcd:usb1
18: 0 51217 0 0 IO-APIC 18-fasteoi
ohci_hcd:usb5, ohci_hcd:usb6, ohci_hcd:usb7, radeon
19: 59 0 0 32 IO-APIC 19-fasteoi
ehci_hcd:usb2, snd_hda_intel:card1
22: 9134 36093 0 0 IO-APIC 22-fasteoi
ahci[0000:00:11.0]
24: 0 0 0 17924 PCI-MSI 1048576-edge
enp2s0
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https://bugs.launchpad.net/bugs/1787743
Title:
Slow USB mouse input on linux-lowlatency
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