Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v5.0-rc7 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] https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.0-rc7/ -- You received this bug notification because you are a member of Ubuntu Studio Bugs, which is subscribed to The Ubuntu Studio Project. Matching subscriptions: Ubuntu Studio Bugs, UbuntuStudio Bugs https://bugs.launchpad.net/bugs/1787857 Title: USB mouse cursor lags after random time of correct behaviour Status in Ubuntu Studio: Incomplete Status in linux package in Ubuntu: Confirmed Status in rtirq package in Ubuntu: Confirmed Bug description: I installed Ubuntu Studio 18.04.1 LTS. After the first apt-get update I noticed the following behaviour: after havig logged in, my USB mouse works normally for about ten seconds, then the cursor starts lagging a lot which makes the mouse pretty much unusable. The last dmesg always contain lines these: (more in attached file) [<000000009e659b0c>] irq_default_primary_handler threaded [<00000000fa56edac>] usb_hcd_irq [<000000009e659b0c>] irq_default_primary_handler threaded [<00000000fe1afb05>] _rtl_pci_interrupt [rtl_pci] Disabling IRQ #18 Out of frustration & curiosity I disabled most autostart apps (Settings > Session ... > Autostart) and re-enabled them after rebooting. Since then I rarely encounter the lagging cursor. If I open Settings > Mouse & Touchpad and toggle any option on/off the cursor starts lagging. How can make the cursor work reliably? Some comment in dmesg mentions "irqpoll" boot option Ubuntu Studio 18.04.1 4.15.0-20-lowlatency #21-Ubuntu SMP PREEMPT To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntustudio/+bug/1787857/+subscriptions -- Mailing list: https://launchpad.net/~ubuntustudio-bugs Post to : [email protected] Unsubscribe : https://launchpad.net/~ubuntustudio-bugs More help : https://help.launchpad.net/ListHelp
