@kaihengfen Here is the dmesg log after I added "i2c-hid.dyndbg=+p" to kernel parameter.
** Attachment added: "dmesg log with i2c-hid.dyndbg=+p to the kernel parameter" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1693440/+attachment/4907913/+files/dmesgnew -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1693440 Title: Cypress PS/2 Trackpad not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1693440/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
