We found under some extreme system usage that comment #2 can fix the problem.
Run some application/operation (e.g: Play youtube on background, launch libreoffice for awhile (about 5-10min) or insert USB to copy some files : The touchpad cursor were no function after some operation, sometime it scrolling automatically or keep send press signal. Without the patch of comment #2, when the issue occurred we also check the touchpad event on ttyl1 by "evtest", we can found the event keeping output without move cursor/click touchpad. Our observation is the HiDPI platform may have more loading cause this issue and sometimes its also cause xorg crash. ** Attachment added: "Screenshot from 2015-05-27 17_24_59.png" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1456881/+attachment/4406011/+files/Screenshot%20from%202015-05-27%2017_24_59.png -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1456881 Title: Some touchpads' right button doesn't work under I2C mode, need support of clickpads Status in HWE Next Project: In Progress Status in linux package in Ubuntu: In Progress Status in linux source package in Trusty: Fix Committed Status in linux source package in Utopic: Fix Committed Bug description: We need to add this support, otherwise some touchpads' right button doesn't work under I2C mode. commit 015fdaa9f8edd89a456b3331088e1b77ebdad9d0 (patch) HID: multitouch: add support of clickpads Touchpads that have only one button are called clickpads and should be advertised as such by the kernel. Signed-off-by: Benjamin Tissoires <benjamin.tissoi...@redhat.com> Tested-by: Jason Ekstrand <ja...@jlekstrand.net> Signed-off-by: Jiri Kosina <jkos...@suse.cz> To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1456881/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp