I read up on https://www.kernel.org/doc/Documentation/input/input.txt and tested with "evtest" for the RollerMouse and can see that the kernel emits proper events, as far as I understand.
### Single left click button Event: time 1525013249.812780, type 4 (EV_MSC), code 4 (MSC_SCAN), value 90001 Event: time 1525013249.812780, type 1 (EV_KEY), code 272 (BTN_LEFT), value 1 Event: time 1525013249.812780, -------------- SYN_REPORT ------------ Event: time 1525013249.936782, type 4 (EV_MSC), code 4 (MSC_SCAN), value 90001 Event: time 1525013249.936782, type 1 (EV_KEY), code 272 (BTN_LEFT), value 0 Event: time 1525013249.936782, -------------- SYN_REPORT ------------ ### Double click button Event: time 1525013251.656770, type 4 (EV_MSC), code 4 (MSC_SCAN), value 90001 Event: time 1525013251.656770, type 1 (EV_KEY), code 272 (BTN_LEFT), value 1 Event: time 1525013251.656770, -------------- SYN_REPORT ------------ Event: time 1525013251.660700, type 4 (EV_MSC), code 4 (MSC_SCAN), value 90001 Event: time 1525013251.660700, type 1 (EV_KEY), code 272 (BTN_LEFT), value 0 Event: time 1525013251.660700, -------------- SYN_REPORT ------------ Event: time 1525013251.664778, type 4 (EV_MSC), code 4 (MSC_SCAN), value 90001 Event: time 1525013251.664778, type 1 (EV_KEY), code 272 (BTN_LEFT), value 1 Event: time 1525013251.664778, -------------- SYN_REPORT ------------ Event: time 1525013251.668782, type 4 (EV_MSC), code 4 (MSC_SCAN), value 90001 Event: time 1525013251.668782, type 1 (EV_KEY), code 272 (BTN_LEFT), value 0 Event: time 1525013251.668782, -------------- SYN_REPORT ------------ What is inbetween what the kernel emits to /dev/input/eventX and what is registered by "xev" and "xinput"? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1767660 Title: Regression 16.04 LTS to 18.04 LTS: rollermouse double click button no longer result in double click "event" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-signed/+bug/1767660/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
