I'm having the same issue on my Dell Venue 11 Pro 7140 with Intel® Core™ M-5Y71 CPU. First time I tried Ubuntu 20.04 and the touchpad issue was the some. I tried more OS is like Debian buster, Fedora 32 with no luck. Then I re-installed Ubuntu but I used the latest 20.04.1 and to my surprise everything works. I mean left and right click on the touchpad and the touchscreen also. When I opened the Ubuntu software center the touchpad error reappeared. The touchpad works on login page until I do a login.
I tried to investigate the issue: - I saved my dmesg when everything is working. - I created an lvm snapshot from the / partition and tried to restore it but the touchpad stop working after login... In the syslog I found some fwupd related errors so I tried to follow that clue. Then I found similar issue https://askubuntu.com/questions/1120267/synaptics-touchpad-disabled-after-login-after-recent-18-10-update Masking the service fwupd using systemctl mask fwupd.service command is partly solve the issue. Now, I have a working mouse cursole after login but the left and right click not working. I checked devices with with xinput: csaba@csaba-Venue-11-Pro-7140:~$ xinput --list ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ Synaptics T Pad V 01.31 Mouse id=9 [slave pointer (2)] ⎜ ↳ Synaptics T Pad V 01.31 Touchpad id=10 [slave pointer (2)] ⎜ ↳ SYNA7500:00 06CB:780E id=17 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Video Bus id=6 [slave keyboard (3)] ↳ Power Button id=7 [slave keyboard (3)] ↳ Integrated_Webcam_FHD: Integrat id=8 [slave keyboard (3)] ↳ Synaptics T Pad V 01.31 id=11 [slave keyboard (3)] ↳ Synaptics T Pad V 01.31 Consumer Control id=12 [slave keyboard (3)] ↳ Synaptics T Pad V 01.31 Wireless Radio Control id=13 [slave keyboard (3)] ↳ Integrated_Webcam_8M: Rear Inte id=14 [slave keyboard (3)] ↳ Intel Virtual Button driver id=15 [slave keyboard (3)] ↳ SYNA7500:00 06CB:780E id=16 [slave keyboard (3)] ↳ Dell WMI hotkeys id=18 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=19 [slave keyboard (3)] I enabled and disabled these and I find out which is the touchscreen and which the touchpad. Synaptics T Pad V 01.31 Mouse id=9 [slave pointer (2)] <---- Touchpad Synaptics T Pad V 01.31 Touchpad id=10 [slave pointer (2)] SYNA7500:00 06CB:780E id=17 [slave pointer (2)] <---- Touchscreen When I disabled the id 10 the mouse pointer still working with the touchpad and the touchscreen also. ** Attachment added: "working_toucpad.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1877655/+attachment/5432313/+files/working_toucpad.txt -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libinput in Ubuntu. https://bugs.launchpad.net/bugs/1877655 Title: [Dell Venue 11 Pro 7140] Trackpad does not work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libinput/+bug/1877655/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
