Cheers mates! I've found a workaround for this REALLY odd ubuntu issue.
Assuming you all have ELAN touchscreen devices, like mine, it represents an usb device. It seems that the ubuntu driver that controls the touchscreen has a bug, altough it could work natively as another xinput device. So, I blacklisted the "usbtouchscreen" on modprobe, using the command: "echo "blacklist usbtouchscreen" | sudo tee -a /etc/modprobe.d/blacklist.conf" (without quotes, of course) or just blacklist it using nano, as you prefer... :-) Reboot the thing and... voilà! Touchscreen works every time, no matter how many resume/suspend events you inflict to the beast. It's working just fine for me. So, guys, tell if it solves for you too! Have fun! -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xinput in Ubuntu. https://bugs.launchpad.net/bugs/1275416 Title: touchscreen do not work after suspend/resume Status in “xinput” package in Ubuntu: Confirmed Bug description: My laptop (Thinkpad X200T with multi-touch screen) installed the 'Trusty' ubuntu 14.04 (64bits), touchscreen works well after cold boot! But after suspend/resume, touchsreen do not response. Execute 'xsetwacom --list' in terminal, there is nothing, both 'wacom touch' and 'wacom stylus' are gone. I must logout and relogin or reboot, the touchscreen can be normal again. By the way, the same problem happens in the 'Saucy' ubuntu 13.10 (64bits). But in 'Raring' ubuntu 13.04 (64bits), this problem does no exist, touchscreen WORKS WELL after suspend/resume. This Thinkpad X200T updated the newest BIOS, and keep ubuntu OS up to date. Please fix this bug, because 14.04 is a very important version for touchscreen devices, and i think 'suspend/resume' function is important too. Thanks! --------------------------------------- Feb 4, 2014 update Oh I'm sorry, I find a new change for this bug that I never noticed before. I keep Trusty ubuntu up to date(Feb 4, 2014). When the OS's first boot from cold boot, touchscreen works well. Then if suspend/resume for the first time, touchscreen will not response. At this moment, logout and relogin, touchscreen works well again even after suspend/resume. Simply put, touchscreen do not response only after the first suspend/resume since a cold boot. Once the OS logout and relogin, touchscreen will work well after any suspend/resume. The key point is that the OS must logout and relogin for at least one time. Always keep 'Trusty' ubuntu OS updated. that's a strange bug To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xinput/+bug/1275416/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
