It also happens here using a Thinkpad Helix. It started at the end of Octrober or in November until I updated the system. It is not a hardware problem, as it works as it should on windows and it worked before that date and before I updated with Ubuntu also.
It also happens here using a Thinkpad Helix. It started at the end of Octrober or in November until I updated the system. It is not a hardware problem, as it works as it should on windows and it worked before that date and before I updated with Ubuntu also.