Fixed in Ubuntu 15.04 "Vivid Vervet" and Ubuntu 14.04.3 LTS - see the "Kernel and Hardware support updates" section at https://wiki.ubuntu.com/TrustyTahr/ReleaseNotes/ChangeSummary/14.04.3
Fixed in Ubuntu 15.04 "Vivid Vervet" and Ubuntu 14.04.3 LTS - see the "Kernel and Hardware support updates" section at https:/ /wiki.ubuntu. com/TrustyTahr/ ReleaseNotes/ ChangeSummary/ 14.04.3