I am running Ubuntu Budgie 17.10 installed “clean” on a Lenovo Thinkpad X1 Carbon (3rd generation). I use the touchpad to mark a block of text (e.g., as part of a copy-and-paste operation) by holding my thumb on the left part of the touchpad and moving another finger on the touchpad to select the area to be marked. This capability works fine until I awake my laptop (by opening the lid) from a suspended state (when the laptop lid is closed). After awaking from a suspend, if I hold my thumb on the left part of the touchpad, any other movements on the touchpad with another finger do not move the cursor on the screen. I have attached an image of the mouse/touchpad settings. Incidentally, selection of the “two finger scrolling” or “natural scrolling” options appear to have no effect on this issue. For completeness, if I use the physical left-mouse button (above the touchpad) I can then move a finger on the touchpad (or move the trackpoint “red button in the center of the keyboard”) to mark text. It is only when I am trying to mark text using a “holding a thumb” on the touchpad *PLUS* a moving finger on the touchpad that I encounter this issue after awaking the laptop from a suspended state. After a reboot of the system, all works fine, until a subsequent awaking from a suspend.
Status changed to 'Confirmed' because the bug affects multiple users.