This issue cannot be reproduced on a laptop with touchscreen, so I think it's the issue of this touchscreen ubuntu@201305-13670:~$ xinput list ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ USB Optical Mouse id=11 [slave pointer (2)] ⎜ ↳ Advanced Silicon S.A CoolTouch(TM) System id=13 [slave pointer (2)] ⎜ ↳ Microsoft Bluetooth Notebook Mouse 5000 id=15 [slave pointer (2)] ⎣ Virtual core keyboard id=3 [master keyboard (2)] ↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)] ↳ Power Button id=6 [slave keyboard (3)] ↳ Video Bus id=7 [slave keyboard (3)] ↳ Video Bus id=8 [slave keyboard (3)] ↳ Power Button id=9 [slave keyboard (3)] ↳ Integrated_Webcam_FHD id=10 [slave keyboard (3)] ↳ LITE-ON Technology USB NetVista Full Width Keyboard. id=12 [slave keyboard (3)] ↳ Dell AIO WMI hotkeys id=14 [slave keyboard (3)]
This issue cannot be reproduced on a laptop with touchscreen, so I think it's the issue of this touchscreen 201305- 13670:~ $ xinput list Webcam_ FHD id=10 [slave keyboard (3)]
ubuntu@
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ USB Optical Mouse id=11 [slave pointer (2)]
⎜ ↳ Advanced Silicon S.A CoolTouch(TM) System id=13 [slave pointer (2)]
⎜ ↳ Microsoft Bluetooth Notebook Mouse 5000 id=15 [slave pointer (2)]
⎣ Virtual core keyboard id=3 [master keyboard (2)]
↳ Virtual core XTEST keyboard id=5 [slave keyboard (3)]
↳ Power Button id=6 [slave keyboard (3)]
↳ Video Bus id=7 [slave keyboard (3)]
↳ Video Bus id=8 [slave keyboard (3)]
↳ Power Button id=9 [slave keyboard (3)]
↳ Integrated_
↳ LITE-ON Technology USB NetVista Full Width Keyboard. id=12 [slave keyboard (3)]
↳ Dell AIO WMI hotkeys id=14 [slave keyboard (3)]