I recently change laptop to asus A450L and install latest ubuntu 15.04, there is one annoying bug, touchpad not working after suspend, and need to reboot to make it working again.
Touchpad not present in xinput after suspend, this is my xinput before suspend :
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ ETPS/2 Elantech Touchpad 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)]
↳ Sleep Button id=9 [slave keyboard (3)]
↳ USB2.0 HD UVC WebCam id=10 [slave keyboard (3)]
↳ Asus WMI hotkeys id=13 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
this after :
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [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)]
↳ Sleep Button id=9 [slave keyboard (3)]
↳ USB2.0 HD UVC WebCam id=10 [slave keyboard (3)]
↳ Asus WMI hotkeys id=13 [slave keyboard (3)]
↳ AT Translated Set 2 keyboard id=14 [slave keyboard (3)]
using this trick working before suspend but not working after suspend:
sudo rmmod psmouse
sudo modprobe psmouse
Is there any other workaround ?
[update]
And it's even working again after hibernate (suspend on disk).
:~$ dmesg | grep serio1
[ 1.294732] psmouse serio1: alps: Unknown ALPS touchpad: E7=10 00 64, EC=10 00 64
[ 1.793203] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x361f01)
[ 1.806832] psmouse serio1: elantech: Synaptics capabilities query result 0x00, 0x15, 0x0c.
[ 1.875780] input: ETPS/2 Elantech Touchpad as /devices/platform/i8042/serio1/input/input5
...after suspend no additional output.
...after hibernate touchpad redetected again.
[ 2704.226793] psmouse serio1: alps: Unknown ALPS touchpad: E7=10 00 64, EC=10 00 64
[ 2704.725799] psmouse serio1: elantech: assuming hardware version 4 (with firmware version 0x361f01)
[ 2704.739412] psmouse serio1: elantech: Synaptics capabilities query result 0x00, 0x15, 0x0c.
[ 2704.808346] input: ETPS/2 Elantech Touchpad as /devices/platform/i8042/serio1/input/input20