Public bug reported:
My touchpad stopped to work unexpectedly. I don't understand, the cause of
problem. Yesterday touchpad workes well, today I turned on my laptop, and
touchpad not working. Maybe the problem did apperes after I upgrade to kernel
4.15.0-74-generic, but it was upgraded two days ago.
1. My laptop model: HP Probook 450 G3
2. Manufacturer of touchpad - Synaptic, I don't know exact model
Touchpad doesn't work in ubuntu live cd too. But it works in bios uefi
and in windows installation cd.
xinput doesn't return information about touchpad
```
xinput
⎡ Virtual core pointer id=2 [master pointer (3)]
⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)]
⎜ ↳ A4TECH USB Device id=9 [slave pointer (2)]
⎜ ↳ A4TECH USB Device 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)]
↳ Sleep Button id=8 [slave keyboard (3)]
↳ HP HD Camera: HP HD Camera id=11 [slave keyboard (3)]
↳ AT Raw Set 2 keyboard id=12 [slave keyboard (3)]
↳ HP WMI hotkeys id=13 [slave keyboard (3)]
↳ HP Wireless hotkeys id=14 [slave keyboard (3)]
↳ A4TECH USB Device id=10 [slave keyboard (3)]
```
I tried to set kernel options
```
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.nomux=1 i8042.reset"
```
it didn't helped to me
In attachments
```
cat /proc/bus/input/devices
dmesg
```
```
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: touchpad
** Attachment added: "devices"
https://bugs.launchpad.net/bugs/1859028/+attachment/5318867/+files/devices
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https://bugs.launchpad.net/bugs/1859028
Title:
Touchpad not working after kernel upgrade
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