AMD seems to submitted a patch for this:
http://www.spinics.net/lists/stable/msg139761.html
However, it may require another fix in i2c driver in order to completely
fix it
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Alex Hung (alexhung)
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https://bugs.launchpad.net/bugs/1598637
Title:
Dell Inspiron 5555 touchpad not working
Status in linux package in Ubuntu:
Confirmed
Bug description:
Installed Ubuntu 16.04 64 bit (also Linux Mint and other Ubuntu 16.04
based distros) on my Dell Inspiron 5555 AMD A10-8700P Radeon R6.
The touchpad sort-of works for a few seconds (pointer moves but
cliking fails) and after a while it hangs completely. The USB mouse
works with no issues though.
I've found following the steps given here
http://askubuntu.com/a/632570/55128 works:
1. Run
$ sudo -H gedit /etc/default/grub
In the open window edit line
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
it should look this way
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i8042.nopnp"
Save file and run
$ sudo update-grub
2. Run
$ echo "blacklist i2c_hid" | sudo tee /etc/modprobe.d/i2c-hid.conf
$ sudo depmod -a
$ sudo update-initramfs -u
$ echo "synaptics_i2c" | sudo tee -a /etc/modules
3. Reboot.
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