Touchpad for Razer Blade doesn't work for ubuntu 16.04 - Ask Ubuntu


i have new razer blade 2016 , installed ubuntu 16.04 on it. however, can't touchpad work, although buttons do. have use external mouse.

here's output xinput:

$ xinput --list ⎡ virtual core pointer                      id=2    [master pointer  (3)] ⎜   ↳ virtual core xtest pointer                id=4    [slave  pointer  (2)] ⎜   ↳ logitech usb receiver                     id=11   [slave  pointer  (2)] ⎜   ↳ logitech usb receiver                     id=12   [slave  pointer  (2)] ⎜   ↳ razer razer blade                         id=14   [slave  pointer  (2)] ⎜   ↳ razer razer blade                         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)]     ↳ sleep button                              id=10   [slave  keyboard (3)]     ↳ razer razer blade                         id=13   [slave  keyboard (3)]     ↳ @ translated set 2 keyboard              id=16   [slave  keyboard (3)]     ↳ usb camera                                id=17   [slave  keyboard (3)] 

any thoughts?

$ uname -a linux greenshell 4.7.6-040706-generic #201609300531 smp fri sep 30 09:33:47 utc 2016 x86_64 x86_64 x86_64 gnu/linux 

and also

$apt-cache policy xserver-xorg-input-synaptics xserver-xorg-input-synaptics:   installed: 1.8.2-1ubuntu3   candidate: 1.8.2-1ubuntu3   version table:  *** 1.8.2-1ubuntu3 500         500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 packages         100 /var/lib/dpkg/status 

poured through dmesg , figured out. turns out due having nolapic flag set in grub. took out , touchpad works now.

when booting laptop, wait grub screen. when 'ubuntu' selected, press e edit startup options. make sure line starts linux not contain 'nolapic' flag (this disables apic, touchpad apparently requires). press f10 resume booting.

once ubuntu loads, touchpad should work. make change permanent edit /etc/default/grub (make sure grub_cmdline_linux_default not contain 'nolapic' flag).


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