fix an Ubuntu bug

[andreabellitto]

fix ubuntu bug releated to "Bumblebee Failed to load module “mouse” (module does not exist, 0)"

[Lekensteyn]

Do you have more details on why this would fix an issue?

[andreabellitto]

#749 (comment)

It's releated to the fact that in newer Ubuntu versions the package xserver-xorg-input-mouse was removed and it's now replaced by the package xserver-xorg-input-all.

I had these error:
$ optirun glxspheres [ERROR]Cannot access secondary GPU - error: [XORG] (EE) Failed to load module "mouse" (module does not exist, 0)

and my commit solved the problem, for me, and for other people too.

[Lekensteyn]

Are you sure that this patch is needed to "fix" the problem? Failure to load the mouse module is non-fatal, there must be something else wrong. The module has also been removed since Ubuntu 16.04 Xenial.

Can you post Xorg.8.log in the case where it fails to startup and one from a working scenario?