This is most probably a once-in-a-million-years bug, it has just happened now and I had never seen this before; but it's so huge that it must be investigated and fixed. Don't tell me you can't reproduce, I know that.
At home I usually connect an external keyboard, mouse and screen to my laptop, using it as a desktop computer. Every once in a while I unplug everything and take the laptop to another room and keep using it, without suspending or shutting down.
I just did that and the touchpad has stopped working. I have no mouse right now. Since I don't know how to access the system menu with the keyboard only (if that's possible at all), I will launch a terminal with Ctrl-Alt-T and restart the system by typing "reboot".
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: unity 7.3.3+15.10.20151203-0ubuntu1
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
Uname: Linux 4.2.0-35-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Sun May 8 14:03:35 2016
InstallationDate: Installed on 2013-10-11 (939 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
SourcePackage: unity
UpgradeStatus: Upgraded to wily on 2016-01-18 (111 days ago)
---
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: teo 2081 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 15.10
HibernationDevice: RESUME=UUID=ff7e702a-a05a-47fd-8c14-551e81f9e9e3
InstallationDate: Installed on 2013-10-11 (941 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: Acer Aspire V3-571G
NonfreeKernelModules: nvidia
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-35-generic.efi.signed root=UUID=5830b30e-69e8-4bb4-8a2b-bc2b43c7414a ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
RelatedPackageVersions:
linux-restricted-modules-4.2.0-35-generic N/A
linux-backports-modules-4.2.0-35-generic N/A
linux-firmware 1.149.3
Tags: wily
Uname: Linux 4.2.0-35-generic x86_64
UpgradeStatus: Upgraded to wily on 2016-01-18 (112 days ago)
UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo vboxusers wireshark
_MarkForUpload: True
dmi.bios.date: 10/15/2012
dmi.bios.vendor: Acer
dmi.bios.version: V2.07
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: VA50_HC_CR
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V2.07
dmi.modalias: dmi:bvnAcer:bvrV2.07:bd10/15/2012:svnAcer:pnAspireV3-571G:pvrV2.07:rvnAcer:rnVA50_HC_CR:rvrType2-BoardVersion:cvnAcer:ct10:cvrV2.07:
dmi.product.name: Aspire V3-571G
dmi.product.version: V2.07
dmi.sys.vendor: Acer
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 1579506
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the Ubuntu Kernel Team.