Comment 0 for bug 1575250

To reproduce:

1. Close laptop lid.
2. Wait a couple of minutes.
3. Open laptop lid.

Result: the screen remains powered off and the system will not respond in any way. Pressing keys does nothing. Pressing the power button does nothing. There is no disk activity but the power light is lit. The only thing you can do is press the power button for four seconds or remove the battery.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-21-generic 4.4.0-21.37 [modified: boot/vmlinuz-4.4.0-21-generic]
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: al 1892 F.... pulseaudio
CurrentDesktop: Unity
Date: Tue Apr 26 16:46:08 2016
HibernationDevice: RESUME=UUID=8623f57e-2fc2-4a9a-bd35-73f33e1aeb59
InstallationDate: Installed on 2016-04-21 (4 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
MachineType: LENOVO 20040M18
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-21-generic root=UUID=0f83fbb5-4903-4610-9f32-1ab22c935bb0 ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-4.4.0-21-generic N/A
 linux-backports-modules-4.4.0-21-generic N/A
 linux-firmware 1.157
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/11/2010
dmi.bios.vendor: LENOVO
dmi.bios.version: 24CN61WW
dmi.board.name: Caucasus2
dmi.board.vendor: LENOVO
dmi.board.version: Rev 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Lenovo
dmi.chassis.version: Rev 1.0
dmi.modalias: dmi:bvnLENOVO:bvr24CN61WW:bd08/11/2010:svnLENOVO:pn20040M18:pvrLenovoIdeapadS10-3t:rvnLENOVO:rnCaucasus2:rvrRev1.0:cvnLenovo:ct10:cvrRev1.0:
dmi.product.name: 20040M18
dmi.product.version: Lenovo Ideapad S10-3t
dmi.sys.vendor: LENOVO