Public bug reported:

The cinnamon desktop freezes randomly so that the screen in no longer
updated and all mouse and keyboard input have no effect. It's possible
to switch to the gdm login string with Ctrl+Alt+F1 (re-login gets me
back to the frozen session) and to login via SSH where I was able to
save `dmesg` which reveals

[ 8159.719757] nouveau 0000:01:00.0: DRM: resuming object tree...
[ 8159.876532] nouveau 0000:01:00.0: DRM: resuming fence...
[ 8165.355536] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type 
mismatch - Found [Buffer], ACPI requires [Package] (20170531/nsarguments-95)
[ 8165.355729] ACPI: \_SB_.PCI0.PEG0.PEGP: failed to evaluate _DSM
[ 8165.355733] ACPI Warning: \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type 
mismatch - Found [Buffer], ACPI requires [Package] (20170531/nsarguments-95)
[ 8165.355927] nouveau 0000:01:00.0: DRM: evicting buffers...
[ 8165.355929] nouveau 0000:01:00.0: DRM: waiting for kernel channels to go 
[ 8165.355949] nouveau 0000:01:00.0: DRM: suspending fence...
[ 8165.357166] nouveau 0000:01:00.0: DRM: suspending object tree...

The only fix for me is to restart the machine in the gdm login screen
from the SSH shell.

I hope that additional debugging information is uploaded through apport,
if not I'm willing to provide it.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: xserver-xorg-video-nouveau 1:1.0.15-2
ProcVersionSignature: Ubuntu 4.13.0-21.24-generic 4.13.13
Uname: Linux 4.13.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CompizPlugins: No value set for 
CompositorRunning: None
CurrentDesktop: X-Cinnamon
Date: Tue Mar  6 18:54:07 2018
DistUpgraded: Fresh install
DistroCodename: artful
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes, including running git bisection searches
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 
09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:3904]
   Subsystem: Lenovo GK208M [GeForce GT 740M] [17aa:3904]
 Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000'] 
failed with exit code 1: Hint: You are currently not seeing messages from other 
users and the system.
       Users in the 'systemd-journal' group can see all messages. Pass -q to
       turn off this notice.
 No journal files were opened due to insufficient permissions.
MachineType: LENOVO 20221
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-21-generic 
root=UUID=fef6e7d4-2aad-4abc-840e-cb971b2c94c8 ro 
rootflags=subvol=ubuntu-main-root-tmp acpi_backlight=vendor
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: No upgrade log present (probably fresh install) 07/12/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 71CN51WW(V1.21)
dmi.board.asset.tag: No Asset Tag INVALID
dmi.board.vendor: LENOVO
dmi.board.version: 31900003WIN8 STD MLT
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo IdeaPad Z500 Touch
dmi:bvnLENOVO:bvr71CN51WW(V1.21):bd07/12/2013:svnLENOVO:pn20221:pvrLenovoIdeaPadZ500Touch:rvnLENOVO:rnINVALID:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoIdeaPadZ500Touch: IDEAPAD 20221
dmi.product.version: Lenovo IdeaPad Z500 Touch
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.83-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.8-0ubuntu0~17.10.1
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.8-0ubuntu0~17.10.1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.5-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.10.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

** Affects: xserver-xorg-video-nouveau (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: amd64 apport-bug artful ubuntu

You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-nouveau in Ubuntu.

  cinnamon session freezes after "ACPI Warning:
  \_SB.PCI0.PEG0.PEGP._DSM: Argument #4 type mismatch - Found [Buffer],
  ACPI requires [Package] (20170531/nsarguments-95)"

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