xorg freezes and crashes while using LibreOffice Impress

[Horst Schirmeier]

After using LibreOffice Impress (6.0.3-0ubuntu1) for a while, X.org freezes for several seconds; the mouse pointer is still movable, but neither LibreOffice nor KDE/Plasma reacts to it anymore. Then X.org crashes and brings me back to the login screen.

Some parts of the dmesg output before the crash look related:
[ 9220.383663] [drm] GPU HANG: ecode 9:0:0x86dffffd, in Xorg [1264], reason: Hang on rcs0, action: reset
[ 9220.383677] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9228.459076] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9236.363145] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9244.459158] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9252.395180] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9260.459159] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9269.451186] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9277.451225] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9291.435294] i915 0000:00:02.0: Resetting rcs0 after gpu hang
[ 9293.567253] [drm] Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xserver-xorg-video-intel 2:2.99.917+git20171229-1
ProcVersionSignature: Ubuntu 4.15.0-23.25-generic 4.15.18
Uname: Linux 4.15.0-23-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: KDE
Date: Tue Jun 19 20:52:06 2018
DistUpgraded: 2018-03-14 10:42:30,632 DEBUG /openCache(), new cache size 87346
DistroCodename: bionic
DistroVariant: kubuntu
ExtraDebuggingInterest: No
GraphicsCard:
 Intel Corporation HD Graphics 530 [8086:191b] (rev 06) (prog-if 00 [VGA controller])
   Subsystem: Lenovo HD Graphics 530 [17aa:5050]
   Subsystem: Lenovo GM108M [GeForce 940MX] [17aa:5050]
InstallationDate: Installed on 2016-11-26 (570 days ago)
InstallationMedia: Kubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.1)
MachineType: LENOVO 20FXS05500
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-23-generic root=/dev/mapper/vgubuntu-root ro kopt=root=/dev/mapper/vgubuntu-root nouveau.runpm=0
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to bionic on 2018-03-14 (97 days ago)
dmi.bios.date: 01/16/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: R07ET82W (2.22 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20FXS05500
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrR07ET82W(2.22):bd01/16/2018:svnLENOVO:pn20FXS05500:pvrThinkPadT460p:rvnLENOVO:rn20FXS05500:rvrNotDefined:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T460p
dmi.product.name: 20FXS05500
dmi.product.version: ThinkPad T460p
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu4
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.10.5-1ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau N/A

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.