Xorg crash

[Jon Watte]

Shortly after logging in for the first time, the screen goes black, and after a little while, I'm back at the login screen. A subsequent login puts me in "dumb software mode."

I'm using kernel parameter acpi_rev_override=5 as without it shutdown doesn't work. Problem is reproducible with and without this parameter.

WORKAROUND: Uninstall the xserver-xorg-video-nouveau package and login to GNOME Wayland session.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: xorg 1:7.7+19ubuntu3
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.7-0ubuntu3.7
Architecture: amd64
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb 9 10:45:29 2018
DistUpgraded: Fresh install
DistroCodename: artful
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Device [8086:591b] (rev 04) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:07be]
   Subsystem: Dell GP107M [GeForce GTX 1050 Mobile] [1028:07be]
InstallationDate: Installed on 2018-02-09 (0 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
MachineType: Dell Inc. XPS 15 9560
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-32-generic.efi.signed root=UUID=4305e654-6011-4413-ac27-724450f22361 ro quiet splash acpi_rev_override=5 vt.handoff=7
Renderer: Software
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/30/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.5.0
dmi.board.name: 05FFDN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.5.0:bd08/30/2017:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: XPS
dmi.product.name: XPS 15 9560
dmi.sys.vendor: Dell Inc.
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.83-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.4-0ubuntu1~17.10.2
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.4-0ubuntu1~17.10.2
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 2:2.99.917+git20170309-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2

[penalvch (penalvch)]

Jon Watte, thank you for reporting this and helping make Ubuntu better.

1) Regarding using kernel parameter:
acpi_rev_override=5

Could you please advise if you remove it altogether (i.e. perform a default boot) what happens?

2) Regarding your attempt to blacklist nouveau, as per your log below, it isn't blacklisted:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1748511/+attachment/5052050/+files/Lspci.txt

Hence, you may want to disable it in BIOS, or physically pull it out of the board so you don't have to maintain a blacklist effort.

3) Is this issue something that started to happen after an update? If so, which one specifically?

4) If you login to an xorg session instead of a wayland session, is this still reproducible?

[Jon Watte (jwatte)]

Thanks for the questions

1) Removing the kernel parameter causes the same problem (plus, shutdown doesn't work.)

2) I cannot take the graphics card out of the laptop, but I uninstalled the nouveau package xserver-xorg-video-nouveau. This may have improved things; see below!

3) This is on a fresh install of 17.10 on a freshly partitioned/formatted disk.

4) When I log in to an Xorg session (after removing the nouveau xorg driver,) the desktop takes a long time to appear. The computer is largely unresponsive to mouse/keyboard for many seconds, then becomes responsive for a second, then goes unresponsive again; this repeats a few times, before the desktop entirely locks up (and a SSH shell also is locked up at that point.) However, pointing on the touchscreen will move the cursor in this state; moving the touchpad does not move the cursor, and nothing can be clicked/interacted with.

Regarding 2) after logging into a default session (Wayland,) with the nouveau Xorg driver removed, but the nouveau kernel module still loaded (despite blacklisting,) it has not crashed my desktop yet.
vainfo seems to think that I have accelerated video decoding, and glxgears runs at 60 fps in full screen, so perhaps this is a workaround?

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 17.10 (artful) reached end-of-life on July 19, 2018.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.