Xorg Crash on login

[shemgp]

Upgraded to focal development and rebooted. When I try to login, it doesn't allow me. Looking at the logs, there's a crash.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xserver-xorg 1:7.7+19ubuntu14
ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
Uname: Linux 5.4.0-18-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
Date: Mon Mar 23 21:44:35 2020
DistUpgraded: 2020-03-23 21:13:09,930 DEBUG Running PostInstallScript: './xorg_fix_proprietary.py'
DistroCodename: focal
DistroVariant: ubuntu
DkmsStatus:
 88x2bu, 0.1, 5.3.0-42-generic, x86_64: installed
 88x2bu, 0.1, 5.4.0-18-generic, x86_64: installed
 rtl8812au, 4.3.14, 5.0.0-23-generic, x86_64: built
ExtraDebuggingInterest: Yes
GraphicsCard:
 ASPEED Technology, Inc. ASPEED Graphics Family [1a03:2000] (rev 30) (prog-if 00 [VGA controller])
   Subsystem: Super Micro Computer Inc ASPEED Graphics Family [15d9:0969]
MachineType: Supermicro Super Server
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-5.4.0-18-generic root=/dev/mapper/lvmgrp0-os ro
SourcePackage: xorg
UpgradeStatus: Upgraded to focal on 2020-03-23 (0 days ago)
dmi.bios.date: 12/12/2017
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1.0b
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: A2SDi-16C-HLN4F
dmi.board.vendor: Supermicro
dmi.board.version: 0123456789
dmi.chassis.asset.tag: To be filled by O.E.M.
dmi.chassis.type: 17
dmi.chassis.vendor: Supermicro
dmi.chassis.version: 0123456789
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.0b:bd12/12/2017:svnSupermicro:pnSuperServer:pvr0123456789:rvnSupermicro:rnA2SDi-16C-HLN4F:rvr0123456789:cvnSupermicro:ct17:cvr0123456789:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: Super Server
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: 0123456789
dmi.sys.vendor: Supermicro
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.100-4
version.libgl1-mesa-dri: libgl1-mesa-dri 20.0.0-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 20.0.0-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.20.7-2ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20190815-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[shemgp (shemgp)]

Here's the user xorg log that shows the crash

[shemgp (shemgp)]

Here's the backtrace.

If I run:

sudo gdb --args /usr/lib/xorg/Xorg -nolisten tcp :1 vt2 -keeptty -logfile xorg.log

on terminal and on another terminal run:

export DISPLAY=:1
gnome-session

it crashes and the backtrace full is attached.

But if I just run:

export DISPLAY=:1
gnome-shell

it doesn't crash but loads gnome-shell.

So the problem only shows up in gnome-session, that's probably why gdm3 starts fine, but when logging in as a user, it crashes.

[shemgp (shemgp)]

Also, the latest mainline kernel didn't fix the problem:
https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.6-rc7/linux-modules-5.6.0-050600rc7-generic_5.6.0-050600rc7.202003230230_amd64.deb

[shemgp (shemgp)]

Here's the bt only.

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1745345, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.

[Launchpad Janitor (janitor)]

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

[Jérôme Bouat (jeromebouat)]

I get a crash which is not visible. It seems it occurs while ligthdm is starting after the system startup. Finally I get the lightdm invite and I can login.