Xorg crashed with SIGABRT in OsAbort()

[Sam Lane]

System program problem detected error message after logging in on Ubuntu Budgie 20.10.
This error happens approximately 50% of the time when logging in. After logging in, everything then seems to work normally. Aside from the error message, there seems to be no noticeable effect of the crash.

ProblemType: Crash
DistroRelease: Ubuntu 20.10
Package: xserver-xorg-core 2:1.20.8-2ubuntu6
ProcVersionSignature: Ubuntu 5.8.0-18.19-generic 5.8.4
Uname: Linux 5.8.0-18-generic x86_64
ApportVersion: 2.20.11-0ubuntu45
Architecture: amd64
CasperMD5CheckResult: skip
CompositorRunning: None
Date: Tue Sep 22 14:33:54 2020
DistUpgraded: Fresh install
DistroCodename: groovy
DistroVariant: ubuntu
ExecutablePath: /usr/lib/xorg/Xorg
ExecutableTimestamp: 1599226356
ExtraDebuggingInterest: Yes, if not too technical
GraphicsCard:
 Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Skylake GT2 [HD Graphics 520] [17aa:2231]
InstallationDate: Installed on 2020-09-22 (0 days ago)
InstallationMedia: Ubuntu-Budgie 20.10 "Groovy Gorilla" - Alpha amd64 (20200921)
MachineType: LENOVO 20FJS0AJ00
ProcCmdline: /usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch
ProcCwd: /
ProcEnviron: PATH=(custom, no user)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-18-generic root=UUID=72bd1806-98fb-4fa6-be5b-638dec36ebc9 ro quiet splash vt.handoff=7
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 OsAbort ()
 ?? ()
 FatalError ()
 ?? ()
 __libc_start_main (main=0x55e7786bbf90, argc=11, argv=0x7ffd94d62b18, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffd94d62b08) at ../csu/libc-start.c:314
Title: Xorg crashed with SIGABRT in OsAbort()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: N/A
dmi.bios.date: 10/07/2016
dmi.bios.release: 1.13
dmi.bios.vendor: LENOVO
dmi.bios.version: N1KET26W (1.13 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20FJS0AJ00
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.5
dmi.modalias: dmi:bvnLENOVO:bvrN1KET26W(1.13):bd10/07/2016:br1.13:efr1.5:svnLENOVO:pn20FJS0AJ00:pvrThinkPadT560:rvnLENOVO:rn20FJS0AJ00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad T560
dmi.product.name: 20FJS0AJ00
dmi.product.sku: LENOVO_MT_20FJ_BU_Think_FM_ThinkPad T560
dmi.product.version: ThinkPad T560
dmi.sys.vendor: LENOVO
separator:

version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.102-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 20.1.7-1
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.8-2ubuntu6
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200714-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Apport retracing service (apport)]

Thank you for taking the time to report this crash and helping to make this software better. This particular crash has already been reported and is a duplicate of bug #1543192, so 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. Please continue to report any other bugs you may find.