Xorg crashed with SIGABRT in glamor_make_current()

[Chris Halse Rogers]

X crashes when logging into a KDE or GNOME Shell session; the SDDM greeter doesn't tickle the relevant codepath. Similarly, starting X and running xterm against works fine.

It seems that glamor_priv is being unset somewhere?

This is entirely reproducible, and didn't occur in 17.10.

This system is somewhat weird, in that it's got both a Radeon and an NVIDIA card active in it, with displays connected to both.

ProblemType: Crash
DistroRelease: Ubuntu 18.04
Package: xserver-xorg-core 2:1.19.5-0ubuntu2
ProcVersionSignature: Ubuntu 4.13.0+bcachefs.git20180105.67e9882d-1-generic 4.13.13
Uname: Linux 4.13.0+bcachefs.git20180105.67e9882d-1-generic x86_64
ApportVersion: 2.20.8-0ubuntu6
Architecture: amd64
Date: Wed Jan 10 17:23:11 2018
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
ExecutablePath: /usr/lib/xorg/Xorg
ExtraDebuggingInterest: Yes, including running git bisection searches
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Pitcairn XT [Radeon HD 7870 GHz Edition] [1002:6818] (prog-if 00 [VGA controller])
   Subsystem: Gigabyte Technology Co., Ltd Pitcairn XT [Radeon HD 7870 GHz Edition] [1458:2554]
 NVIDIA Corporation GM107 [GeForce GTX 750 Ti] [10de:1380] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: ASUSTeK Computer Inc. GM107 [GeForce GTX 750 Ti] [1043:84bb]
MachineType: System manufacturer System Product Name
ProcCmdline: /usr/lib/xorg/Xorg -nolisten tcp -auth /var/run/sddm/{d1b73357-b856-41a6-8073-0a4d2de13cc3} -background none -noreset -displayfd 17 vt7
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 LANG=en_AU.UTF-8
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0+bcachefs.git20180105.67e9882d-1-generic root= ro quiet splash vt.handoff=7 break=mount
Signal: 6
SourcePackage: xorg-server
StacktraceTop:
 glamor_make_current (glamor_priv=0x0) at ../../../../glamor/glamor_utils.h:726
 glamor_block_handler (screen=0x55f93f2b9140) at ../../../../glamor/glamor.c:258
 radeon_cs_flush_indirect (pScrn=0x55f93f2bcb90) at ../../src/radeon_kms.c:108
 redisplay_dirty (dirty=0x55f93f3a3570, region=0x55f93f873220) at ../../src/radeon_kms.c:585
 radeon_dirty_update (scrn=0x55f93f2bc1f0) at ../../src/radeon_kms.c:884
Title: Xorg crashed with SIGABRT in glamor_make_current()
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:

dmi.bios.date: 07/05/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1904
dmi.board.asset.tag: Default string
dmi.board.name: Z170 PRO GAMING
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev X.0x
dmi.chassis.asset.tag: Default string
dmi.chassis.type: 3
dmi.chassis.vendor: Default string
dmi.chassis.version: Default string
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1904:bd07/05/2016:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnZ170PROGAMING:rvrRevX.0x:cvnDefaultstring:ct3:cvrDefaultstring:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.89-1
version.libgl1-mesa-dri: libgl1-mesa-dri 17.2.4-0ubuntu2
version.libgl1-mesa-glx: libgl1-mesa-glx 17.2.4-0ubuntu2
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

[Apport retracing service (apport)]

StacktraceSource:
 #0 0x00007f1c0ea8f0bb in ?? ()
 #1 0x000000000a392400 in ?? ()
 #2 0x0000000000000000 in ?? ()
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()

[Apport retracing service (apport)]

Thank you for your report!

However, processing it in order to get sufficient information for the
developers failed (it does not generate a useful symbolic stack trace). This
might be caused by some outdated packages which were installed on your system
at the time of the report:

no debug symbol package found for perl-base
no debug symbol package found for perl-base

Please upgrade your system to the latest package versions. If you still
encounter the crash, please file a new report.

Thank you for your understanding, and sorry for the inconvenience!

[Chris Halse Rogers (raof)]

Oh, ignore the retracer. It's just complaining that the stacktrace is from my -O0 nostrip build. The attached stacktrace is fully symbolic.

[Launchpad Janitor (janitor)]

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