Ubuntu session doesn't start

[Jean-Baptiste Lallement]

Broken image 20200406

Test Case:
1. Install Ubuntu Desktop in Qemu
2. Reboot and login

Actual result:
User login and is back to GDM.
There is an xorg crash in the journal

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gdm3 3.34.1-1ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu24
Architecture: amd64
Date: Wed Apr 8 04:33:13 2020
InstallationDate: Installed on 2020-04-08 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200407)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)

[Jean-Baptiste Lallement (jibel)]

/usr/lib/gdm3/gdm-x-session[3073]: Xorg: ../../../../../../include/privates.h:121: dixGetPrivateAddr: Assertion `key->initialized' failed.
/usr/lib/gdm3/gdm-x-session[3073]: (EE)
/usr/lib/gdm3/gdm-x-session[3073]: (EE) Backtrace:
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 0: /usr/lib/xorg/Xorg (OsLookupColor+0x13c) [0x559c789d9d2c]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 1: /lib/x86_64-linux-gnu/libpthread.so.0 (funlockfile+0x60) [0x7f020965d41f]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0xcb) [0x7f020949a18b]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (abort+0x12b) [0x7f0209479859]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) unw_get_proc_name failed: no unwind info found [-10]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (?+0x0) [0x7f020947971a]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (__assert_fail+0x46) [0x7f020948af36]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 6: /usr/lib/xorg/Xorg (DRIMoveBuffersHelper+0xc15) [0x559c789a4cc5]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 7: /usr/lib/xorg/Xorg (DRI2Authenticate+0xa2) [0x559c789a6312]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 8: /usr/lib/xorg/Xorg (DRI2GetParam+0x944) [0x559c789a76d4]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 9: /usr/lib/xorg/Xorg (SendErrorToClient+0x354) [0x559c78878f44]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 10: /usr/lib/xorg/Xorg (InitFonts+0x3b4) [0x559c7887cfd4]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf3) [0x7f020947b0b3]
/usr/lib/gdm3/gdm-x-session[3073]: (EE) 12: /usr/lib/xorg/Xorg (_start+0x2e) [0x559c78866a3e]
/usr/lib/gdm3/gdm-x-session[3073]: (EE)
/usr/lib/gdm3/gdm-x-session[3073]: (EE)
/usr/lib/gdm3/gdm-x-session[3073]: Fatal server error:
/usr/lib/gdm3/gdm-x-session[3073]: (EE) Caught signal 6 (Aborted). Server aborting

[Daniel van Vugt (vanvugt)]

Yeah that's bug 1745345 which I'm told is a race and it seems more likely to happen in VMs.