Very similar error occurs in Xubuntu 18.04: Description: Xorg crashed with SIGABRT in OsAbort()
Stack Trace: __GI_raise(sig=sig@entry=6) __GI_abort() OsAbort() ??() FatalError() xf86PostProbe() InitOutput() ??() __libc_start_main(…) _start() StacktraceTop: OsAbort() ??() FatalError() xf86PostProbe() InitOutput() Laptop Model: Lenovo Thinkpad P51s Kernel: 4.15.0-34-generic x86_64 The error typically pops up after I lock my laptop with an external monitor plugged in the HDMI port. There are no Errors in XorgLog nor in XorgLogOld, warnings only about missing /usr/share/fonts/X11/... Not using third party proprietary display driver. Please advise. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1751508 Title: Xwayland crashed with SIGABRT in OsAbort() from AbortServer() from FatalError() from InitOutput() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1751508/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp