2

Sometimes when resuming from suspend, my screen goes black, no input is accepted, and I'm forced to hard reboot. I discovered a core file, so I ran

sudo gdb --core=/core

which output:

Core was generated by `/usr/lib/xorg/Xorg -core :0 -seat seat0 -auth /var/run/lightdm/root/:0 -noliste'.
Program terminated with signal SIGBUS, Bus error.

There was no info in /var/log/Xor.0.log.old, apport generated a crash report under /var/crash but I couldn't decypher any meaningful info from it, /var/log/apport.log had a suspicious entry for the time of the crash:

ERROR: apport (pid 2725) Sat Jun  2 06:11:13 2018: is_closing_session(): no DBUS_SESSION_BUS_ADDRESS in environment

My graphics card uses driver i915 from package xserver-xorg-video-intel, so I installed xserver-xorg-video-intel-dbg to have its debugging symbols. All web pages about X debugging recommended installing xserver-xorg-core-dbg, but this package doesn't exist since Ubuntu 16.04, and I haven't found any equivalent package.

Does anybody know what package to install to get X core debugging symbols ?

2
  • 1
    You're addressing the wrong problem. See askubuntu.com/questions/162075/…
    – waltinator
    Jun 2, 2018 at 13:15
  • @waltinator, thanks for the link: I've just gone through it, there's a wealth of tips there. However, I have no problems booting: Xorg crashes when I resume from suspend, and I know it's crashing because it leaves a core behind, and apport generates a crash report confirming it. Jun 2, 2018 at 15:51

1 Answer 1

1

For intermittent X crash with SIGBUS on 18.04, please check this answer:

Ubuntu 18.04 error on waking up from sleep : Read-error on swap device


P.S. I think you wanted xserver-xorg-core-dbgsym

I found this on the list of packages on https://launchpad.net/ubuntu/+source/xorg-server

3
  • xserver-xorg-core-dbgsym is not in the Bionic repositories. But then again, thanks to your pointer, the problem is not with the X server, so the X debugging symbols will not be needed anymore. Jun 27, 2018 at 22:59
  • @PauloMarcelCoelhoAragão Debug symbols are in a separate repository. See askubuntu.com/a/487567/44179
    – Seth
    Jul 2, 2018 at 3:04
  • 1
    Bingo ! Thank you so much, @Seth, I've just added that repo to my sources, and indeed xserver-xorg-core-dbgsym is installable now. There was a minor glitch with askubuntu.com/a/487567/44179: bionic-security doesn't have a Release file, so only bionic and bionic-updates are available. Jul 2, 2018 at 13:48

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .