The issue is still happening when the laptop stays in standby for several hours! This time I found something in the /var/crash directory: the new bug ID is #1788512, I'm not sure if it's related to this bug.
Please help to find the root cause and some workaround while it get fixed. Than you ** Changed in: xorg-server (Ubuntu) Status: Incomplete => New -- 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/1780677 Title: X session crash after resuming from suspend To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1780677/+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