Thanks for the log. It looks like Xorg gave up (but didn't "crash"):
mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: Fatal server error: mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: (EE) xf86OpenConsole: Switching VT failed mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: (EE) mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: (EE) mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: Please consult the The X.Org Foundation support mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: at http://wiki.x.org mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: for help. mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: (EE) Please also check the log file at "/var/lib/gdm3/.local/share/xorg/Xorg.2.log" for additional information. mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: (EE) mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: (WW) xf86CloseConsole: KDSETMODE failed: Operation not permitted mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: (WW) xf86CloseConsole: VT_SETMODE failed: Operation not permitted mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9292]: (EE) Server terminated with error (1). Closing log file. mars 14 11:12:21 celian-XPS-17-9700 /usr/libexec/gdm-x-session[9290]: Unable to run X server ** Package changed: ubuntu => xorg-server (Ubuntu) ** 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/1964386 Title: [Dell XPS 17 9700] Black screen when laptop lid is reopened To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1964386/+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
