This error appears in my journal quite often after resuming laptop from suspend and when un-docking the machine in the meantime.
When docked, I usually only enable two external displays. Un-docked I only have the built-in display on the laptop. This was working flawlessly in 18.04 but is extremely buggy now after having upgraded to 18.10 for some reason.
When this happens, my screen(s) remain pitch black. Switching to TTYs and back does not help. CTRL+ALT+F1 gives me the GDM login, but when entering password it seems it switches to TTY2 (or whatever is at CTRL+ALT+F2), and the screen(s) remain black.
Logging in in a TTY and trying to "DISPLAY=:0.0 gnome-shell --replace" does not help.
<super>+P does not work (is this shortcut combination removed?).
At last when I ran "xrandr --auto" the session I had crashed and I had to re-login, but at least this time I got my desktop.
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.18.0-10-generic 4.18.0-10.11
ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
Uname: Linux 4.18.0-10-generic x86_64
ApportVersion: 2.20.10-0ubuntu13
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alexander 23057 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Fri Nov 9 20:34:53 2018
HibernationDevice: RESUME=/swapfile
InstallationDate: Installed on 2018-05-02 (190 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
MachineType: LENOVO 20HN0013MX
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-10-generic root=/dev/mapper/ubuntu--vg-root ro quiet splash net.ifnames=0 vt.handoff=1
RelatedPackageVersions:
linux-restricted-modules-4.18.0-10-generic N/A
linux-backports-modules-4.18.0-10-generic N/A
linux-firmware 1.175
SourcePackage: linux
UpgradeStatus: Upgraded to cosmic on 2018-11-01 (7 days ago)
dmi.bios.date: 09/14/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: R0IET55W (1.33 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20HN0013MX
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvrR0IET55W(1.33):bd09/14/2018:svnLENOVO:pn20HN0013MX:pvrThinkPadX270:rvnLENOVO:rn20HN0013MX:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad X270
dmi.product.name: 20HN0013MX
dmi.product.sku: LENOVO_MT_20HN_BU_Think_FM_ThinkPad X270
dmi.product.version: ThinkPad X270
dmi.sys.vendor: LENOVO
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