Public bug reported:
I run Xubuntu on a Dell Latitude E6530 laptop with Intel graphics.
Ever since upgrading to 18.10 cosmic, the screen remains blank (and
powered off) after being locked. Moving the mouse or pressing keys on
the keyboard does not turn the screen back on. I found, more or less by
accident, that switching to another virtual terminal (Ctrl+Alt+F1) and
back will turn the screen back on and allow me to log in again. But this
doesn't always work and sometimes after suspend/resume I have to hard-
reset the machine in order to use it again.
Any ideas what might be wrong? Some googling leads me to believe that
this might be something to do with Light Locker but I don't know how to
troubleshoot that.
$ sudo lshw -class display
*-display
description: VGA compatible controller
product: 3rd Gen Core processor Graphics Controller
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 09
width: 64 bits
clock: 33MHz
capabilities: msi pm vga_controller bus_master cap_list rom
configuration: driver=i915 latency=0
resources: irq:29 memory:f6400000-f67fffff memory:e0000000-efffffff
ioport:f000(size=64) memory:c0000-dffff
What other diagnostic information can I provide?
** Affects: ubuntu
Importance: Undecided
Status: New
** Tags: blank lock resume screen suspend xubuntu
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https://bugs.launchpad.net/bugs/1804235
Title:
Xubuntu: screen does not wake up after being locked
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