Public bug reported:
First, let me say that I don't have a lot of information, and will be
happy if this is a "just me" thing. But here's what happened. Today
around 8:30am on Ubuntu 18.04.2 HWE, I performed an apt update and apt
upgrade. Among the things that got upgraded was for grub-common, among
a few others. Upgrade proceeds without error and I continue to use my
laptop. A few hours pass and a shut down my laptop. When I turn it
back on, it boots, but the screen doesn't redraw properly. Full-screen
windows don't properly show up, everything is real slow to render, mouse
is slow to move. I did a few things like try to switch to lightdm and
reinstall xserver-xorg, but that didn't help.
What *did* help was check on /etc/default/grub. My laptop needs to have
the Linux kernel parameter i915.modeset=1 in order for the display to
work normally. For some reason, this was absent after the update from
this morning. Considering grub-common updated, this is my suspect,
however I don't know why it happened.
I'd be welcome to include additional information, but I don't know what
to provide. And as I said, maybe it's just me.
** Affects: grub (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1823259
Title:
Update from grub-common AMD64 2.02-2ubuntu8.12 to 2.02-2ubuntu8.13
removed some Grub settings
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